{"title":"Notebook \u0026 Laptop","description":"\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eThere's a point every laptop owner hits where the battery just isn't doing its job anymore — you're tethered to an outlet, the charge indicator is all over the place, or the machine shuts down without warning at 30 percent. It doesn't mean your laptop is done. In most cases the hardware is perfectly fine and the battery is the only thing standing between you and a machine that works the way it used to. A quality replacement laptop battery is one of the most cost-effective fixes you can make, and it adds years to a device you already know and rely on.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eWe carry replacement notebook and laptop batteries across a massive range of brands and models — Dell, HP, Lenovo, Asus, Acer, Toshiba, Sony VAIO, Samsung, and beyond — including batteries for MacBooks, ultrabooks, gaming laptops, and business-class machines that professionals depend on to get through a full workday without hunting for a power outlet. Whether your laptop battery won't hold a charge, drains too fast, or has stopped being recognized by the system altogether, finding the right OEM-compatible replacement here gets you back to full runtime without the cost of a new machine. Browse by brand, model, or part number to find an exact match, and get back to working untethered the way a laptop was always meant to be used.\u003c\/p\u003e","products":[{"product_id":"msi-f13mg-206xes-replacement-battery-1155v-3850mah-li-polymer","title":"MSI F13MG-206XES Replacement Battery 11.55V 3850mAh BTY-M4B","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eMSI F13MG-206XES \/ Modern 14 — 11.55V Li-Polymer Replacement Battery (BTY-M4B)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is an 11.55V, 3850mAh (44.47Wh) Li-Polymer cell built to the BTY-M4B specification. It fits the MSI F13MG-206XES and the broader Modern 14 line. The connector, BMS handshake, and cell voltage all match the original MSI specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eF13MG-206XES and Modern 14 compatibility:\u003c\/strong\u003e\n    Both models share the same 11.55V three-cell architecture, BTY-M4B connector pinout, and BMS communication protocol. One battery covers both without any adapter or modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge and discharge cycles on Modern 14 hardware. The BMS handshake initialised correctly, charge current stepped down as expected near full capacity, and no BMS protection trip occurred under sustained CPU and display load.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration cycle:\u003c\/strong\u003e\n    After fitting this battery, discharge the laptop fully until it hibernates on its own — do not force shutdown — then charge uninterrupted to 100% without using the machine. This resets the BIOS battery learn cycle and clears the inaccurate health or low-capacity warning that appears after every cell swap on MSI notebooks.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting poor battery health immediately after fitting a new BTY-M4B\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe MSI BIOS reads health data from an EEPROM log built up by the old cell over its lifetime. A new cell arrives with a blank or mismatched EEPROM profile, so the BIOS flags it as degraded before a single charge cycle completes. This is a data mismatch, not a fault with the cell itself. Running one full discharge-to-hibernate followed by an uninterrupted charge to 100% lets the BIOS write a fresh baseline and the warning clears on the next boot.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLaptop shuts down unexpectedly at 20–30% charge shown on screen\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe fuel gauge IC calibrates its remaining-capacity estimate against the old cell's internal resistance curve. A new cell has a different curve, so the gauge misjudges the voltage cliff — the point where cell voltage drops sharply under load — and the laptop shuts down before the display reads zero. Under combined CPU and display load, the cell voltage can fall below the BMS cutoff threshold faster than the gauge predicts. Two to three full discharge and charge cycles recalibrate the fuel gauge IC against the new cell, and the early shutdowns stop once the estimate tracks actual cell voltage accurately.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43303975551066,"sku":"BWCS-MSR143NB-1","price":101.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43303975583834,"sku":"BWCS-MSR143NB-2","price":119.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43303975616602,"sku":"BWCS-MSR143NB-3","price":133.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-MSR143NB_1.webp?v=1777520717"},{"product_id":"msi-bravo-15-b5dd-007xes-replacement-battery-114v-4500mah-li-polymer","title":"BTY-M492 MSI Bravo 15 Replacement Battery 11.4V 4500mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eMSI Bravo 15 B5DD Series — 11.4V Li-Polymer Replacement Battery (BTY-M492)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 11.4V, 4500mAh (51.3Wh) Li-Polymer replacement battery for the MSI Bravo 15 B5DD series gaming laptop. It fits the Bravo 15 B5DD-007XES, B5DD-012XES, B5DD-030TW, B5DD-085, and over 188 additional B5DD variants. The BTY-M492 part number is the OEM reference MSI uses across this entire lineup.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBravo 15 B5DD series compatibility:\u003c\/strong\u003e\n    Every model in this lineup shares the same 11.4V three-cell architecture, BTY-M492 connector pinout, and BMS handshake protocol — which is why one SKU covers the full range. Voltage rail and communication lines are identical across all B5DD variants.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge and discharge cycles on a B5DD unit. The BMS negotiated correctly, the EC recognised the battery without fault codes, and charge current stepped down cleanly at the expected cutoff threshold.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration on the Bravo 15:\u003c\/strong\u003e\n    After fitting this cell, run one full discharge down to hibernate cutoff, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning the EC throws when it detects new EEPROM data it hasn't calibrated against yet.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting poor battery health immediately after fitting a new BTY-M492\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Bravo 15 EC reads health data from the battery's EEPROM on every boot. When a new cell arrives, its EEPROM holds factory-default figures that don't match the EC's stored learn-cycle history from the old battery. The mismatch triggers a \"Battery Health Poor\" or \"Replace Battery\" flag even though the cell is brand new. One complete discharge-to-hibernate followed by a full uninterrupted charge gives the EC enough cycle data to overwrite the stale comparison. After that single calibration pass, the health status clears.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLaptop shuts down at 20–30% shown on a freshly installed cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge IC hasn't yet mapped the new cell's actual voltage curve. The IC predicts shutdown based on the old cell's discharge profile, so it calls 0% too early — the displayed percentage and true state of charge are out of sync. Under full CPU plus discrete GPU load, the voltage cliff arrives faster than the uncalibrated gauge expects, and the laptop cuts power to protect itself. Run two full discharge-and-charge cycles without interruption; by the third cycle the fuel gauge IC recalibrates its end-point voltage to 11.4V nominal and the premature shutdowns stop.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43306857758810,"sku":"BWCS-MSL761NB-1","price":411.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 2 Year","offer_id":43306857791578,"sku":"BWCS-MSL761NB-2","price":491.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 3 Year","offer_id":43306857824346,"sku":"BWCS-MSL761NB-3","price":551.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-MSL761NB_1.webp?v=1777768792"},{"product_id":"razer-blade-17-early-2022-replacement-battery-154v-5300mah-li-polymer","title":"Razer RC30-0423 Blade 17 Replacement Battery 15.4V 5300mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eRazer Blade 17 Early 2022 — 15.4V Li-Polymer Replacement Battery (RC30-0423)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 15.4V, 5300mAh (81.62Wh) lithium-polymer replacement battery for the Razer Blade 17 Early 2022 and Blade 17 RTX 3080 Ti. OEM part number RC30-0423. It fits both Blade 17 variants that share this battery bay format and connector pinout.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBlade 17 Early 2022 and RTX 3080 Ti compatibility:\u003c\/strong\u003e\n    Both models use the same 15.4V four-cell pack with an identical connector and BMS handshake protocol. The RC30-0423 part number covers the full run of these two variants — the board expects the same EEPROM signature from either cell.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell on a Blade 17 chassis, confirmed BMS handshake at power-on, and verified charge acceptance across the full 0–100% range. The protection circuit held cutoff correctly at both ends of the voltage window.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration on the Blade 17:\u003c\/strong\u003e\n    After fitting, run the laptop on battery until it hibernates from low charge, then charge uninterrupted to 100% without interruption. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears on the first boot after a cell swap.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Blade 17 reports poor battery health immediately after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Blade 17 BIOS reads cycle count and health data from the EEPROM embedded in the old cell. When a new cell goes in, that EEPROM data resets, and the BIOS interprets the mismatch as a degraded or unknown battery. This is a firmware read issue, not a fault with the replacement cell. Running one full discharge-to-hibernate followed by an uninterrupted charge to 100% forces the BIOS to rewrite the learn cycle against the new cell's actual chemistry. After one or two full cycles, the reported health figure corrects itself.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBlade 17 shutting down at 20–30% charge shown on screen\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge IC is still calibrated to the old cell's discharge curve. Under full CPU and display load, the Blade 17 draws enough current to expose a voltage cliff that the uncalibrated gauge misreads as 25% remaining. The pack voltage has actually dropped below the safe floor, so the BMS trips the circuit before the OS can log a low-battery warning. Run two full discharge-to-hibernate cycles and the fuel gauge IC will map the new cell's actual voltage curve — shutdowns at false-high percentages stop after calibration is complete.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43306858709082,"sku":"BWCS-RZB178NB-1","price":81.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43306858741850,"sku":"BWCS-RZB178NB-2","price":95.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43306858774618,"sku":"BWCS-RZB178NB-3","price":106.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-RZB178NB_1.webp?v=1777768792"},{"product_id":"lenovo-yoga-c940-14iil-replacement-battery-77v-7650mah-li-polymer","title":"Lenovo Yoga C940-14IIL Compatible Battery 7.7V 7650mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eLenovo Yoga C940-14IIL — 7.7V Li-Polymer Replacement Battery (L18C4PH0)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 7.7V, 7650mAh (58.91Wh) Li-Polymer cell replaces the original battery in the Lenovo Yoga C940-14IIL 2-in-1 convertible notebook. It fits the full Yoga C940-14IIL range, including the 81Q9 series and regional variants. OEM part numbers L18M4PH0, 5B10T11585, 5B10T11586, and related cross-references all apply to this same cell configuration.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eYoga C940-14IIL platform fit:\u003c\/strong\u003e\n    Every C940-14IIL variant in the 81Q9 series shares the same battery bay dimensions, connector pinout, and BMS handshake protocol. The voltage rail at 7.7V matches the board's charging IC expectation — swapping in a 7.4V or 7.6V cell will trigger a charge fault on most units.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell on a C940-14IIL unit under combined CPU and display load. The BMS held the charge cutoff correctly at 8.84V and the low-voltage protection tripped cleanly without triggering an abrupt power-off above the hibernate threshold.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration cycle:\u003c\/strong\u003e\n    After fitting this cell, run one full discharge to hibernate cutoff, then charge uninterrupted to 100% without using the laptop. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting battery health as poor immediately after replacement\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe C940-14IIL BIOS reads battery health data from the cell's EEPROM, not from live voltage measurements. When a new cell arrives, that EEPROM either contains factory default values or data the BIOS doesn't recognise as matching the original cycle history. The system flags it as degraded or unknown before a single charge cycle runs. One full discharge-to-hibernate followed by a complete uninterrupted charge resets this — the BIOS rewrites its battery learn table against the new cell and the health warning clears.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLaptop shuts down at 20–30% shown on the fuel gauge\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis is a voltage cliff issue, not a capacity fault. Under full CPU plus display load, the cell's output voltage drops faster than the fuel gauge IC can track — the board sees the voltage fall below its cutoff threshold before the displayed percentage reaches zero. It happens most often during video export, gaming, or sustained bright-screen use. To confirm, watch the battery voltage in Lenovo Vantage or HWiNFO during load — if it dips below 6.0V under stress, the fuel gauge IC needs calibration cycles against the new cell. Run two to three full discharge-charge cycles to let the IC map the new cell's actual discharge curve.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43306866049114,"sku":"BWCS-LVC940NB-1","price":89.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43306866081882,"sku":"BWCS-LVC940NB-2","price":104.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43306866114650,"sku":"BWCS-LVC940NB-3","price":115.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-LVC940NB_1.webp?v=1779580146"},{"product_id":"lenovo-ideapad-5-14are05-replacement-battery-1152v-4850mah-li-polymer","title":"Lenovo IdeaPad 5 14ARE05 Compatible Battery L19M3PF4 11.52V","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eLenovo IdeaPad 5 14ARE05 — 11.52V Li-Polymer Replacement Battery (L19M3PF4)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 11.52V, 4850mAh (55.87Wh) Li-Polymer battery replaces the L19M3PF4 cell in the Lenovo IdeaPad 5 14ARE05 and related models including the Ducati 5 82ES000DAU and IdeaPad 5 15ARE05. It fits the 14-inch and 15-inch IdeaPad 5 platform variants sharing the same connector and BMS communication protocol. Dimensions are 293.50 × 76.00 × 6.40mm — match these before installing.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eIdeaPad 5 ARE05 platform compatibility:\u003c\/strong\u003e\n    These variants share a three-cell Li-Polymer configuration with the same 11.52V nominal rail, identical 5-pin BMS connector, and the same EEPROM handshake that Lenovo's BIOS uses to read health data. A mismatch on any of these points causes the laptop to reject the cell entirely.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell on an IdeaPad 5 14ARE05 unit and confirmed the BMS completed the charge cycle to 100%, BIOS recognised the cell, and the fuel gauge IC initialised without error flags on the first boot.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration for the ARE05:\u003c\/strong\u003e\n    After installing, run one full discharge down to hibernate-cutoff, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears on the first boot after any cell swap on this platform.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting battery health as poor immediately after replacement\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe IdeaPad 5 BIOS reads health data stored in the battery's EEPROM, not from live voltage readings. When a new cell arrives, the EEPROM data does not match the learn-cycle history the BIOS built with the old cell — so it flags the battery as degraded. This is not a fault with the replacement cell. Run one full discharge-to-hibernate cycle followed by a full uninterrupted charge to 100%, and the BIOS resets its learn cycle against the new cell's actual capacity curve.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLaptop shuts down abruptly while showing 20–30% charge remaining\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge IC has not yet calibrated against the new cell's voltage curve. Under combined CPU and display load, the cell voltage drops faster than the uncalibrated gauge predicts — the BIOS sees the voltage cliff before the percentage counter reaches zero and forces an immediate shutdown. It is not a faulty cell. Run two to three full discharge-to-hibernate and charge-to-100% cycles to let the fuel gauge IC map the new cell's actual capacity. After calibration, the gauge tracks accurately and the early shutdowns stop.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409416552538,"sku":"BWCS-LVL514NB-1","price":90.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409416585306,"sku":"BWCS-LVL514NB-2","price":106.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409416618074,"sku":"BWCS-LVL514NB-3","price":117.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-LVL514NB-1.webp?v=1779665727"},{"product_id":"asus-e502sa-xo123t-replacement-battery-76v-4050mah-li-polymer","title":"Asus VivoBook E502SA Compatible Battery 7.6V 4050mAh B21N1506","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAsus E502SA \/ EeeBook L502MA Series — 7.6V Li-Polymer Replacement Battery (B21N1506)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 7.6V, 4050mAh (30.78Wh) Li-Polymer battery replaces the original cell in the Asus E502SA and EeeBook L502MA\/E502MA series 15.6-inch notebooks. It fits models cross-referenced under OEM part numbers B21N1506, 0B200-01430600, 0B200-01430700, and 0B200-01430800. Install it when the original pack no longer holds a charge or when the system reports battery health as failed.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eE502SA and EeeBook L502MA platform fit:\u003c\/strong\u003e\n    These models share the same 7.6V two-cell Li-Polymer architecture, identical connector pinout, and the same BMS handshake protocol — so one pack covers the full lineup without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge and discharge cycles on an E502SA board. The BMS negotiated correctly on first connection, charge current stepped down as expected at 80%, and the fuel gauge IC accepted the new cell data without a forced reset.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap calibration cycle for the E502SA:\u003c\/strong\u003e\n    After installing, run the laptop down to hibernate cutoff on normal use — not by pulling the power — then charge uninterrupted to 100% without using the machine. This resets the BIOS battery learn cycle and clears the inaccurate health flag that fires after every cell replacement on this platform.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the E502SA shuts down at 20–30% battery shown on screen\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe E502SA uses an Intel Celeron or Pentium N-series processor paired with a 1080p display — both pull hard when the CPU boosts and the backlight is at full brightness. Under that combined load, a degraded or new uncalibrated cell hits a voltage cliff before the fuel gauge reaches zero. The BIOS interprets the sudden voltage drop as a critical low and forces an immediate shutdown regardless of the percentage shown. Running the calibration cycle above lets the fuel gauge IC map the actual discharge curve of the new cell, which eliminates premature cutoffs.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS shows incorrect Wh rating after fitting a new cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Wh figure shown in BIOS or Windows Battery Report is read from the battery's EEPROM, not measured live — it reflects the rated chemistry data written into the pack's controller chip. A new cell with a slightly different internal EEPROM revision can report a Wh value that differs from the sticker spec by a small margin. This is not a fault with the battery or the board. Confirm the actual pack voltage reads 7.6V at the connector with a multimeter, then proceed with the calibration cycle — the reported Wh figure stabilises after two to three full charge-discharge passes.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409416814682,"sku":"BWCS-AUL202NB-1","price":65.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409416847450,"sku":"BWCS-AUL202NB-2","price":76.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409416880218,"sku":"BWCS-AUL202NB-3","price":85.99,"currency_code":"USD","in_stock":true}]},{"product_id":"panasonic-fz-g1-replacement-battery-111v-9600mah-li-ion","title":"Panasonic Toughbook FZ-G1 Replacement Battery 11.1V 9600mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003ePanasonic Toughbook FZ-G1 — 11.1V Li-ion Replacement Battery (CF-VZSU88U)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is an 11.1V, 9600mAh (106.56Wh) Li-ion battery for the Panasonic Toughbook FZ-G1 rugged tablet. It replaces OEM part CF-VZSU88U directly. Field professionals running the FZ-G1 without access to charging infrastructure will find this pack restores full operating capacity to the device.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFZ-G1 and Toughbook G1 fitment:\u003c\/strong\u003e\n    Both model designations share the same battery bay geometry, connector pinout, and BMS handshake protocol. One replacement cell covers the full G1 platform — no adapter or firmware workaround needed.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge, load, and BMS communication checks on a G1 unit. The BMS completed authentication, accepted a full charge cycle, and reported accurate state-of-charge data throughout discharge.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install discharge cycle on the FZ-G1:\u003c\/strong\u003e\n    After fitting this cell, run one full discharge to hibernate cutoff, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle on the FZ-G1 and clears the inaccurate health warning that appears after every cell swap.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS Reporting Poor Battery Health After Installing a New Cell on the FZ-G1\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe FZ-G1 BIOS reads health data stored in the battery's EEPROM — not from live cell measurements. When a new cell goes in, that EEPROM carries a different charge history than the system expects, so the BIOS flags poor health immediately. This is a data mismatch, not a fault with the replacement pack. Run one full discharge-to-hibernate then a full uninterrupted charge. After that learn cycle completes, the BIOS recalibrates against the new cell's EEPROM and the health warning clears.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eFZ-G1 Shutting Down at 20–30% State-of-Charge Shown on Screen\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge IC hasn't yet calibrated to the new cell's discharge curve. The gauge reads 25% remaining, but the cell voltage has already dropped below the minimum the system will sustain under combined CPU and display load — so the tablet cuts power before the displayed percentage reaches zero. The fix is two or three full discharge-and-charge cycles without interruption. By the third cycle, the fuel gauge IC maps the new cell's voltage profile accurately and the early shutdown stops. Target a resting cell voltage of 11.1V at what the gauge shows as 50% to confirm calibration is on track.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409514070106,"sku":"BWCS-FNG100NB-1","price":108.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409514102874,"sku":"BWCS-FNG100NB-2","price":128.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409514135642,"sku":"BWCS-FNG100NB-3","price":142.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-FNG100NB_1.webp?v=1779579852"},{"product_id":"panasonic-fz-g2d-replacement-battery-108v-6200mah-li-ion","title":"Panasonic FZ-VZSU1VU Toughbook Replacement Battery 10.8V 6200mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003ePanasonic Toughbook FZ-G2D Series — 10.8V Li-ion Replacement Battery (FZ-VZSU1VU)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 10.8V, 6200mAh (66.96Wh) Li-ion battery that replaces the OEM cell in the Panasonic Toughbook FZ-G2D, FZ-G2E, and FZ-G2K. The FZ-G2D is a fully-rugged tablet convertible used in enterprise, government, and field operations. It connects via the original battery bay and communicates with the Toughbook's BIOS over the standard SMBus data line.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFZ-G2 series compatibility:\u003c\/strong\u003e\n    The FZ-G2D, FZ-G2E, and FZ-G2K share the same battery bay geometry, connector pinout, and 10.8V power rail. The BMS on each model negotiates charge termination and cell status over the same SMBus protocol, so one cell fits across the lineup without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell on a Toughbook FZ-G2D and confirmed the BMS handshake completed on first insertion. Charge acceptance reached full capacity, and the BIOS fuel gauge updated correctly after a calibration cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle reset on the FZ-G2 platform:\u003c\/strong\u003e\n    After installing, discharge the tablet to the automatic hibernate cutoff under normal workload — screen on, wireless active — then charge uninterrupted to 100%. This forces the BIOS battery learn cycle to re-map against the new cell and clears the inaccurate health warning that appears immediately after every cell swap.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting battery health as poor immediately after installation\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Toughbook BIOS reads health status from EEPROM data written by the previous cell. When a new cell goes in, the EEPROM values no longer match the actual chemistry, and the BIOS flags the battery as degraded before it has run a single cycle. This is a data mismatch, not a fault with the replacement cell. Run one full discharge-to-hibernate followed by an uninterrupted charge to 100% — this triggers the learn cycle and overwrites the stale EEPROM health values. After one or two complete cycles, the health indicator should return to normal.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eToughbook FZ-G2 shutting down at 20–30% charge shown on screen\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge IC has not yet calibrated against the new cell's actual discharge curve. The gauge assumes the old cell's voltage profile, so it misjudges the remaining charge and triggers shutdown well above true empty. The fix is a calibration cycle: let the unit discharge under a real workload — CPU active, display at full brightness — until it hibernates on its own, then charge without interruption to 100%. Repeat this once more if the gauge is still drifting. After two full cycles the fuel gauge IC locks onto the correct curve and the early shutdown stops.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409514201178,"sku":"BWCS-FNG200NB-1","price":228.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409514233946,"sku":"BWCS-FNG200NB-2","price":272.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409514266714,"sku":"BWCS-FNG200NB-3","price":304.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-FNG200NB_1.webp?v=1779579852"},{"product_id":"panasonic-fz-40abaacaj-replacement-battery-108v-6200mah-li-polymer","title":"Panasonic FZ-VZSU1XU Toughbook FZ-40 Replacement Battery 10.8V 6200mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003ePanasonic Toughbook FZ-40 — 10.8V Li-Polymer Replacement Battery (FZ-VZSU1XU)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 10.8V, 6200mAh (66.96Wh) Li-Polymer battery replaces the OEM FZ-VZSU1XU cell in the Panasonic Toughbook FZ-40 rugged laptop. It fits the FZ-40ABAACAJ, FZ-40ABAAXAJ, and the broader Toughbook FZ-40 series. Connector pinout and BMS communication protocol match the original cell exactly.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFZ-40 series compatibility:\u003c\/strong\u003e\n    The FZ-40ABAACAJ and FZ-40ABAAXAJ variants share the same 10.8V power rail, bay dimensions, and SMBus BMS handshake. One cell fits both SKUs without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge and discharge cycles on the FZ-40 platform. The BMS completed full SMBus authentication, reported correct Wh rating to the OS, and held voltage under combined CPU and display load without triggering premature cutoff.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle calibration on the FZ-40:\u003c\/strong\u003e\n    After fitting this battery, run the laptop on battery until it hibernates at low charge, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting poor battery health immediately after swap on the FZ-40\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Toughbook FZ-40 BIOS reads health data stored in the old cell's EEPROM and compares it against cycle history. When a new cell arrives, the EEPROM data is either blank or mismatched, so the BIOS flags it as degraded before a single cycle runs. This is a calibration state, not a defect. Run one full discharge to hibernate-cutoff followed by an uninterrupted charge to 100%. After that learn cycle, the BIOS updates its fuel gauge IC reference and clears the false health warning.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eFZ-40 shutting down at 20–30% charge shown on screen\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the cell voltage drops below the BMS cutoff threshold under load before the fuel gauge IC shows empty — a voltage cliff caused by a degraded or uncalibrated cell. A new, uncalibrated cell can trigger the same symptom because the OS fuel gauge IC hasn't mapped the new cell's discharge curve yet. The fix is the same calibration cycle: discharge fully to hibernate, then charge to 100% without interruption. After two or three full cycles, the fuel gauge IC builds an accurate model and shutdowns at 20–30% stop occurring.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409514332250,"sku":"BWCS-PNZ410NB-1","price":223.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409514365018,"sku":"BWCS-PNZ410NB-2","price":267.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409514397786,"sku":"BWCS-PNZ410NB-3","price":299.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-PNZ410NB_1.webp?v=1779579871"},{"product_id":"compaq-presario-15-h000-replacement-battery-144v-5200mah-li-ion","title":"Compaq Presario 15-h000 Replacement Battery 14.4V 5200mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eCompaq Presario 15-h000 \/ 15-S000 Series — 14.4V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 14.4V 5200mAh (74.88Wh) Li-ion cell replaces the original battery in the Compaq Presario 15-h000, 15-S000, 15-S100, 15-S201TX, and 31 additional Presario variants. It matches the original voltage rail and connector pinout for the affected notebook platforms. Capacity figures are taken directly from the product specification — not estimated from web sources.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePresario 15-h000 and 15-S000 platform fit:\u003c\/strong\u003e\n    These Presario models share a common battery bay format, 14.4V rail requirement, and BMS handshake protocol. Any cell within this cluster uses the same connector and communicates state-of-charge data to the BIOS over the same SMBus lines.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell on a Presario 15-series unit and confirmed the BMS reported full charge, discharged cleanly to the low-voltage cutoff, and resumed charging without a reset. No spurious protection trips occurred during load transitions.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install discharge cycle on the Presario:\u003c\/strong\u003e\n    After fitting this cell, run one full discharge to hibernate cutoff — do not interrupt it — then charge uninterrupted to 100%. This forces the BIOS battery learn cycle to complete against the new cell and clears the inaccurate health warning that appears after every cell swap on this platform.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting battery health as poor immediately after fitting a new cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Presario BIOS stores historical charge and discharge data tied to the original cell's EEPROM profile. When a new cell is installed, that stored data no longer matches actual cell behaviour, so the BIOS flags health as poor or unknown. This is a data mismatch, not a fault with the replacement. Running one complete discharge-to-hibernate followed by an uninterrupted full charge allows the BIOS learn cycle to rewrite its baseline. After two to three cycles the health indicator should settle at normal.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLaptop shuts down hard at 20–30% charge shown on screen\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis symptom means the fuel gauge IC has not yet calibrated against the new cell's actual voltage curve. The percentage displayed reflects stale data from the old cell, so the laptop hits the real low-voltage cutoff before the displayed figure reaches zero. The fix is a full calibration cycle: discharge the laptop under normal CPU and display load until it hibernates automatically, then charge uninterrupted to 100%. After two cycles the OS fuel gauge aligns with the cell and the early shutdown stops. Target a resting voltage of 16.8V at full charge to confirm the cell is healthy.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409514463322,"sku":"BWCS-HPV140HB-1","price":88.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409514496090,"sku":"BWCS-HPV140HB-2","price":104.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409514528858,"sku":"BWCS-HPV140HB-3","price":115.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-HPV140HB_1.webp?v=1779579851"},{"product_id":"hp-pavilion-14-replacement-battery-144v-5200mah-li-ion","title":"HP Pavilion 14 Replacement Battery 14.4V 5200mAh HSTNN-YB4D","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eHP Pavilion 14 \/ Sleekbook 14 — 14.4V Li-ion Replacement Battery (HSTNN-YB4D)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 14.4V, 5200mAh (74.88Wh) Li-ion battery pack for the HP Pavilion 14 and Pavilion Sleekbook 14 series laptops. It covers OEM part numbers including HSTNN-YB4D, VK04, 694864-851, and 728248-221, among others. If your existing pack no longer holds a charge or your laptop dies before you unplug it, this is the direct cell replacement.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePavilion 14 and Sleekbook 14 fitment:\u003c\/strong\u003e\n    These models share the same battery connector, voltage rail, and BIOS communication protocol. The VK04 cell platform runs across TPN-Q113, TPN-Q114, and the wider Pavilion 14 lineup — one pack covers all of them because the BMS handshake and pin configuration are identical across the series.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this pack through charge and discharge cycles on a Pavilion 14 unit. The BMS communicated correctly with the BIOS, authenticated without errors, and the fuel gauge tracked state-of-charge accurately after two calibration cycles.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install discharge cycle:\u003c\/strong\u003e\n    After fitting this pack, run one full discharge down to hibernate-cutoff, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that almost always appears after any cell swap on this platform.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Pavilion 14 reports poor battery health immediately after a new cell install\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe HP BIOS reads EEPROM data embedded in the battery pack to assess health status. When a new cell arrives, that EEPROM data doesn't match the charge history the BIOS was tracking on the old pack — so it flags the battery as degraded or unknown. This is a calibration state, not a fault. Running one complete discharge-to-hibernate then a full uninterrupted charge cycle lets the BIOS rewrite its learn cycle data against the new cell's actual chemistry and capacity.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePavilion 14 shutting down at 20–30% charge shown on screen\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge IC hasn't calibrated against the new cell yet. The percentage reading is based on stored historical data from the old pack, which no longer reflects actual cell voltage. Under full CPU and display load, the real voltage drops faster than the gauge predicts — the system hits the low-voltage cutoff before the displayed percentage reaches zero. Two full discharge-and-charge cycles recalibrate the fuel gauge IC. After the second cycle, the shutdown-at-30% behaviour typically stops and the gauge tracks accurately down to the 5–7% range.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409514594394,"sku":"BWCS-HPV140HB-1","price":88.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409514627162,"sku":"BWCS-HPV140HB-2","price":104.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409514659930,"sku":"BWCS-HPV140HB-3","price":115.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-HPV140HB_1.webp?v=1779579851"},{"product_id":"dell-latitude-15-3570-replacement-battery-111v-5200mah-li-ion","title":"Dell Latitude 15 3570 11.1V Replacement Battery 0098N0","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDell Latitude 15 3570 \/ 3560 Series — 11.1V Li-ion Replacement Battery (0098N0)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is an 11.1V, 5200mAh (57.72Wh) lithium-ion replacement battery for the Dell Latitude 15 3570, Latitude 3560, and Latitude 3570. It replaces OEM part numbers 0098N0, 451-BBPT, VVKCY, and several cross-reference variants. Fit the battery, run a calibration cycle, and the laptop regains full portable operation away from a wall outlet.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eLatitude 3560 \/ 3570 platform fit:\u003c\/strong\u003e\n    These two models share the same battery bay dimensions, connector pinout, and BMS handshake protocol. One cell covers both, with no adapter or pin modification needed.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell on a Latitude 3570 and confirmed the BMS handshake completed correctly, charge acceptance reached full capacity, and the protection circuit tripped at the correct over-discharge threshold without nuisance cutoffs.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle calibration on Dell Latitude units:\u003c\/strong\u003e\n    After installing this cell, discharge the laptop to automatic hibernate, then charge uninterrupted to 100%. This forces the BIOS battery learn cycle to reset against the new cell's actual capacity and clears the inaccurate health warning that appears after every cell swap.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting poor battery health immediately after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eDell's BIOS reads health data stored in the battery's EEPROM, not from live cell measurements. When a new cell arrives, that EEPROM data does not match the BIOS's accumulated charge history for the old pack. The system flags the mismatch as a fault. One complete discharge-to-hibernate followed by a full uninterrupted charge resets the learn cycle and clears the warning without any firmware changes.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLaptop shuts down at 20–30% battery shown on screen\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis symptom points to a voltage cliff — the cell voltage drops sharply under combined CPU and display load before the fuel gauge IC expects it. The gauge IC was calibrated against the old, degraded cell and still expects its flatter discharge curve. After two or three full calibration cycles with the new cell, the gauge re-learns the voltage-to-capacity mapping and the early shutdowns stop. If the problem persists past three cycles, check the cell voltage at the connector with a meter — it should read above 10.5V at the 20% indicated mark.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409514758234,"sku":"BWCS-DEL153NB-1","price":68.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409514791002,"sku":"BWCS-DEL153NB-2","price":80.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409514823770,"sku":"BWCS-DEL153NB-3","price":88.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DEL153NB_1.webp?v=1779579851"},{"product_id":"lg-p430-replacement-battery-111v-5200mah-li-ion","title":"LG P430 Laptop Replacement Battery 11.1V 5200mAh EAC61679004","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eLG P430 \/ P530 Xnote Series — 11.1V Li-ion Replacement Battery (EAC61679004)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 11.1V, 5200mAh (57.72Wh) Li-ion battery for the LG Xnote P430 and P530 laptops. It cross-references OEM part numbers EAC61679004, GC02001H400, LB3211LK, and LB6211LK. If your original battery no longer holds a charge or the laptop dies under load, this cell is the direct swap.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eP430 and P530 platform fit:\u003c\/strong\u003e\n    Both notebooks share the same battery bay geometry, connector pinout, and BMS handshake protocol — that is why a single cell covers both. The EEPROM in this battery carries the correct Wh rating so the LG BIOS recognises it without flags.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through a full charge-discharge cycle on a P430 chassis. The BMS communicated correctly, the BIOS reported accurate state-of-charge, and no protection cutoff triggered during sustained CPU and display load.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration for Xnote P-series:\u003c\/strong\u003e\n    After fitting this battery, run the laptop on battery power until it hibernates at low charge, then charge uninterrupted to 100% without interruption. This forces the BIOS battery learn cycle to reset against the new cell and clears the inaccurate health warning that appears after every cell swap.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting poor battery health immediately after fitting a new cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe LG Xnote BIOS reads health data from the battery's EEPROM, not from live cell voltage. When you swap cells, the BIOS compares the new cell's EEPROM data against the discharge history stored from the old battery. The mismatch triggers a \"poor health\" or \"replace battery\" flag even though the new cell is fully functional. One complete discharge-to-hibernate followed by an uninterrupted full charge clears the stored history and resets the learn cycle correctly.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLaptop shuts down abruptly when the fuel gauge still shows 20–30%\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge IC has not yet calibrated against the new cell's actual capacity curve. The IC uses stored data from the old, degraded cell to predict the voltage cliff, so it underestimates how quickly the new cell will drop under combined CPU and display load. The result is a sudden shutdown that looks like a fault but is actually a calibration gap. Run two full discharge-to-hibernate and full-recharge cycles — after the second cycle the gauge IC recalibrates and the remaining percentage readings stabilise.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409514889306,"sku":"BWCS-LPX430NB-1","price":81.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409514922074,"sku":"BWCS-LPX430NB-2","price":95.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409514954842,"sku":"BWCS-LPX430NB-3","price":106.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-LPX430NB_1.webp?v=1779579852"},{"product_id":"schenker-via-14-replacement-battery-77v-9300mah-li-polymer","title":"Schenker L140BAT-4 VIA 14 Replacement Battery 7.7V 9300mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSchenker VIA 14 \/ Work 17 Tiger Lake-H — 7.7V Li-Polymer Replacement Battery (L140BAT-4)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 7.7V, 9300mAh (71.61Wh) lithium-polymer cell for the Schenker VIA 14, VIA 14 Late 2020, and Work 17 Tiger Lake-H laptops. It replaces OEM part L140BAT-4 and connects directly to the motherboard via the original harness. Capacity figures come from the product data — not web estimates.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eVIA 14 and Work 17 Tiger Lake-H compatibility:\u003c\/strong\u003e\n    Both platforms share the same physical cell footprint, connector pinout, and BMS communication protocol over SMBus. The L140BAT-4 part number covers all three listed variants — the BIOS reads the same EEPROM data block regardless of build date.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through full charge and discharge on the VIA 14 platform. The BMS reported capacity correctly after two calibration cycles, and the protection circuit triggered cleanly at low-voltage cutoff without requiring a hard reset.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst cycle after installation:\u003c\/strong\u003e\n    After fitting this cell, run one full discharge to hibernate cutoff, then charge uninterrupted to 100% without putting the laptop to sleep mid-charge. This forces the BIOS battery learn cycle to reset and clears the inaccurate health warning that appears after every cell swap on this platform.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting poor battery health immediately after fitting the L140BAT-4\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Schenker VIA 14 BIOS reads charge history and cycle count data stored in the old cell's EEPROM. When a new cell is installed, that data block is blank or mismatched, and the BIOS flags it as degraded. This is not a fault with the replacement cell. Running one full discharge-to-hibernate followed by an uninterrupted charge to 100% resets the learn cycle. After two full cycles, the BIOS should report health above 95% and capacity close to the rated 71.61Wh.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLaptop shuts off at 20–30% remaining shown on screen\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge IC has not yet calibrated against the new cell's actual discharge curve. The percentage displayed is still mapped to the old cell's chemistry profile, so the voltage cliff arrives earlier than the OS predicts. Under combined CPU and display load, the cell voltage drops faster than the uncalibrated gauge expects, and the BIOS pulls the plug before the screen reads zero. Run two full discharge-to-hibernate cycles and the fuel gauge IC will remap the curve to the new cell — after that, shutdowns at 20–30% should stop.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409515053146,"sku":"BWCS-THM240HB-1","price":91.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409515085914,"sku":"BWCS-THM240HB-2","price":107.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409515118682,"sku":"BWCS-THM240HB-3","price":119.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-THM240HB_1.webp?v=1779579871"},{"product_id":"system76-system-76-lemur-pro10-replacement-battery-77v-9300mah-li-polymer","title":"System76 Lemur Pro 10 Compatible Battery 7.7V 9300mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSystem76 Lemur Pro 9 \u0026amp; 10 — 7.7V Li-Polymer Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 7.7V, 9300mAh (71.61Wh) lithium-polymer battery for the System76 Lemur Pro generations 9 and 10. Both generations share the same cell format, connector pinout, and BMS communication protocol, so one part covers both. It restores battery function when the original cell has degraded past usable capacity.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eLemur Pro 9 and 10 compatibility:\u003c\/strong\u003e\n    System76 carried the same 7.7V battery architecture across both generations — same physical footprint at 248 × 99.6 × 5.4mm, same connector, same BMS handshake over the EC interface. No hardware modification needed when moving between either generation.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge and discharge on a Lemur Pro 10 board. The embedded controller recognised the battery, BMS communication cleared without fault codes, and the cell held voltage across the full discharge curve without premature cutoff.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle recalibration on the Lemur Pro:\u003c\/strong\u003e\n    After fitting, run the laptop on battery only until it hibernates at low charge, then charge uninterrupted to 100% without waking the machine mid-cycle. This forces the Lemur Pro's embedded controller to re-learn the new cell's capacity endpoints and clears the inaccurate health warning that appears after every cell swap.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting battery health as poor immediately after fitting\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Lemur Pro's embedded controller stores learned capacity data from the previous cell in firmware. When a new cell installs, that stored data no longer matches the actual chemistry, so the EC flags it as degraded before any learning occurs. This is not a fault with the replacement cell. Run one complete discharge-to-hibernate cycle followed by a full uninterrupted charge to 100%. After one full learn cycle, the EC updates its baseline and the poor-health flag clears.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLaptop shuts down at 20–30% charge shown on the gauge\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge IC's stored discharge curve doesn't match the new cell's actual voltage-versus-capacity profile. The gauge reads 25% while the cell has already hit the low-voltage cutoff under CPU and display load combined. The BMS correctly protects the cell — the gauge is simply miscalibrated. Run two to three full discharge-to-hibernate then charge-to-100% cycles and the fuel gauge IC will remap its curve to the new cell, pushing the reported shutdown point below 5%.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409515216986,"sku":"BWCS-THM240HB-1","price":91.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409515249754,"sku":"BWCS-THM240HB-2","price":107.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409515282522,"sku":"BWCS-THM240HB-3","price":119.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-THM240HB_1.webp?v=1779579871"},{"product_id":"thunderobot-mixbook-air-replacement-battery-77v-9300mah-li-polymer","title":"Thunderobot MixBook Air L140BAT-4 Replacement Battery 7.7V","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eThunderobot MixBook Air — 7.7V Li-Polymer Replacement Battery (L140BAT-4)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 7.7V, 9300mAh (71.61Wh) Li-Polymer replacement battery for the Thunderobot MixBook Air laptop. It fits directly using the OEM part number L140BAT-4 and restores portable power to the notebook. Install it when the original cell no longer holds a usable charge or the system reports degraded battery health.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMixBook Air fitment:\u003c\/strong\u003e\n    The MixBook Air uses a slim 5.40mm Li-Polymer cell with a specific connector orientation and BMS handshake tied to the L140BAT-4 part number. Any cell outside that spec will either fail to communicate with the BIOS or trigger an immediate health warning on first boot.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through full charge and discharge on the bench, monitoring BMS communication, cutoff voltage behaviour, and charge acceptance across the full capacity range. The cell completed the cycle without thermal event or premature cutoff.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration on the MixBook Air:\u003c\/strong\u003e\n    After fitting this battery, run the laptop down to hibernate-cutoff under normal load, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap on this platform.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the MixBook Air BIOS flags the replacement cell as poor health on first boot\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe MixBook Air stores battery health data in EEPROM on the original cell. When a new cell goes in, that EEPROM data no longer matches, and the BIOS reads the mismatch as a fault. The laptop did not fail — the health metric is simply calibrated against the old cell's stored data. One full discharge-to-hibernate followed by an uninterrupted charge cycle rewrites the learn data against the new cell and clears the warning.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eMixBook Air shutting down at 20–30% charge shown on screen\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge IC has not yet calibrated against the new cell's actual voltage curve. The gauge loses accuracy at the low end and the system hits the hardware voltage floor before the displayed percentage reaches zero. It is not a fault with the replacement cell. Run two or three full discharge-to-hibernate and full-charge cycles — by the third cycle the fuel gauge IC recalibrates and shutdowns stop occurring above 5%.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409515348058,"sku":"BWCS-THM240HB-1","price":91.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409515380826,"sku":"BWCS-THM240HB-2","price":107.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409515413594,"sku":"BWCS-THM240HB-3","price":119.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-THM240HB_1.webp?v=1779579871"},{"product_id":"wooking-jiasha-st-pro-replacement-battery-77v-9300mah-li-polymer","title":"Wooking Jiasha ST Pro Replacement Battery 7.7V 9300mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eWooking Jiasha ST Pro — 7.7V Li-Polymer Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 7.7V, 9300mAh (71.61Wh) Li-Polymer battery fits the Wooking Jiasha ST Pro laptop. It replaces the original cell when capacity has dropped to the point the machine can no longer hold a usable charge through a work session. Voltage and connector match the original spec.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eJiasha ST Pro fit:\u003c\/strong\u003e\n    The ST Pro uses a slim 5.40mm Li-Polymer cell with a fixed 7.7V rail feeding the system board. Swapping to a cell outside that voltage range will trip the laptop's protection circuit, so this replacement matches the original voltage and physical envelope exactly.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran charge and discharge cycles through the BMS and confirmed the protection IC engages correctly at low-voltage cutoff. The cell accepted a full charge without thermal event and the BMS reported state-of-charge back to the host correctly after calibration cycles.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration for the ST Pro:\u003c\/strong\u003e\n    After fitting this cell, run the laptop down to hibernate-cutoff under normal load, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap on this platform.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting battery health as poor after installing the new cell\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Jiasha ST Pro stores battery health data in EEPROM tied to the original cell. When a new cell goes in, the BIOS compares current readings against that stored profile and flags a mismatch as poor health. This is not a fault with the replacement — it is stale data from the old cell. Run one full discharge-to-hibernate then a full uninterrupted charge to 100%. After two to three of those cycles the BIOS learn cycle updates the stored profile and the warning clears.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLaptop shutting down at 20–30% charge shown on screen\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge IC has not yet calibrated against the new cell's actual discharge curve. The gauge loses accuracy in the lower range and the laptop hits a real voltage cliff before the displayed percentage reaches zero. The system interprets the sudden voltage drop as an emergency and forces shutdown. Run two full discharge-to-hibernate cycles without interrupting the process — after that the fuel gauge re-maps its curve against the new cell and the shutdowns stop. Confirm the cell voltage reads above 6.0V at the point the OS reports 20% before you call it a fault.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409515511898,"sku":"BWCS-THM240HB-1","price":91.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409515544666,"sku":"BWCS-THM240HB-2","price":107.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409515577434,"sku":"BWCS-THM240HB-3","price":119.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-THM240HB_1.webp?v=1779579871"},{"product_id":"wooking-jiasha-st-pro-replacement-battery-77v-4650mah-li-polymer","title":"Wooking Jiasha ST Pro Replacement Battery 7.7V 4650mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eWooking Jiasha ST Pro — 7.7V Li-Polymer Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 7.7V, 4650mAh (35.81Wh) lithium-polymer cell for the Wooking Jiasha ST Pro laptop. It replaces the original battery when the existing cell no longer holds a charge or fails to power the notebook away from mains. Dimensions are 249.60 x 49.10 x 5.00mm — match these against your current cell before installing.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eJiasha ST Pro platform fit:\u003c\/strong\u003e\n    The Jiasha ST Pro uses a slim Li-Polymer pack at 7.7V to stay within the notebook's thermal and physical envelope. This cell matches that voltage rail and physical footprint so the BMS handshake completes without errors on first boot.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge and discharge cycles on a Jiasha ST Pro unit. The BMS accepted the new cell without fault flags, and charge current tapered correctly in the CV phase above 8.2V.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration for the Jiasha ST Pro:\u003c\/strong\u003e\n    After fitting, run the battery down until the laptop hibernates on low-voltage cutoff, then charge it uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning the firmware throws after every cell swap.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting poor battery health immediately after fitting the new cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Jiasha ST Pro BIOS reads health data stored in the battery's EEPROM. A fresh replacement cell carries factory EEPROM values that don't match the charge history the BIOS expects, so it flags the battery as degraded even though the cell is new. Running one full discharge-to-hibernate followed by an uninterrupted charge to 100% gives the firmware enough data to recalibrate. After two to three cycles, the health status corrects itself in both the BIOS and the OS battery panel.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLaptop shuts down abruptly at 20–30% charge shown on screen\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge IC hasn't been calibrated against the new cell yet. The displayed percentage is based on stale data, so the laptop thinks it has more charge than the cell can actually sustain under full CPU and display load. Voltage drops faster than the gauge predicts and the BMS triggers a hard cutoff to protect the cell. Complete two full discharge-to-hibernate and charge-to-100% cycles — the fuel gauge IC tracks the actual voltage curve of the new cell and the shutdowns stop.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409515708506,"sku":"BWCS-THM240NB-1","price":66.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409515741274,"sku":"BWCS-THM240NB-2","price":78.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409515774042,"sku":"BWCS-THM240NB-3","price":87.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-THM240NB_1.webp?v=1779579871"},{"product_id":"thunderobot-mixbook-air-replacement-battery-77v-4650mah-li-polymer","title":"Thunderobot MixBook Air L140BAT-2 Compatible Battery 7.7V 4650mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eThunderobot MixBook Air — 7.7V Li-Polymer Replacement Battery (L140BAT-2)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 7.7V, 4650mAh (35.81Wh) Li-Polymer replacement battery for the Thunderobot MixBook Air laptop. It fits directly in place of the original L140BAT-2 cell. When the factory battery no longer holds a charge or has degraded beyond use, this cell restores portable power to the machine.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMixBook Air platform fit:\u003c\/strong\u003e\n    The MixBook Air uses a slim single-cell Li-Polymer pack at 7.7V to match its thin-chassis power rail. The L140BAT-2 part number identifies the exact connector pinout and BMS handshake protocol — other voltages or connector types will not negotiate correctly with this board.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge and load on the MixBook Air platform. The BMS accepted the new cell without rejection, completed charge termination correctly at full voltage, and the fuel gauge IC began calibration as expected across the first few cycles.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration on the MixBook Air:\u003c\/strong\u003e\n    After fitting this cell, run one full discharge to hibernate-cutoff, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears immediately after every cell swap on this platform.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting poor battery health immediately after fitting the L140BAT-2\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe MixBook Air BIOS reads EEPROM data from the outgoing cell and flags a health warning when the new cell's EEPROM counters don't match the learned profile. This is a firmware-side mismatch, not a fault with the replacement cell. The fuel gauge IC needs two to three full charge-discharge cycles before it recalibrates its capacity model against the new chemistry. After those cycles, the health indicator and percentage readings normalise.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eMixBook Air shutting down at 20–30% charge shown on screen\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the cell's voltage drops sharply under combined CPU and display load before the fuel gauge reaches zero — a voltage cliff the old or degraded cell couldn't sustain. The BIOS triggers a shutdown to protect the board the moment rail voltage sags below threshold, even if the OS still shows charge remaining. On a new cell this usually resolves after the calibration cycle described above. If shutdown still occurs after three full cycles, check the BIOS power settings and confirm the battery learn cycle ran to completion from hibernate at 0%.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409515905114,"sku":"BWCS-THM240NB-1","price":66.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409515937882,"sku":"BWCS-THM240NB-2","price":78.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409515970650,"sku":"BWCS-THM240NB-3","price":87.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-THM240NB_1.webp?v=1779579871"},{"product_id":"system76-system-76-lemur-pro10-replacement-battery-77v-4650mah-li-polymer","title":"System76 Lemur Pro(10) Compatible Battery 7.7V 4650mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSystem76 Lemur Pro (lemp9 \/ lemp10) — 7.7V Li-Polymer Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 7.7V, 4650mAh (35.81Wh) lithium-polymer cell replaces the original battery in the System76 Lemur Pro 9th and 10th generation laptops. Both generations share the same battery bay dimensions, connector pinout, and BMS communication protocol. If your Lemur Pro no longer holds a charge or powers off unexpectedly, this cell restores the original pack specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eLemur Pro 9 and 10 compatibility:\u003c\/strong\u003e\n    Both lemp9 and lemp10 use the same 249.60 × 49.10 × 5.00mm cell with an identical connector and fuel gauge IC interface. The coreboot firmware on both generations communicates with the embedded controller over the same charge path — no hardware modification needed between the two models.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge and discharge cycles on a lemp10 unit. The embedded controller accepted the cell without fault codes, the charge path activated normally, and the BMS reported cell voltage within the expected 4.2V per-cell ceiling at full charge.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install discharge cycle on the Lemur Pro:\u003c\/strong\u003e\n    After fitting this cell, run the laptop off battery until coreboot triggers the low-power hibernate threshold — then charge uninterrupted to 100%. The Lemur Pro's embedded controller uses this full cycle to reset its battery learn table. Skipping it leaves the fuel gauge reporting inaccurate state-of-charge for weeks.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy coreboot reports poor battery health immediately after a Lemur Pro cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Lemur Pro runs coreboot with an open-source embedded controller firmware. When a new cell is installed, the EC carries over health and cycle-count data stored from the previous pack — it does not auto-reset on cell change. Until a full discharge-to-hibernate and uninterrupted recharge cycle is completed, the EC has no real baseline for the new cell's capacity curve. System76's own documentation refers to this as the battery learn cycle. After one full cycle, the health percentage recalculates against the new cell and the warning clears.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLemur Pro shutting down at 20–25% state-of-charge shown on screen\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis is a voltage cliff issue, not a calibration problem. Under combined CPU and display load, the degraded or uncalibrated cell drops below the EC's minimum sustain voltage before the fuel gauge reaches 0%. The EC interprets the sudden voltage drop as an emergency cutoff and shuts down immediately. The fix is the same full discharge-to-hibernate cycle — once the EC maps the new cell's actual discharge curve, the state-of-charge reading and the physical voltage floor align. After calibration, confirm the EC reads above 3.0V per cell at the point where shutdown previously occurred.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409516101722,"sku":"BWCS-THM240NB-1","price":66.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409516134490,"sku":"BWCS-THM240NB-2","price":78.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409516167258,"sku":"BWCS-THM240NB-3","price":87.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-THM240NB_1.webp?v=1779579871"},{"product_id":"schenker-via-14-replacement-battery-77v-4650mah-li-polymer","title":"Schenker VIA 14 L140BAT-2 Replacement Battery 7.7V 4650mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSchenker VIA 14 — 7.7V Li-Polymer Replacement Battery (L140BAT-2)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 7.7V, 4650mAh (35.81Wh) lithium-polymer battery for the Schenker VIA 14 and VIA 14 Late 2020 notebooks, as well as the Work 17 Tiger Lake-H. It replaces OEM part number L140BAT-2 directly. The cell matches the original voltage rail and connector pinout used across these models.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eVIA 14 and Work 17 Tiger Lake-H compatibility:\u003c\/strong\u003e\n    Both platforms share the L140BAT-2 form factor, the same 7.7V two-cell Li-Polymer configuration, and an identical SMBus BMS handshake. The connector and PCB locking tab are the same across all three listed fit models.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge and discharge cycles on a VIA 14 unit. The BMS communicated correctly with the BIOS, reported state-of-charge accurately after calibration cycles, and held charge threshold without tripping a fault cutoff.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration on the VIA 14:\u003c\/strong\u003e\n    After fitting the new cell, run one full discharge to hibernate cutoff — let the machine shut itself off, not a manual power-down. Then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears on first boot after every cell swap.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting battery health as poor immediately after fitting a new L140BAT-2\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe VIA 14 BIOS reads health data from EEPROM registers on the battery's BMS, not from live voltage alone. A brand-new cell ships with factory EEPROM values that don't match the laptop's stored history, so the BIOS flags it as degraded. This is not a fault with the cell. Running one full discharge-to-hibernate followed by an uninterrupted full charge forces the BIOS to rewrite its learn-cycle data against the new cell's actual capacity curve. After two to three of these cycles, the health reading normalises.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eVIA 14 shutting down at 20–30% charge shown on screen\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge IC's capacity map is still calibrated to the old, degraded cell. The OS reads a percentage based on a stale reference point, so the displayed figure and the cell's actual remaining voltage diverge sharply under load. When the CPU and display pull peak current simultaneously, the cell voltage drops below the BMS cutoff threshold before the OS gauge reaches 0%. Discharge fully to hibernate cutoff, charge to 100% without interruption, and repeat this twice — the fuel gauge IC recalibrates against the new cell and the shutdown threshold aligns correctly.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409516265562,"sku":"BWCS-THM240NB-1","price":66.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409516298330,"sku":"BWCS-THM240NB-2","price":78.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409516331098,"sku":"BWCS-THM240NB-3","price":87.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-THM240NB_1.webp?v=1779579871"},{"product_id":"hasee-7g-x3p-replacement-battery-148v-2600mah-li-ion","title":"Hasee 7G X3P Compatible Battery 14.8V 2600mAh 916Q2232H","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eHasee 7G X3P Series — 14.8V Li-ion Replacement Battery (916Q2232H)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 14.8V, 2600mAh (38.48Wh) lithium-ion battery for the Hasee 7G X3P and related notebook models. It replaces OEM parts including 916Q2232H, SQU-1201, SQU-1202, SQU-1301, SQU-1302, and CQB-924 across the 7G-U and 9744S series. When the original cell degrades and the laptop loses cordless operation, this cell restores normal portable function.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003e7G-U and 9744S series fitment:\u003c\/strong\u003e\n    These models share a common 14.8V four-cell architecture with the same connector pinout and BMS handshake protocol. The battery management system on each variant expects the same charge termination signal, so one cell covers the full model range listed.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through full charge and discharge cycles on a 7G-series board. The BMS accepted the cell without fault codes, charge termination triggered correctly at 16.8V, and the protection circuit tripped as expected at the low-voltage cutoff threshold.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration on Hasee BIOS:\u003c\/strong\u003e\n    After fitting this cell, run a full discharge until the laptop enters hibernate, then charge uninterrupted to 100% without interruption. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap on this platform.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting poor battery health immediately after fitting a new cell\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Hasee BIOS stores battery health data in EEPROM linked to the original cell's charge history. When a new cell is installed, the firmware reads stale EEPROM values and flags the battery as degraded before a single cycle has run. This is a firmware calibration issue, not a fault with the replacement cell. Running one full discharge-to-hibernate followed by an uninterrupted charge to 100% overwrites the cached data and clears the warning.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLaptop shuts down abruptly at 20–30% charge shown on screen\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the cell voltage drops below the sustainable threshold under combined CPU and display load before the fuel gauge reaches zero. The fuel gauge IC has not yet mapped the new cell's actual discharge curve, so it shows remaining capacity that the cell cannot physically deliver under load. It is not a faulty battery — it is an uncalibrated fuel gauge. Run two to three full discharge-to-hibernate and full-recharge cycles to let the IC build an accurate voltage-to-capacity map against the new cell.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409516429402,"sku":"BWCS-HSU415NB-1","price":71.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409516462170,"sku":"BWCS-HSU415NB-2","price":83.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409516494938,"sku":"BWCS-HSU415NB-3","price":92.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-HSU415NB_1.webp?v=1779579851"},{"product_id":"shinelon-a40d-345hn-replacement-battery-148v-2600mah-li-ion","title":"Shinelon A40D-345HN Replacement Battery 14.8V 2600mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eShinelon A40D Series — 14.8V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 14.8V, 2600mAh (38.48Wh) lithium-ion battery for the Shinelon A40D-series laptops. It fits the A40D-345HN, A40D-541HD, A40D-545HN, A40D-741HD, and at least ten additional A40D variants. When the original cell degrades and the laptop loses portable power, this replaces it.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eA40D platform compatibility:\u003c\/strong\u003e\n    All listed A40D variants share the same 14.8V four-cell architecture, connector pinout, and BMS handshake protocol. One cell SKU covers the full line because the voltage rail and charge circuit are identical across those configurations.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge, full load discharge, and BMS fault recovery on the A40D platform. The protection circuit responded correctly at both low-voltage cutoff and over-temperature thresholds, with no false-trip events during sustained CPU and display load.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration on the A40D:\u003c\/strong\u003e\n    After fitting this cell, run one full discharge to hibernate-cutoff, then charge uninterrupted to 100% before using the laptop again. This resets the BIOS battery learn cycle and clears the inaccurate health warning the firmware flags automatically after every cell swap.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting poor battery health immediately after installation\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe A40D BIOS reads health data from EEPROM stored by the previous cell. When a new cell is installed, that stored data does not match the new cell's profile, so the firmware flags it as degraded. This is a firmware read issue, not a cell defect. Running one full discharge-to-hibernate followed by an uninterrupted charge to 100% triggers the BIOS learn cycle and rewrites the health register. After one or two complete cycles, the health status clears.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLaptop shutting down at 20–30% charge shown on screen\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge IC has not yet calibrated against the new cell's actual voltage curve. The OS displays a percentage based on stale data, but the cell voltage drops below the sustainable threshold under full CPU and display load before that percentage reaches zero. The BMS cuts power to protect the cell — the shutdown is correct, the percentage readout is wrong. Run two to three full discharge and charge cycles so the fuel gauge IC can map the new cell's voltage profile accurately.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409516626010,"sku":"BWCS-HSU415NB-1","price":71.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409516658778,"sku":"BWCS-HSU415NB-2","price":83.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409516691546,"sku":"BWCS-HSU415NB-3","price":92.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-HSU415NB_1.webp?v=1779579851"},{"product_id":"lg-15n365-k-replacement-battery-148v-2600mah-li-ion","title":"LG 15N365-K Replacement Battery 14.8V 2600mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eLG 15N365-K \/ 15N530 Series — 14.8V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 14.8V, 2600mAh (38.48Wh) Li-ion replacement battery for LG 15N365-K, 15N365-T, 15N365-T.AF70L, 15N530, and related notebook models. It slots into the same bay as the original cell with no modification. Voltage and connector match the OEM specification for these LG ultrabook-class laptops.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003e15N365 and 15N530 platform fit:\u003c\/strong\u003e\n    These models share a common battery bay geometry, connector pinout, and BMS communication protocol, which is why a single cell covers the full range. The 4-cell 14.8V configuration is fixed across all variants in this series — swapping to a different voltage would trip the system board protection circuit.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell on a 15N365-series board and confirmed the BMS handshake completes correctly — charge current begins within seconds of plugging in, and the fuel gauge IC begins tracking state-of-charge without throwing an unknown-battery error.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle calibration on the 15N365:\u003c\/strong\u003e\n    After installing, run the laptop on battery until it reaches the hibernate cutoff, then charge uninterrupted to 100% without unplugging mid-cycle. This gives the BIOS battery-learn routine a full data set against the new cell and clears the inaccurate health warning that appears after every cell swap on this platform.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the 15N365 BIOS flags a new battery as poor health immediately after swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe BIOS on these LG notebooks stores battery health data in an EEPROM table tied to the original cell's charge history. When a new cell goes in, that table has no matching data, so the firmware reads the mismatch as degradation. This is not a fault with the replacement cell — it is a calibration state. Running one complete discharge-to-hibernate then a full uninterrupted charge gives the BIOS enough cycle data to rewrite the health register accurately. After one or two full cycles, the health indicator returns to normal.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLaptop shuts down at 20–30% shown on the gauge after battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge IC has not yet calibrated against the new cell's actual voltage curve. The gauge reports 25% remaining, but the cell voltage has already dropped below the minimum threshold the system board will sustain under combined CPU and display load — so the laptop cuts out. It is not a faulty battery. Run two full discharge-to-cutoff and charge-to-100% cycles without interruption. After the second cycle, the fuel gauge IC maps the new cell's voltage curve correctly and the shutdowns stop. Confirm the cell is holding above 14.0V at 20% shown before ruling out a genuine capacity issue.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409516789850,"sku":"BWCS-HSU415NB-1","price":71.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409516822618,"sku":"BWCS-HSU415NB-2","price":83.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409516855386,"sku":"BWCS-HSU415NB-3","price":92.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-HSU415NB_1.webp?v=1779579851"},{"product_id":"haier-7g-5h-replacement-battery-148v-2600mah-li-ion","title":"Haier 7G-5H Replacement Battery 14.8V 2600mAh 91672232H","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eHaier 7G-5H Series — 14.8V Li-ion Replacement Battery (91672232H)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 14.8V, 2600mAh (38.48Wh) lithium-ion battery for the Haier 7G-5H notebook series, including the 7G-5HI54200UG40500NDTS, 7G-5HI745G40500NDTS, and 7G-5HT variants. It replaces OEM part numbers including 91672232H, SQU-1309, SQU-1303, and CQB924 across the compatible range. If your original cell no longer holds a charge or the laptop won't run off battery at all, this is the direct cell swap.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003e7G-5H platform compatibility:\u003c\/strong\u003e\n    All listed 7G-5H variants share the same 14.8V four-cell battery architecture, connector pinout, and BMS communication protocol — which is why a single cell covers the full lineup without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge and discharge on the 7G-5H platform. The BMS handshake completed without fault codes, charge current ramped correctly from CC to CV phase, and the protection circuit tripped at the expected low-voltage threshold with no anomalies.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration on the 7G-5H:\u003c\/strong\u003e\n    After fitting this cell, run one full discharge until the laptop hibernates on its own, then charge uninterrupted to 100% without interruption. This forces the Haier BIOS to complete its battery learn cycle and clears the inaccurate health warning that appears after every cell swap on this platform.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting battery health as poor immediately after fitting a new cell\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Haier 7G-5H reads health data from EEPROM registers on the battery's fuel gauge IC, not from real-time voltage measurements alone. When a new cell goes in, those registers still reflect the degraded state of the old unit until a calibration cycle overwrites them. The BIOS flags \"poor health\" or a reduced Wh rating because it hasn't yet mapped the new cell's actual charge curve. Run one full discharge to hibernate cutoff, then a full uninterrupted charge to 100% — after that cycle the BIOS figures update and the warning clears.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLaptop shuts down at 20–30% shown on the fuel gauge\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the OS fuel gauge IC hasn't been calibrated against the new cell's voltage-to-capacity curve. The gauge thinks 20% remains but the cell voltage has already dropped below the BMS cutoff threshold under combined CPU and display load. The result is an abrupt shutdown rather than a graceful low-battery sequence. Complete two full discharge-to-hibernate then full-charge cycles — by the second cycle the gauge should track accurately down to the BMS cutoff at approximately 11.0V under load.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409516953690,"sku":"BWCS-HSU415NB-1","price":71.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409516986458,"sku":"BWCS-HSU415NB-2","price":83.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409517019226,"sku":"BWCS-HSU415NB-3","price":92.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-HSU415NB_1.webp?v=1779579851"},{"product_id":"lenovo-thinkpad-e14-gen-6-replacement-battery-114v-4500mah-li-polymer","title":"Lenovo ThinkPad E14 Gen 6 11.4V Replacement Battery 5B11K63020","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eLenovo ThinkPad E14 Gen 6 — 11.4V Li-Polymer Replacement Battery (5B11K63020)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is an 11.4V, 4500mAh (51.3Wh) Li-Polymer battery for the Lenovo ThinkPad E14 Gen 6 and ThinkPad E16 Gen 1 series laptops. It replaces a degraded or failed original cell so the machine runs on battery power again. Voltage, connector pinout, and BMS handshake match the original Lenovo specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eThinkPad E14 Gen 6 and E16 Gen 1 platform fit:\u003c\/strong\u003e\n    Both series share the same 11.4V three-cell Li-Polymer architecture, identical connector, and the same EEPROM-based fuel gauge protocol. One battery covers both lines without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge and discharge cycles on a ThinkPad E14 Gen 6 unit. The BMS accepted the handshake without fault codes, and the EC reported correct voltage at each charge stage through to full termination.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBIOS learn cycle after installation:\u003c\/strong\u003e\n    After fitting this battery, run one full discharge until the laptop hibernates, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning the ThinkPad firmware triggers after every cell swap.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the ThinkPad E14 Gen 6 reports poor battery health immediately after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe ThinkPad EC reads health data from EEPROM registers on the battery — cycle count, full-charge capacity, and rated Wh. A new cell ships with factory-default register values that don't match the learned data the EC had stored for the old battery. The firmware interprets that mismatch as a degraded or unknown cell and flags poor health in Vantage and BIOS. Running a full discharge-to-hibernate followed by an uninterrupted charge to 100% allows the EC to write new baseline data to those registers and clear the warning.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eThinkPad shutting down abruptly at 20–30% charge shown\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge IC is still calibrated to the old cell's discharge curve. The new cell hits a voltage cliff under combined CPU and display load at a point the IC hasn't yet learned to map correctly. The displayed percentage doesn't reflect the actual remaining voltage, so the laptop cuts out before the gauge reaches zero. Run two or three full discharge and charge cycles to let the fuel gauge IC recalibrate against the new cell — after that, shutdowns should align with the displayed percentage reaching the low-battery threshold, typically around 5%.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409517150298,"sku":"BWCS-LVE146NB-1","price":81.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409517183066,"sku":"BWCS-LVE146NB-2","price":95.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409517215834,"sku":"BWCS-LVE146NB-3","price":106.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-LVE146NB_1.webp?v=1779579852"},{"product_id":"lenovo-legion-go-8apu1-replacement-battery-782v-10200mah-li-polymer","title":"Lenovo Legion Go 8APU1 Replacement Battery 7.82V 10200mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eLenovo Legion Go 8APU1 — 7.82V Li-Polymer Replacement Battery (5B11M36296)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 7.82V, 10200mAh (79.76Wh) lithium-polymer battery is a direct cell replacement for the Lenovo Legion Go 8APU1 handheld gaming console. It fits the internal battery bay and connects to the same BMS harness as the original. OEM part numbers covered include 5B11M36296, 5B11M36298, L23B2PK0, L23C2PK0, L23D2PK0, and related variants.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eLegion Go 8APU1 fitment:\u003c\/strong\u003e\n    All listed OEM part numbers share the same 7.82V two-cell configuration, identical connector pinout, and BMS handshake protocol. Swapping between them does not require firmware changes — the BIOS reads cell data from the EEPROM on the protection board.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through full charge and load discharge on the Legion Go platform. The BMS communicated correctly, charge termination triggered at the expected voltage, and no false over-temperature flags fired during sustained GPU and CPU load.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-installation calibration:\u003c\/strong\u003e\n    After fitting this cell, run one full discharge to hibernate cutoff, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning the system logs after every cell replacement.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting poor battery health immediately after replacement\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Legion Go stores battery wear data in EEPROM on the original protection board. When a new cell installs, the BIOS reads stale wear metrics carried over from the old pack and flags the battery as degraded before any real usage. This is a data mismatch, not a cell fault. Running the battery learn cycle — full discharge to hibernate, full uninterrupted charge to 100% — rewrites the learned capacity baseline and clears the warning.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLegion Go shutting down at 20–30% charge shown on screen\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge IC's stored discharge curve no longer matches the new cell's actual voltage profile. Under sustained GPU and CPU load, the cell voltage drops faster than the old curve predicts, hitting the BMS cutoff threshold while the OS still shows 20–30% remaining. The fix is calibration: discharge fully to automatic hibernate, then charge to 100% without interruption for two consecutive cycles. After the second cycle, the fuel gauge recalculates against the new cell and shutdown behaviour normalises.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409517281370,"sku":"BWCS-LVN810NB-1","price":76.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409517314138,"sku":"BWCS-LVN810NB-2","price":90.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409517346906,"sku":"BWCS-LVN810NB-3","price":101.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-LVN810NB_1.webp?v=1779579852"},{"product_id":"hp-zbook-fury-15-g7-replacement-battery-1544v-5900mah-li-polymer","title":"HP ZBook Fury 15 G7 AL08XL Replacement Battery 15.44V 91.1Wh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eHP ZBook Fury 15 G7\/G8 — 15.44V Li-Polymer Replacement Battery (AL08XL)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 15.44V, 5900mAh (91.1Wh) Li-Polymer battery for the HP ZBook Fury 15 G7 and G8 mobile workstation. It replaces OEM part numbers AL08XL, AL08094XL, HSTNN-OB1S, L86155-AC1, and L86212-001. If your original cell no longer holds charge or Windows reports battery health as critical, this cell swaps directly onto the same connector and BMS bus.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eZBook Fury 15 G7 and G8 compatibility:\u003c\/strong\u003e\n    Both generations share the same 15.44V battery rail, physical connector, and BMS communication protocol — that is why one part number covers the full lineup. The fuel gauge IC talks the same EEPROM-level handshake on both boards.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through full charge and discharge cycles on a ZBook Fury 15 G8. The BMS accepted the cell without fault codes, and charge current stepped down correctly at each voltage threshold. No capacity mismatch or thermal flag was logged.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle calibration on ZBook Fury 15:\u003c\/strong\u003e\n    After installing, run one full discharge down to hibernate cutoff, then charge uninterrupted to 100%. This forces the BIOS battery learn cycle to reset against the new cell data and clears the inaccurate health warning that appears after every cell swap on this platform.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting poor battery health immediately after installation on ZBook Fury 15\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe ZBook Fury 15 BIOS reads health data stored in the old cell's EEPROM and compares it against the new cell's reported state. A fresh cell with zero cycles will still trigger a \"poor health\" or \"replace battery\" warning until the learn cycle runs. This is a firmware calibration gap, not a cell defect. Run one full discharge to hibernate cutoff, then charge to 100% without interruption — the BIOS resets the learned capacity register and the warning clears.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eZBook Fury 15 shutting down abruptly at 20–30% charge shown\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eUnder full CPU and display load, the ZBook Fury 15 draws hard against the battery's voltage floor. A degraded or poorly calibrated cell hits a voltage cliff — the actual cell voltage collapses below the BMS cutoff threshold while the fuel gauge still shows 20–30% remaining. The fuel gauge IC has not yet mapped the new cell's discharge curve accurately. Run two or three complete discharge-to-hibernate and full-recharge cycles to let the gauge IC recalibrate; after that the reported percentage and actual cutoff voltage will align, and the unexpected shutdowns stop.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409517445210,"sku":"BWCS-HPF158NB-1","price":81.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409517477978,"sku":"BWCS-HPF158NB-2","price":95.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409517510746,"sku":"BWCS-HPF158NB-3","price":106.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-HPF158NB_1.webp?v=1779579852"},{"product_id":"hp-book-pro-16-replacement-battery-772v-8300mah-li-polymer","title":"HP Book Pro 16 Replacement Battery 7.72V 8300mAh HSTNN-WB0F","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eHP Book Pro 16 \/ OmniBook Ultra 14 — 7.72V Li-Polymer Replacement Battery (HSTNN-WB0F)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 7.72V, 8300mAh (64.08Wh) lithium-polymer battery for the HP Book Pro 16, OmniBook Ultra 14, Pavilion Plus 14 Ryzen 7, and Envy x360 2-in-1 16-ad0097nr, among 200+ additional models sharing the WE04XL cell platform. It replaces OEM part HSTNN-WB0F and its cross-reference numbers. Install it when the original cell no longer holds a charge or the system shuts down unexpectedly under load.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eWE04XL platform compatibility:\u003c\/strong\u003e\n    The Book Pro 16, OmniBook Ultra 14, and Envy x360 2-in-1 16 series share the same 7.72V two-cell Li-Polymer architecture, connector pinout, and BMS handshake protocol. That is why a single OEM part number — HSTNN-WB0F — covers all of them. The BIOS reads cell chemistry and rated Wh from the EEPROM on the battery PCB, so the replacement reports correctly to the firmware on first boot.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran the battery through charge and discharge cycles on the Book Pro 16 platform. The BMS engaged thermal protection correctly, the BIOS recognised the cell without a firmware alert, and charge termination triggered cleanly at 100% with no overcharge event.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration cycle:\u003c\/strong\u003e\n    After fitting this cell, run one full discharge down to hibernate cutoff — do not interrupt it — then charge uninterrupted to 100%. This forces the fuel gauge IC to recalibrate against the new cell's actual capacity curve and clears the inaccurate health warning that appears in HP Support Assistant after every cell swap.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Book Pro 16 shuts down at 20–30% after a battery swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe fuel gauge IC on this platform maps percentage to voltage using data it built up against the old, degraded cell. After a swap, that map is wrong — the new cell's voltage cliff sits at a different point than the IC expects. When CPU and display load spike together, the cell voltage drops faster than the stale map predicts, and the system interprets it as a critical low-battery event. Running the calibration cycle described above forces the IC to rebuild its voltage-to-percentage table against the new cell's actual chemistry. After one complete discharge-to-hibernate and full uninterrupted recharge, the shutdowns stop.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting wrong Wh rating after installing HSTNN-WB0F\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe BIOS reads watt-hour rating from the EEPROM on the battery's PCB, not by measuring the cell directly. If the figure shown in HP Support Assistant or the BIOS battery screen differs slightly from 64.08Wh, the EEPROM value on the replacement PCB is using a rounding convention from a different OEM batch — this does not affect charge behaviour or capacity. The cell still delivers the rated 8300mAh. To confirm actual capacity, let the system complete one full calibration cycle and check the \"Full Charge Capacity\" figure in Windows Battery Report (run \u003ccode\u003epowercfg \/batteryreport\u003c\/code\u003e from an elevated command prompt).\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409517674586,"sku":"BWCS-HPR147NB-1","price":81.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409517707354,"sku":"BWCS-HPR147NB-2","price":95.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409517740122,"sku":"BWCS-HPR147NB-3","price":106.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-HPR147NB-1.webp?v=1779579851"},{"product_id":"dell-precision-17-7770-replacement-battery-1155v-7600mah-li-polymer","title":"Dell Precision 17 7770 Replacement Battery 11.55V 87.78Wh 5JMD8","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDell Precision 17 7770 \/ 7670 — 11.55V Li-Polymer Replacement Battery (5JMD8)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 11.55V 7600mAh (87.78Wh) Li-Polymer battery replaces the internal cell in the Dell Precision 17 7770 and Precision 7670 Performance mobile workstations. It matches OEM part numbers 5JMD8, 965V4, and X9FTM. The connector, BMS handshake, and physical dimensions are direct matches to the factory unit.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePrecision 7770 and 7670 compatibility:\u003c\/strong\u003e\n    Both models share the same 11.55V three-cell architecture, identical connector pinout, and the same BIOS battery authentication protocol — which is why a single cell covers both platforms without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell on a Precision 7770 and confirmed the BIOS accepted the BMS handshake, charge current stepped correctly through CC\/CV phases, and protection circuits tripped at the expected low-voltage threshold.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install discharge cycle on the Precision 7770:\u003c\/strong\u003e\n    After fitting, run one full discharge to hibernate cutoff, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears in Dell SupportAssist after every cell swap.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting poor battery health immediately after replacement\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Precision 7770 stores historical charge data in EEPROM on the old cell. When a new cell is fitted, the BIOS reads no prior cycle data and flags the battery as degraded or unknown. This is a data gap, not a fault with the replacement cell. Running one full discharge-to-hibernate followed by a complete charge gives the fuel gauge IC a full swing to calibrate against. After two to three cycles, the BIOS health status updates to normal.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePrecision 7770 shutting down at 20–30% charge shown on screen\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge IC still holds calibration data from the old, degraded cell. The percentage readout is calculated against the previous cell's characteristics, so it reads 25% while the actual cell voltage has already hit the BMS cutoff threshold. The laptop shuts down because the hardware voltage floor is reached before the OS percentage reaches zero. Force a full discharge to hibernate on the new cell, charge to 100%, and repeat once more — this realigns the fuel gauge IC to the new cell's actual voltage curve.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409517871194,"sku":"BWCS-DEP177NB-1","price":81.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409517903962,"sku":"BWCS-DEP177NB-2","price":95.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409517936730,"sku":"BWCS-DEP177NB-3","price":106.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DEP177NB-1.webp?v=1779579852"},{"product_id":"asus-b3404cv-replacement-battery-1161v-5400mah-li-polymer","title":"Asus Vivobook 14 B3404CV Replacement Battery 11.61V 5400mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAsus Vivobook B3404CV \/ Chromebook CM34 — 11.61V Li-Polymer Replacement Battery (0B200-04010000)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 11.61V, 5400mAh (62.69Wh) Li-Polymer battery replaces the original cell in the Asus Vivobook B3404CV, CM3401FFA, and Chromebook CM34 Flip series. It matches OEM part numbers 0B200-04010000, 0B200-04310000, and C31N2205. The connector, BMS handshake, and physical dimensions are matched to these models exactly.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eB3404CV and CM34 series fitment:\u003c\/strong\u003e\n    These models share the same 11.61V three-cell Li-Polymer architecture, identical connector pinout, and the same BMS communication protocol — which is why one cell covers the full range. Swapping to a mismatched voltage rail will trigger an immediate BIOS rejection and the laptop will refuse to charge.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through a full charge-discharge cycle on the B3404CV platform. The BMS handshake completed without fault codes, charge current stepped down correctly at 80% and 95% thresholds, and the cell held steady voltage through a sustained CPU and display load test.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration on Asus BIOS:\u003c\/strong\u003e\n    After fitting this cell, run one full discharge to hibernate cutoff — do not force-shutdown — then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the false \"poor health\" warning that appears after every cell swap on these Vivobook and Chromebook CM34 platforms.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the B3404CV reports poor battery health immediately after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Asus BIOS stores learned capacity and cycle count data from the previous cell in its EEPROM. When a new cell is installed, that stored data no longer matches the actual cell chemistry, so the BIOS flags the battery as degraded. This is not a fault with the replacement cell — it is a calibration mismatch. Running the learn cycle (full discharge to hibernate, then uninterrupted charge to 100%) overwrites the stale EEPROM data. After one or two full cycles, the health indicator returns to normal.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLaptop shuts off at 20–30% shown on the fuel gauge after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge IC has not yet mapped the new cell's voltage-to-capacity curve. Under full CPU and display load, the cell voltage drops faster than the uncalibrated gauge predicts, and the system hits its low-voltage cutoff while the display still shows charge remaining. The fix is calibration — discharge fully to hibernate without interruption, then charge to 100% in one session. After two or three complete cycles, the gauge IC locks onto the correct curve and the early shutdowns stop.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409518100570,"sku":"BWCS-AUB340NB-1","price":68.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409518133338,"sku":"BWCS-AUB340NB-2","price":80.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409518166106,"sku":"BWCS-AUB340NB-3","price":88.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AUB340NB-1.webp?v=1779579852"},{"product_id":"asus-rc71l-nh001w-replacement-battery-1548v-5150mah-li-polymer","title":"Asus RC71L-NH001W Replacement Battery 15.48V 5150mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAsus RC71L-NH001W Series — 15.48V Li-Polymer Replacement Battery (C41N2208)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 15.48V 5150mAh (79.72Wh) Li-Polymer battery for the Asus RC71L-NH001W, RC71L-NH002W, RC71L-NH019W, RC71L-NR2301L, and related models. It replaces OEM part C41N2208 directly. Use this when the original cell no longer holds a charge or fails to register in Windows or the BIOS.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eRC71L series compatibility:\u003c\/strong\u003e\n    These RC71L variants share the same 15.48V four-cell Li-Polymer architecture, the same connector pinout, and the same BMS communication protocol — so one SKU covers the full lineup without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge, partial discharge, and full discharge on the RC71L platform. The BMS handshake completed correctly, charge current stepped down at 80% and 95% as expected, and the protection circuit tripped cleanly at low-voltage cutoff.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle calibration on RC71L:\u003c\/strong\u003e\n    After fitting this cell, run one full discharge until the laptop hibernates at cutoff, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health or capacity warning that appears after every cell swap on this platform.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting poor battery health immediately after fitting the C41N2208\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe RC71L stores cycle count, wear level, and rated capacity in EEPROM on the battery's embedded controller. When a new cell is installed, that EEPROM data doesn't match the BIOS's last recorded values, so the system flags the battery as degraded before a single charge completes. This is a data mismatch — not a fault with the replacement cell. Run one full discharge-to-hibernate followed by an uninterrupted charge to 100%, and the BIOS will rewrite its battery health baseline against the new cell's actual readings.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eRC71L shutting down between 20–30% charge shown on screen\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Windows fuel gauge IC calibrates against the old cell's discharge curve, not the new one. Under combined CPU and display load, the new cell's actual voltage drops faster than the gauge predicts — the system hits the low-voltage protection threshold while the percentage readout still shows 20–25%. The fix is two to three full discharge-and-recharge cycles so the fuel gauge IC can map the real discharge curve of the replacement cell. After calibration, the gauge should track closely and the laptop should not cut out above 5% remaining.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409518264410,"sku":"BWCS-AUR712NB-1","price":98.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409518297178,"sku":"BWCS-AUR712NB-2","price":116.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409518329946,"sku":"BWCS-AUR712NB-3","price":129.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AUR712NB-1.webp?v=1779579851"},{"product_id":"asus-vivobook-16x-k3605vc-replacement-battery-1155v-4300mah-li-polymer","title":"Asus VivoBook 16X K3605VC Replacement Battery 11.55V","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAsus VivoBook 16X K3605VC — 11.55V Li-Polymer Replacement Battery (0B200-04070000)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 11.55V, 4300mAh (49.67Wh) lithium-polymer cell replaces the original battery in the Asus VivoBook 16X K3605VC and its variants. It fits the K3605VC-AS96, K3605VC-N1004W, K3605VC-N1059W, and more than 60 additional K3605VC configurations. OEM part numbers covered: 0B200-04070000 and C31N2024.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eK3605VC platform compatibility:\u003c\/strong\u003e\n    All K3605VC variants share the same voltage rail, physical connector, and BMS handshake protocol. The 11.55V three-cell configuration is consistent across the entire production run, so one cell SKU covers the full range.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge and discharge cycles on the K3605VC platform. The BMS communicated correctly with the EC, reported accurate state-of-charge readings, and held voltage within spec across the full capacity range without triggering a protection cutoff.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration for the K3605VC:\u003c\/strong\u003e\n    After fitting this cell, run the laptop down to hibernate cutoff under normal load — open applications, active display — then charge uninterrupted to 100%. This forces the BIOS battery learn cycle to reset against the new cell's actual capacity curve and clears the inaccurate health warning that appears after every cell swap on this platform.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting poor battery health immediately after fitting a new K3605VC cell\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe K3605VC EC reads health data from EEPROM registers that carry over from the previous cell. When a new cell goes in, the BIOS compares the new cell's open-circuit voltage against stored cycle count and capacity data from the old pack — and flags a mismatch as degraded health. This is a calibration state, not a hardware fault. One full discharge-to-hibernate followed by an uninterrupted charge to 100% rewrites the learn cycle data. After two to three full cycles, the health readout normalises and the warning clears.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eVivoBook 16X shutting down at 20–30% charge shown on screen\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the cell voltage drops below the EC's cutoff threshold before the fuel gauge reaches zero — a voltage cliff under combined CPU and display load. The fuel gauge IC was calibrated to the old cell's discharge curve, so its percentage estimate is ahead of actual voltage. Running one complete discharge cycle to hibernate lets the gauge IC relearn the new cell's voltage-to-capacity relationship. After that cycle, the reported percentage and the actual cutoff voltage align — target a resting voltage of 11.1V or above at the 20% mark as confirmation the recalibration worked.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409518428250,"sku":"BWCS-AUK160NB-1","price":66.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409518461018,"sku":"BWCS-AUK160NB-2","price":78.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409518493786,"sku":"BWCS-AUK160NB-3","price":87.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AUK160NB-1.webp?v=1779579851"},{"product_id":"asus-replacement-battery-1152v-3550mah-li-polymer","title":"Asus B31N1902 Laptop Compatible Battery 11.52V 3550mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAsus B31N1902 — 11.52V Li-Polymer Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is an 11.52V, 3550mAh (40.9Wh) lithium-polymer battery built to replace the OEM B31N1902 cell in compatible Asus notebooks. It fits models that shipped with this part number from the factory. If your original battery no longer holds charge or your laptop drops off AC unexpectedly, this cell swaps in directly.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eB31N1902 platform fitment:\u003c\/strong\u003e\n    Asus uses the B31N1902 across a specific notebook line sharing the same 11.52V three-cell architecture, connector pinout, and BMS handshake protocol. Swapping a cell from a different voltage group — even a physically similar one — will cause the BMS to reject the pack or refuse charging entirely.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge and discharge cycles on B31N1902-compatible hardware. The BMS accepted the pack without fault codes, charge termination triggered correctly at capacity, and voltage held stable under combined CPU and display load without triggering a protection cutoff.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration step:\u003c\/strong\u003e\n    After fitting this cell, run the laptop down to hibernate-cutoff on battery only, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap on Asus notebooks.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting poor battery health immediately after fitting the new cell\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eWhen you replace the B31N1902, the BIOS still holds EEPROM data from the old, degraded cell. It compares the new cell's reported state against that stored history and flags a health warning — not because the new cell is faulty, but because the learn cycle hasn't run yet. One full discharge-to-hibernate followed by an uninterrupted charge to 100% clears this. After two or three full cycles, the BIOS recalibrates and the warning disappears.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLaptop shuts down at 20–30% charge shown on screen\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis is a voltage cliff, not a calibration issue. Under combined CPU and display load, the cell voltage drops faster than the fuel gauge IC can track — the system hits the low-voltage protection threshold before the displayed percentage reaches zero. The fix is calibration: fully discharge to hibernate-cutoff under normal use load, then charge to 100% without interruption. After two full calibration cycles, the fuel gauge IC maps the new cell's actual discharge curve and the early shutdowns stop.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409518592090,"sku":"BWCS-AUB192NB-1","price":49.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409518624858,"sku":"BWCS-AUB192NB-2","price":58.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409518657626,"sku":"BWCS-AUB192NB-3","price":64.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AUB192NB-1.webp?v=1779579851"},{"product_id":"asus-b2402cva-replacement-battery-1155v-4500mah-li-polymer","title":"Asus VivoBook B2402CVA Replacement Battery 11.55V 4500mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAsus VivoBook B2402CVA Series — 11.55V Li-Polymer Replacement Battery (0B200-04370000)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 11.55V, 4500mAh (51.98Wh) Li-Polymer battery replaces the original cell in the Asus VivoBook 14 B2402CVA and its variants, including the B2402CVA-EB0248, B2402CVA-XS74, and B2402FVA. It fits the physical bay, matches the OEM connector, and communicates with the BIOS over the standard SMBus protocol. Part numbers 0B200-04370000 and C31N2210 confirm compatibility across the B2402 line.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eB2402CVA series fitment:\u003c\/strong\u003e\n    Every model in this line runs the same three-cell Li-Polymer configuration on a shared 11.55V nominal rail. The connector pinout, BMS handshake protocol, and physical dimensions (200.20 × 104.10 × 7.40mm) are identical across all 18+ variants — one cell covers the entire range.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge and discharge cycles on a B2402CVA unit. The BMS handshake completed without error codes, the BIOS recognised the battery immediately, and the fuel gauge IC began tracking cell voltage from the first cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration on the B2402CVA:\u003c\/strong\u003e\n    After fitting this cell, run one full discharge down to hibernate-cutoff, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap on this platform.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting poor battery health immediately after fitting a new cell\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe B2402CVA stores charge history and health metrics in EEPROM on the battery's embedded controller — not in the cell itself. When a new cell goes in, that EEPROM history is blank or mismatched, so the BIOS flags the battery as degraded before it has run a single cycle. This is a data state, not a hardware fault. Run one complete discharge to hibernate-cutoff followed by an uninterrupted charge to 100%. After that learn cycle, the BIOS recalculates health against the new cell's actual voltage curve and clears the warning.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLaptop shuts down at 20–30% charge shown on screen\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge IC's calibration data still maps to the old, degraded cell. Under full CPU plus display load, the new cell's voltage curve does not match the stored model, so the system hits what it calculates as a safe cutoff well above true empty. It is not the cell failing — it is a calibration mismatch. Complete two full discharge-to-hibernate and charge-to-100% cycles. After the second cycle, the fuel gauge recalibrates to the new cell's actual discharge curve and the early shutdowns stop.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409518723162,"sku":"BWCS-AUB240NB-1","price":63.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409518755930,"sku":"BWCS-AUB240NB-2","price":75.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409518788698,"sku":"BWCS-AUB240NB-3","price":83.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AUB240NB-1.webp?v=1779579851"},{"product_id":"lg-14z970-replacement-battery-77v-7800mah-li-polymer","title":"LG 14Z970 Replacement Battery 7.7V 7800mAh LBR1223E","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eLG 14Z970 \/ Gram Series — 7.7V Li-Polymer Replacement Battery (LBR1223E)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 7.7V, 7800mAh (60.06Wh) lithium-polymer replacement battery for the LG 14Z970 and Gram ultrabook series. It fits the GRAM -G.AA52C, GRAM -G.AA53C, GRAM -G.AA75C, and over 150 additional Gram variants sharing the LBR1223E specification. The flat pouch cell matches the original footprint at 260.00 x 97.60 x 5.70mm.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eLG Gram platform compatibility:\u003c\/strong\u003e\n    These Gram models share the same 7.7V battery rail, LBR1223E connector pinout, and BMS handshake protocol — which is why one cell covers the full Gram lineup despite different model suffixes.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge, discharge, and BMS communication checks on the 14Z970 platform. The BMS authenticated the cell, reported state-of-charge correctly, and did not trigger fault codes.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration on the LG Gram:\u003c\/strong\u003e\n    After fitting, run the laptop on battery until it hibernates at low charge, then charge uninterrupted to 100% without interruption. This resets the BIOS battery learn cycle and clears the inaccurate health warning the Gram firmware throws after every cell swap.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting poor battery health immediately after fitting a new cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe LG Gram BIOS stores battery health data in EEPROM tied to the original cell's charge history. When you swap the cell, that stored data doesn't reset automatically — the BIOS reads the old profile and flags the new cell as degraded. This is firmware behaviour, not a fault with the replacement. Run one full discharge-to-hibernate cycle followed by a full uninterrupted charge to 100%, and the BIOS learn cycle will rewrite the EEPROM data against the new cell's actual capacity.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLaptop shuts down with 20–30% charge still showing on screen\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge IC hasn't calibrated against the new cell's voltage curve. The IC is still reading the old cell's discharge profile, so it misjudges where the voltage cliff sits — the battery hits minimum cell voltage under CPU and display load before the gauge reaches zero. It is not a defective cell. Run two to three full discharge-to-hibernate cycles, charging fully between each, and the fuel gauge IC will recalibrate. After calibration, confirm the cell rests at approximately 8.7V fully charged.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409518821466,"sku":"BWCS-LVR122NB-1","price":68.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409518854234,"sku":"BWCS-LVR122NB-2","price":80.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409518887002,"sku":"BWCS-LVR122NB-3","price":88.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-LVR122NB-1.webp?v=1779579852"},{"product_id":"lg-13z980-replacement-battery-77v-9350mah-li-polymer","title":"LG 13Z980 Replacement Battery 7.7V 9350mAh LBS1224E","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eLG 13Z980 \/ 13Z990 Series — 7.7V Li-Polymer Replacement Battery (LBS1224E)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 7.7V, 9350mAh (72Wh) lithium-polymer replacement battery for the LG 13Z980 and 13Z990 ultrabook series. It uses OEM part number LBS1224E and fits a wide range of 13Z990 variants including the AA33C and AA53C configurations. If your original cell is no longer holding charge or the OS reports degraded health, this replaces it directly.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003e13Z980 and 13Z990 platform fit:\u003c\/strong\u003e\n    Both models share the same 7.7V Li-Polymer cell format, connector pinout, and BMS communication protocol. The battery management system handshakes over the same SMBus line, so the same cell works across the full 13Z990 variant range without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge and discharge cycles on the 13Z990 platform. The BMS accepted the cell without rejection errors, charge terminated correctly at 100%, and the protection circuit responded accurately to load spikes during CPU stress testing.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration on the LG 13Z series:\u003c\/strong\u003e\n    After fitting this cell, run the laptop down to hibernate-cutoff under normal use, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap on this platform.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting poor battery health immediately after fitting the LBS1224E\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe LG 13Z series stores battery health data in EEPROM on the old cell. When a new cell is installed, the BIOS reads zero cycle history and flags it as degraded or unknown — this is a data mismatch, not a fault with the new cell. The fuel gauge IC has not yet calibrated against the new cell's actual chemistry. Run one complete discharge-to-hibernate cycle followed by a full uninterrupted charge to 100%. After two to three cycles, the health indicator normalises and the BIOS learn cycle completes.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLaptop shuts down at 20–30% shown on the LG 13Z990\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge IC is still calibrated against the old cell's voltage curve. The new LBS1224E cell has a different discharge profile, so the gauge misjudges remaining capacity and triggers shutdown early. It is not a cell defect — the IC needs to relearn the cutoff voltage, which sits at approximately 6.0V under load for this 7.7V nominal cell. Force a full discharge to hibernate, then charge uninterrupted to 100% twice in a row to let the gauge IC recalibrate against the new curve.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409518919770,"sku":"BWCS-LVS122NB-1","price":81.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409518952538,"sku":"BWCS-LVS122NB-2","price":95.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409518985306,"sku":"BWCS-LVS122NB-3","price":106.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-LVS122NB-1.webp?v=1779579852"},{"product_id":"lg-15z90n-replacement-battery-774v-8900mah-li-polymer","title":"LG 15Z90N Laptop Replacement Battery 7.74V 8900mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eLG 15Z90N Series — 7.74V Li-Polymer Replacement Battery (EAC64618302)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 7.74V, 8900mAh (68.89Wh) Li-Polymer replacement battery for the LG gram 15Z90N and related thin-and-light ultrabooks. It fits the 15Z90N, 15Z90P, 15Z990, 15ZT90P, and over a dozen additional gram variants that share the same battery bay and connector. The OEM part numbers are EAC64618302 and LBV7227E.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003e15Z90N and 15Z90P series compatibility:\u003c\/strong\u003e\n    These gram models share the same low-profile battery bay, 7.74V two-cell Li-Polymer architecture, and connector pinout. The BMS handshake uses the same EEPROM communication protocol across the series, so the same cell works across all listed variants without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge, discharge, and BMS communication checks on a 15Z90N unit. The BMS accepted the cell, voltage regulation held steady across load transitions, and the protection circuit tripped correctly at both over-voltage and under-voltage thresholds.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle calibration on the gram platform:\u003c\/strong\u003e\n    After fitting this cell, run one full discharge down to hibernate-cutoff, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears on the gram platform after every cell swap.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the LG gram 15Z90N shuts down at 20–30% after a battery swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe gram's fuel gauge IC stores charge-curve data calibrated to the original cell. A new cell with different internal resistance shifts the voltage-to-capacity curve, so the IC calls empty well before the cell actually is. Under full CPU and display load, the voltage sag is steeper, triggering an early shutdown that looks like a battery fault but is actually a calibration gap. Two to three full discharge-and-charge cycles give the fuel gauge IC enough data to recalibrate against the new cell's curve. After calibration, the reported percentage and actual cutoff voltage align.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting incorrect Wh rating after fitting a replacement cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Wh figure the BIOS displays comes from EEPROM data written to the battery's protection circuit, not from a live measurement. When the EEPROM-stored value doesn't match the actual cell chemistry, the BIOS reads the stored number and flags a mismatch or shows the wrong capacity entirely. This is a data discrepancy, not a fault with the cell. To clear it, enter the BIOS battery settings, run a full learn cycle, and confirm the reported value updates to match the installed cell's rated 68.89Wh.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409519018074,"sku":"BWCS-LBV722NB-1","price":68.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409519050842,"sku":"BWCS-LBV722NB-2","price":80.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409519083610,"sku":"BWCS-LBV722NB-3","price":88.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-LBV722NB_1.webp?v=1779579851"},{"product_id":"fujitsu-lifebook-e5413-replacement-battery-1544v-3900mah-li-polymer","title":"Fujitsu LIFEBOOK E5413 Replacement Battery 15.44V 3900mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eFujitsu LIFEBOOK E5413 — 15.44V Li-Polymer Replacement Battery (CP813249-01)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 15.44V, 3900mAh (60.22Wh) Li-Polymer battery replaces the original cell in the Fujitsu LIFEBOOK E5413 and several related models including the LIFEBOOK U7312 and E4412 series. It matches the OEM voltage rail and connector so the BIOS handshake completes on first boot. Capacity figures are sourced directly from product data — not estimated from third-party listings.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eLIFEBOOK E5413, U7312, and E4412 compatibility:\u003c\/strong\u003e\n    These models share the same 15.44V four-cell architecture, identical connector pinout, and the same BMS communication protocol — which is why one cell covers the full group. The BIOS expects a specific voltage range and EEPROM signature; this battery satisfies both without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge and discharge cycles on a LIFEBOOK platform. The BMS reported a full charge without triggering the BIOS health warning, and the fuel gauge IC accepted the new cell data within two calibration cycles.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration on LIFEBOOK firmware:\u003c\/strong\u003e\n    After fitting this battery, run one full discharge until the laptop hibernates, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting battery health as poor immediately after replacement\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe LIFEBOOK firmware stores charge history and cell data in an EEPROM register tied to the old battery. When a new cell goes in, that register still holds stale data from the degraded pack, so the BIOS flags the new battery as unhealthy before it has run a single cycle. This is a firmware state issue, not a fault with the replacement cell. Running one full discharge-to-hibernate followed by an uninterrupted charge to 100% triggers the BIOS learn cycle and rewrites the register. After two to three cycles the health indicator updates to reflect the actual cell condition.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLaptop shutting down at 20–30% charge shown on screen\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge IC's stored discharge curve no longer matches the new cell's actual voltage profile. The IC predicts shutdown too early because it is still referencing the old cell's degraded curve. Under full CPU and display load the voltage sag hits the cutoff threshold before the displayed percentage reaches zero. Perform two full calibration cycles — discharge to hibernate cutoff, then charge to 100% each time — and the fuel gauge IC will recalibrate against the new cell's actual voltage floor, typically around 14.0V at cutoff.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409519116378,"sku":"BWCS-FUE541NB-1","price":83.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409519149146,"sku":"BWCS-FUE541NB-2","price":99.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409519181914,"sku":"BWCS-FUE541NB-3","price":110.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-FUE541NB-1.webp?v=1779579905"},{"product_id":"hp-envy-17-ch0005ua-replacement-battery-1512v-3650mah-li-polymer","title":"HP Envy 17-CH0005UA Replacement Battery HSTNN-IB9T 15.12V","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eHP Envy 17-CH Series — 15.12V Li-Polymer Replacement Battery (HSTNN-IB9T)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a Li-Polymer replacement battery for the HP Envy 17-CH laptop series, including the Envy 17-CH0005UA and over 200 compatible models. It runs at 15.12V with a 3650mAh (55.19Wh) capacity. OEM part numbers covered include HSTNN-IB9T, TI04XL, M24420-1D1, and M24563-005.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eEnvy 17-CH series compatibility:\u003c\/strong\u003e\n    Every model in the 17-CH lineup shares the same 15.12V four-cell architecture, internal connector pinout, and BMS communication protocol. That common hardware base is why one cell fits the entire range, from the CH0005UA to the CH0010CA and CH0011NB.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through full charge and discharge on a CH-series board. The BMS handshake completed without error codes, charge current tapered correctly at the top-of-charge threshold, and the protection circuit tripped cleanly at the low-voltage cutoff.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle calibration on the 17-CH:\u003c\/strong\u003e\n    After fitting this cell, run the laptop unplugged until it hibernates on its own, then charge uninterrupted to 100% without using the machine. This lets the BIOS battery-learn cycle reset against the new cell's actual capacity and clears the inaccurate health warning that appears on every cell swap in this series.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting poor battery health immediately after fitting a new cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe HP Envy 17-CH stores battery state data in the BIOS. When a new cell goes in, that stored data reflects the worn-out history of the old pack — not the new one. The BIOS has not yet run a learn cycle against the fresh cell, so it flags health as poor or unknown. One full discharge-to-hibernate followed by an uninterrupted charge to 100% rewrites that data. After two to three cycles, the health indicator will update to reflect the actual condition of the new cell.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLaptop shuts down at 20–30% battery remaining shown on screen\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis is a voltage-cliff problem, not a fuel gauge error. Under full CPU and display load, the cell's terminal voltage drops faster than the fuel gauge IC can update — the system hits the hardware undervoltage cutoff while the OS still shows charge remaining. It happens most often in the first few cycles before the fuel gauge IC has calibrated against the new cell's discharge curve. Run two or three full discharge-to-hibernate cycles without interrupting. After that, the IC's internal model aligns with the actual cell, and the shutdowns stop.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409519280218,"sku":"BWCS-HPE177NB-1","price":88.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409519312986,"sku":"BWCS-HPE177NB-2","price":104.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409519345754,"sku":"BWCS-HPE177NB-3","price":115.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-HPE177NB-1.webp?v=1779579904"},{"product_id":"samsung-930qcj-replacement-battery-154v-4300mah-li-polymer","title":"Samsung 930QCJ Laptop Replacement Battery 15.4V 4300mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSamsung Galaxy Book FLEX 930QCJ \/ 950XCJ — 15.4V Li-Polymer Replacement Battery (AA-PBRN4ZU)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 15.4V, 4300mAh (66.22Wh) lithium-polymer battery for Samsung Galaxy Book FLEX laptops. It fits the 930QCJ, 930XCJ, 950XCJ, Galaxy Book FLEX NP950QCG-K01HK, and over 38 additional Samsung notebook variants sharing the AA-PBRN4ZU specification. If your original cell no longer holds charge or the laptop reports battery health as poor, this is the direct swap.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eGalaxy Book FLEX platform fit:\u003c\/strong\u003e\n    These models share a common 15.4V power rail, the same BMS handshake protocol, and an identical physical connector pinout — which is why one cell covers the full 930\/950 series. The BMS communicates state-of-charge data back to the BIOS over the SMBus line; the replacement cell carries that same communication stack.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran charge and discharge cycles on this cell against a 930XCJ board. The BMS held voltage within spec across the full range and the protection circuit triggered correctly at low-cell threshold, stopping discharge before damage occurred.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle reset after installation:\u003c\/strong\u003e\n    After fitting this cell, run the laptop down to hibernate cutoff — do not interrupt — then charge uninterrupted to 100%. This forces the BIOS to run its battery learn cycle against the new cell and clears the inaccurate health warning that appears after every cell swap on this platform.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Galaxy Book FLEX BIOS reports poor health immediately after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Samsung BIOS reads health data from EEPROM registers stored in the original cell's fuel gauge IC. When a new cell goes in, those registers contain factory defaults, not real-world cycle data — so the BIOS flags the battery as degraded or unknown before any learning has occurred. This is a firmware read issue, not a fault with the replacement cell. Running one full discharge-to-hibernate then an uninterrupted charge to 100% lets the BIOS rewrite those registers against the actual new cell chemistry. After one or two complete cycles the health status normalises.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLaptop shuts down at 20–30% shown on the new cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge IC has not yet calibrated against the new cell's voltage curve. The OS reads a fuel gauge estimate, not a live cell voltage — so it shows 25% while the cell is already below the safe discharge floor under full CPU and display load. The laptop cuts power to protect the cell before the displayed percentage reaches zero. Fix this by completing two full discharge-to-hibernate cycles followed by full uninterrupted charges. After calibration, the gauge tracks the actual voltage curve and shutdowns stop occurring above 5%.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409519444058,"sku":"BWCS-SMF950NB-1","price":88.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409519476826,"sku":"BWCS-SMF950NB-2","price":104.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409519509594,"sku":"BWCS-SMF950NB-3","price":115.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SMF950NB-1.webp?v=1779579941"},{"product_id":"panasonic-fz-55a-replacement-battery-108v-6200mah-li-ion","title":"Panasonic FZ-VSD55151W Toughbook FZ-55A Replacement Battery 10.8V 6200mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003ePanasonic FZ-55A Series — 10.8V Li-ion Replacement Battery (FZ-VSD55151W)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 10.8V 6200mAh (66.96Wh) Li-ion battery replaces the OEM cell in the Panasonic Toughbook FZ-55A rugged laptop. It fits the FZ-55A, FZ-55A0601VM, FZ-55A8601VM, FZ-55B, and 22 additional FZ-55 variants that share the same connector and BMS handshake. Part numbers FZ-VSD55151W and FZ-VZSU1HU both apply to this battery slot.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFZ-55 series compatibility:\u003c\/strong\u003e\n    Every model in the FZ-55 line uses the same 10.8V three-cell Li-ion architecture with an identical connector pinout and BMS communication protocol. The BIOS expects specific EEPROM data over that bus — this cell carries the correct data to pass the handshake without triggering an \"unknown battery\" flag.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell on an FZ-55A under combined CPU and display load. The BMS held voltage above the 9.9V cutoff threshold throughout the discharge curve and reported state-of-charge correctly to the OS fuel gauge IC after two full cycles.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle calibration on the FZ-55A:\u003c\/strong\u003e\n    After fitting this battery, run one full discharge to hibernate-cutoff, then charge uninterrupted to 100%. This resets the Toughbook BIOS battery learn cycle and clears the inaccurate health warning that appears immediately after any cell swap on this platform.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting poor battery health immediately after fitting a new cell\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Toughbook FZ-55A BIOS reads cycle count and health data stored in the outgoing cell's EEPROM. When a new cell arrives with a fresh EEPROM, the BIOS flags it as degraded or unknown because the learned parameters don't match its internal model yet. This is not a fault with the replacement cell. Run the BIOS battery recalibration routine — discharge fully to hibernate-cutoff, then charge to 100% without interruption. After one or two complete cycles the health indicator will update to reflect actual cell condition.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eToughbook shutting down at 20–30% charge shown on screen\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the cell voltage drops below the platform's safe operating floor under full CPU plus display load before the fuel gauge IC registers empty. On the FZ-55A that floor sits around 10.2V under heavy draw — the BMS trips and forces a shutdown even though the gauge still shows capacity remaining. The fuel gauge IC needs calibration cycles against the new cell chemistry before its readings align with actual voltage. Run two full discharge-to-cutoff and charge-to-100% cycles and the shutdown threshold will track correctly.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409519575130,"sku":"BWCS-PNZ550NB-1","price":228.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 2 Year","offer_id":43409519607898,"sku":"BWCS-PNZ550NB-2","price":272.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 3 Year","offer_id":43409519640666,"sku":"BWCS-PNZ550NB-3","price":304.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-PNZ550NB-1.webp?v=1779579941"},{"product_id":"lenovo-ideapad-100s-14ibr-replacement-battery-76v-4100mah-li-polymer","title":"Lenovo IdeaPad 100S-14IBR Compatible Battery 7.6V 4100mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eLenovo IdeaPad 100S-14IBR — 7.6V Li-Polymer Replacement Battery (0813002)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 7.6V, 4100mAh (31.16Wh) Li-Polymer battery for the Lenovo IdeaPad 100S-14IBR 14-inch notebook. It replaces OEM part numbers 0813002, 5B10K65026, and NC140BW1-2S1P. Fit covers the 80R9 series variants, including the 80R9002WGE and 80R90031PH builds.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eIdeaPad 100S-14IBR 80R9 series compatibility:\u003c\/strong\u003e\n    All 80R9 variants share the same 7.6V two-cell Li-Polymer architecture, identical connector pinout, and the same BMS handshake protocol. Swapping between sub-models carries no electrical risk — the BMS negotiation is identical across the full 80R9 range.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge, discharge, and suspend-resume on an IdeaPad 100S-14IBR unit. The BMS accepted the cell without fault codes, and charge current ramped normally from bulk to trickle at the correct voltage threshold.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install recalibration step:\u003c\/strong\u003e\n    After fitting, run the laptop down to hibernate cutoff on battery only, then charge uninterrupted to 100%. This forces the BIOS battery learn cycle to reset against the new cell and clears the inaccurate health warning that appears after every cell swap.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting poor battery health immediately after replacement\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe IdeaPad 100S-14IBR stores battery health data in EEPROM on the old cell. When a new cell goes in, the BIOS reads stale EEPROM values and flags the battery as degraded before it has run a single cycle. This is a data mismatch, not a cell fault. Running one full discharge-to-hibernate followed by a full uninterrupted charge resets the learn cycle. After two to three full cycles, the BIOS recalculates health against real cell data and the warning clears.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLaptop shutting down at 20–30% charge shown on screen\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge IC has not yet calibrated against the new cell's actual voltage curve. The gauge reports 25% remaining, but the cell voltage has already dropped below the minimum load threshold under combined CPU and display draw. The laptop shuts down to protect the cell — not because the battery is faulty. Run two full discharge-to-hibernate cycles without interruption. After calibration, the fuel gauge tracks the real voltage cliff and the OS percentage reading aligns with actual charge state.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409519706202,"sku":"BWCS-LNP148NB-1","price":83.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409519738970,"sku":"BWCS-LNP148NB-2","price":99.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409519771738,"sku":"BWCS-LNP148NB-3","price":110.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-LNP148NB-1.webp?v=1779579940"},{"product_id":"toshiba-dynabook-tecra-x50-f-replacement-battery-114v-4050mah-li-polymer","title":"Toshiba Dynabook Tecra X50-F Compatible Battery PA5353U-1BRS 11.4V","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eToshiba Dynabook Tecra X50-F Series — 11.4V Li-Polymer Replacement Battery (PA5353U-1BRS)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is an 11.4V, 4050mAh (46.17Wh) Li-Polymer battery for the Toshiba Dynabook Tecra X50-F series notebook. It replaces the OEM part PA5353U-1BRS and restores cordless operation to the Tecra X50-F, X50-F-11E, X50-F-11F, X50-F-127, and over 19 additional variants. Voltage and connector match the original cell exactly.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eTecra X50-F series fit:\u003c\/strong\u003e\n    All X50-F variants share the same 11.4V three-cell Li-Polymer configuration, connector pinout, and BMS handshake protocol. One replacement cell covers the full range without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge and discharge cycles on a Tecra X50-F unit. The BMS accepted the new cell without error flags, charge current ramped correctly, and the protection circuit triggered at the expected low-voltage cutoff threshold.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration on the Tecra X50-F:\u003c\/strong\u003e\n    After fitting, run the laptop on battery until it hibernates at cutoff — do not interrupt. Then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap on Dynabook firmware.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting poor battery health immediately after fitting the PA5353U-1BRS\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Dynabook BIOS reads health status from EEPROM data stored in the outgoing cell, not the physical chemistry of the new one. When a replacement cell arrives, the BIOS has no learned baseline yet and flags the battery as poor or unknown. This is a fuel gauge calibration gap, not a fault with the replacement. Run one full discharge-to-hibernate cycle followed by an uninterrupted charge to 100% and the BIOS will re-establish its learn cycle. After two to three full cycles, the health indicator will reflect the actual cell state.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eTecra X50-F shutting down abruptly at 20–30% charge shown on screen\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge IC has not yet calibrated against the new cell's discharge curve. The gauge reports 20–30% remaining while the actual cell voltage has already hit the BMS cutoff threshold under CPU and display load. The mismatch between displayed percentage and real voltage causes a sudden shutdown with no low-battery warning. Run a full discharge-to-hibernate cycle, then charge to 100% without interruption — this anchors the fuel gauge IC to the new cell's actual voltage floor and corrects the reading. The cutoff trigger on this cell sits at approximately 9V under load.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409519870042,"sku":"BWCS-TOX500NB-1","price":88.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409519902810,"sku":"BWCS-TOX500NB-2","price":104.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409519935578,"sku":"BWCS-TOX500NB-3","price":115.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-TOX500NB-1.webp?v=1779579941"},{"product_id":"toshiba-satellite-p20w-c-replacement-battery-114v-3600mah-li-polymer","title":"Toshiba Satellite P20W-C Replacement Battery 11.4V PA5242U-1BRS","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eToshiba Satellite P20W-C Series — 11.4V Li-Polymer Replacement Battery (PA5242U-1BRS)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is an 11.4V, 3600mAh (41.04Wh) Li-Polymer battery for the Toshiba Satellite P20W-C convertible laptop range. It fits the Satellite Radius 12 P20W-C, P20W-C-103, P20W-C-104, and related models sharing the PA5242U-1BRS part number. The slim 6.30mm profile matches the original cell geometry so the back panel seats without force.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSatellite P20W-C compatibility:\u003c\/strong\u003e\n    These models share a common 11.4V three-cell Li-Polymer architecture, the same connector pinout, and an identical BMS handshake protocol — which is why one part number covers the full P20W-C and Radius 12 sub-range.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell on a P20W-C unit and confirmed the BMS accepted the pack without fault codes, charge negotiation completed through to 100%, and the protection circuit tripped correctly at low-voltage cutoff under a simulated load cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap calibration on P20W-C:\u003c\/strong\u003e\n    After fitting, run one full discharge down to hibernate cutoff, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health or capacity warning that appears after a cell swap on this platform.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting poor battery health immediately after fitting a new cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe P20W-C BIOS reads health data from EEPROM registers written by the original factory cell. When a replacement cell arrives, those registers either carry default values or differ from what the firmware expects — so the system flags the battery as degraded before it has ever been cycled. This is a firmware state issue, not a fault with the replacement cell. Running one complete discharge-to-hibernate and full recharge gives the BIOS enough data to rewrite its health estimate against the new cell's actual chemistry. After two to three full cycles the reported health figure stabilises.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLaptop shuts down at 20–30% charge shown on screen\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge IC has not yet calibrated against the new cell's discharge curve. The IC was tuned to the old cell's voltage profile and calls the cutoff point too early — the percentage shown does not match actual remaining charge. Under combined CPU and display load the voltage sag is steep enough that the protection circuit cuts power before the gauge reaches zero. Force a slow, full discharge with screen brightness at maximum and no power-saving mode active, then charge to 100% without interruption. Repeat this twice and the fuel gauge IC recalibrates to the correct voltage cliff point for this cell.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409520001114,"sku":"BWCS-TOR103NB-1","price":103.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409520033882,"sku":"BWCS-TOR103NB-2","price":123.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409520066650,"sku":"BWCS-TOR103NB-3","price":137.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-TOR103NB-1.webp?v=1779579941"},{"product_id":"samsung-galaxy-book2-pro-13-replacement-battery-1544v-4000mah-li-polymer","title":"Samsung Galaxy Book2 Pro 13 Replacement Battery AA-PBMN4MR 15.44V","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSamsung Galaxy Book2 Pro 13 — 15.44V Li-Polymer Replacement Battery (AA-PBMN4MR)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 15.44V, 4000mAh (61.76Wh) Li-Polymer battery for the Samsung Galaxy Book2 Pro 13 ultrabook. It replaces part number AA-PBMN4MR and fits the NP930XED series including KA1BE, KA1CL, KA1DE, and over 124 additional regional variants. Install this when the original cell no longer holds a usable charge or the system shuts down unexpectedly under load.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eNP930XED series fit:\u003c\/strong\u003e\n    All NP930XED variants share the same 15.44V battery rail, connector pinout, and BMS handshake protocol. A single cell SKU covers the full regional lineup because Samsung locked the hardware spec across those production runs.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge and discharge cycles on a Galaxy Book2 Pro 13 unit. The BMS negotiated correctly, charge current ramped as expected, and the protection circuit tripped at the correct low-voltage threshold without spurious cutoffs.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBIOS learn cycle after install:\u003c\/strong\u003e\n    After fitting this cell, run the laptop down to hibernate cutoff on battery only — no AC — then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap on the NP930XED platform.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eGalaxy Book2 Pro 13 shutting down at 20–30% after a battery swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThis is a voltage cliff problem, not a capacity fault. Under combined CPU and display load, the new cell hasn't yet been mapped by the fuel gauge IC, so the system reads available voltage inaccurately and triggers a protective shutdown before the cell is actually depleted. The BIOS battery learn cycle described in the care tip above resolves this in one to two full discharge-charge passes. After calibration, the fuel gauge tracks the new cell's discharge curve correctly and shutdowns at low-but-non-zero percentages stop.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting 0% or \"unknown\" battery immediately after installing a new cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe EEPROM data written by the old cell persists in the system's battery management registers after a swap. The firmware briefly sees a mismatch between the stored cell profile and the new cell's reported parameters, which surfaces as 0% or an \"unknown device\" flag in both the BIOS and Windows battery status. This is not a fault with the replacement cell. Boot into the Samsung Battery Manager or Windows Settings \u0026gt; Power \u0026amp; Battery, confirm the cell is detected at any non-zero voltage, then complete one full discharge-to-hibernate and full recharge cycle to rewrite the register values to the new cell's baseline.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409520197722,"sku":"BWCS-SMB360NB-1","price":88.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409520230490,"sku":"BWCS-SMB360NB-2","price":104.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409520263258,"sku":"BWCS-SMB360NB-3","price":115.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SMB360NB-1.webp?v=1779579941"},{"product_id":"asus-rog-ally-2023-rc71l-nr2301l-replacement-battery-1548v-2500mah-li-polymer","title":"Asus ROG Ally 2023 RC71L Replacement Battery 15.48V 2500mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAsus ROG Ally (2023) RC71L NR2301L — 15.48V Li-Polymer Replacement Battery (C41N2208)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 15.48V, 2500mAh (38.7Wh) Li-Polymer cell built to the C41N2208 specification for the Asus ROG Ally (2023) handheld gaming console. It fits the RC71L and NR2301L variants. Swap it in when the original cell no longer holds enough charge to sustain portable play sessions.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eRC71L and NR2301L compatibility:\u003c\/strong\u003e\n    Both variants run the same 15.48V four-cell series configuration with the C41N2208 connector and BMS pinout. The cell capacity and protection circuit thresholds are identical across both, so one replacement covers either board revision without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran the C41N2208 through charge and discharge cycles on the ROG Ally platform. The BMS accepted the cell without fault flags, balanced correctly across all four cells, and the protection circuit tripped cleanly at the expected low-voltage cutoff threshold.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install recalibration on the ROG Ally:\u003c\/strong\u003e\n    After fitting this cell, run one full discharge until the device hibernates, then charge uninterrupted to 100%. The ROG Ally's fuel gauge IC needs this cycle to build an accurate capacity map against the new cell. Skipping it causes the OS to show wildly inaccurate charge percentages for the first several sessions.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the ROG Ally shuts down at 20–30% after a battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe ROG Ally pulls hard on the CPU and GPU simultaneously during demanding titles. Under that combined load, a new cell that hasn't been calibrated hits a steep voltage drop earlier than the fuel gauge expects. The system reads the voltage cliff as a critical battery event and forces shutdown even though the displayed percentage looks safe. Running two full calibration cycles resolves this by teaching the fuel gauge IC where the actual voltage floor sits under load.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting battery health as poor immediately after fitting the C41N2208\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eWhen you swap the physical cell, the EEPROM data stored from the old battery stays cached in the system. The BIOS compares the new cell's charge state against that stale EEPROM profile and flags a health mismatch. This is a data artefact, not a fault with the replacement cell. Clear it by running the full discharge-to-hibernate then uninterrupted charge cycle — the BIOS battery learn cycle overwrites the old EEPROM values and the health warning disappears.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409520394330,"sku":"BWCS-AUR710NB-1","price":98.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409520427098,"sku":"BWCS-AUR710NB-2","price":116.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409520459866,"sku":"BWCS-AUR710NB-3","price":129.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AUR710NB_1.webp?v=1779579904"},{"product_id":"medion-akoya-e14303-ns14ar-replacement-battery-1155v-3850mah-li-polymer","title":"Medion Akoya E14303 456484-3S Replacement Battery 11.55V 3850mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eMedion Akoya E14303 \/ E15303 Series — 11.55V Li-Polymer Replacement Battery (456484-3S)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is an 11.55V, 3850mAh (44.47Wh) Li-Polymer replacement battery for the Medion Akoya E14303 (NS14AR). It also fits the Akoya E14304, E15303, and E15309, along with seven additional Akoya variants sharing the same 456484-3S cell configuration. It restores unplugged operation to laptops where the original cell has degraded or failed to hold charge.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eAkoya NS14AR \/ NS15AR \/ NS15AL platform fit:\u003c\/strong\u003e\n    These Akoya models share a common 3-cell Li-Polymer architecture, the same 456484-3S part number, and an identical flat-pack connector with matching BMS handshake signals. Swapping between variants in this group does not require firmware changes or connector adapters.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge, full discharge to BMS cutoff, and a second full charge on an NS14AR unit. The BMS accepted the new cell without a protection trip, and the charge controller progressed normally through all charge stages to 100%.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration on NS14AR:\u003c\/strong\u003e\n    After fitting, run one full discharge until the laptop hibernates on its own, then charge uninterrupted to 100%. This forces the BIOS battery learn cycle to reset against the new cell and clears the inaccurate health warning that appears in almost every Akoya battery swap.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting battery health as poor immediately after replacement\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eMedion Akoya laptops store battery health data in EEPROM on the battery controller. When a new cell goes in, the BIOS reads stale EEPROM values from the old cell's charge history and flags the replacement as degraded. This is a data mismatch, not a fault with the new battery. Running one full discharge-to-hibernate cycle followed by an uninterrupted full charge resets the learn cycle and writes fresh EEPROM baseline data. After that cycle, the health status should clear to normal.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLaptop shuts down abruptly at 20–30% charge shown on screen\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge IC has not yet calibrated against the new cell's discharge curve. The percentage shown on screen does not match the actual cell voltage, so the laptop hits BMS cutoff before the OS sees 0%. It is most noticeable under combined CPU and display load, where voltage sag accelerates the drop. Run two to three full discharge-and-charge cycles without interruption. By the third cycle, the fuel gauge IC recalibrates and the displayed percentage aligns with the actual remaining capacity — shutdowns at false percentages stop.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409520558170,"sku":"BWCS-MDK164NB-1","price":76.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409520590938,"sku":"BWCS-MDK164NB-2","price":90.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409520623706,"sku":"BWCS-MDK164NB-3","price":101.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-MDK164NB-1.webp?v=1779579940"},{"product_id":"hp-nnotebook-x2-10-p043tu-replacement-battery-77v-4200mah-li-polymer","title":"HP Pavilion x2 10 Compatible Battery 7.7V 4200mAh SW02XL","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eHP Notebook X2 10-P043TU — 7.7V Li-Polymer Replacement Battery (SW02XL)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 7.7V, 4200mAh (32.34Wh) Li-Polymer cell replaces the original SW02XL battery in the HP Pavilion x2 10 series hybrid tablet-laptop. It fits the 10-P043TU along with the 10-P000NA, 10-P000ND, 10-P000NF, and 167+ additional x2 10 variants. The connector, BMS handshake, and physical form factor match OEM spec across the full P-series lineup.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003ex2 10 P-series compatibility:\u003c\/strong\u003e\n    Every model in this lineup runs the same 7.7V two-cell Li-Polymer configuration with a shared BMS communication protocol. HP standardised the SW02XL form factor across the P-series so one cell covers the full range — the HSTNN-IB7N and HSTNN-LB7N designations refer to the same physical pack with different regional part codes.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell on a 10-P series unit and confirmed the BMS completed handshake without fault codes. Charge acceptance ran clean from 0% to 100% with no mid-cycle cutoff. The EEPROM read-back matched expected Wh values after two full calibration cycles.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration — x2 10 hybrid:\u003c\/strong\u003e\n    After fitting this cell, run the tablet side down to hibernate-cutoff under normal load — screen on, a few browser tabs open. Then charge uninterrupted to 100% without disconnecting. This forces the fuel gauge IC to re-baseline against the new cell and clears the inaccurate health warning the BIOS throws after every cell swap.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting poor battery health immediately after swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe HP x2 10 BIOS stores learned battery data in EEPROM tied to the original cell. When a new cell goes in, that stored data no longer matches the actual chemistry, so the BIOS flags the pack as degraded or unknown — even on a brand-new replacement. This is a firmware calibration issue, not a cell fault. Run one full discharge to hibernate-cutoff followed by a full uninterrupted charge to 100%. After two cycles, the fuel gauge IC re-learns the cell's actual capacity curve and the health warning clears.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eTablet shutting down at 20–30% charge shown on screen\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge IC has not yet calibrated to the new cell's voltage curve. The x2 10 runs a combined CPU-plus-display load during active use that pulls enough current to expose a steep voltage cliff in an uncalibrated cell — the BMS interprets that voltage drop as empty and triggers a shutdown even though capacity remains. The fix is the same calibration cycle: discharge fully to hibernate, charge straight to 100% without interruption, and repeat once more. After two cycles, the OS reading will track actual cell state down to around 3.0V per cell before cutoff.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409520722010,"sku":"BWCS-HNX210NB-1","price":63.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409520754778,"sku":"BWCS-HNX210NB-2","price":75.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409520787546,"sku":"BWCS-HNX210NB-3","price":83.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-HNX210NB-1.webp?v=1779579905"},{"product_id":"hp-envy-x360-13-bf0000ci-replacement-battery-77v-8200mah-li-polymer","title":"HP ENVY X360 13-BF0000CI Replacement Battery 7.7V 8200mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eHP ENVY x360 13-BF Series — 7.7V Li-Polymer Replacement Battery (HSTNN-OB2Y)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 7.7V 8200mAh (63.14Wh) Li-Polymer replacement battery for the HP ENVY x360 13-bf convertible laptop line. It slots into the 13-bf0000ci, 13-bf0000ne, 13-bf0000ni, 13-bf0000nia, and over 189 additional bf-series variants. Cross-reference OEM part numbers HSTNN-OB2Y, M89926-1D1, M89926-AC1, M90073-005, TPN-IB0O, or WF04XL before ordering.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003e13-bf series platform fit:\u003c\/strong\u003e\n    All 13-bf variants share the same 7.7V battery rail, physical connector pinout, and BMS handshake protocol. The same cell covers the full sub-series because HP did not change the battery spec across these board revisions.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell on a 13-bf unit under combined CPU and display load. The BMS held charge through a full discharge cycle, transitioned to hibernate cutoff cleanly, and accepted a full charge without tripping the over-voltage protection on the way back up.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle calibration after install:\u003c\/strong\u003e\n    After fitting this cell, discharge the laptop fully until it hibernates, then charge it to 100% without interruption. This forces the BIOS battery learn cycle to reset against the new cell's actual capacity and clears the inaccurate health warning that appears immediately after every cell swap.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the ENVY x360 13-bf shuts down at 20–30% after a battery swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe fuel gauge IC in the 13-bf uses stored discharge curve data from the old cell to predict remaining capacity. When a new cell goes in, that data no longer matches the actual chemistry, so the IC miscalculates the voltage cliff. Under combined CPU boost and display load, the system sees a voltage drop it interprets as empty and forces an immediate shutdown — even though the cell still has real capacity left. Running two to three full discharge-to-hibernate and charge-to-100% cycles lets the fuel gauge IC rebuild its model against the new cell. After those cycles, the gauge tracks accurately and the early shutdowns stop.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting battery health as poor immediately after fitting a new cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe BIOS reads health data from the battery's EEPROM, which is pre-populated at the factory with rated cycle count and Wh values. On a brand-new cell, the BIOS compares that EEPROM data against its stored wear baseline and flags a mismatch as poor health. This is a read-order issue, not a fault with the cell. Run one full discharge to hibernate cutoff, then charge uninterrupted to 100%. On the next boot, the BIOS battery learn cycle completes and the health status clears to normal.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409520885850,"sku":"BWCS-HWF360NB-1","price":83.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409520918618,"sku":"BWCS-HWF360NB-2","price":99.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409520951386,"sku":"BWCS-HWF360NB-3","price":110.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-HWF360NB-1.webp?v=1779579940"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/collections\/BW-CS-LVX130SL-5.webp?v=1780880769","url":"https:\/\/batteryweb.com\/collections\/notebook-laptop.oembed?page=146","provider":"BatteryWeb","version":"1.0","type":"link"}