{"title":"ASUS Replacement Batteries","description":"\u003cp class=\"PDq2pG_selectionAnchorContainer\"\u003eFind replacement batteries for ASUS laptops, notebooks, tablets, and other portable devices. BatteryWeb offers battery options for many ASUS product families, including \u003cstrong\u003eASUS VivoBook, ZenBook, ExpertBook, ROG, TUF Gaming, Chromebook, Transformer, and ASUS tablets\u003c\/strong\u003e.\u003cspan class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eFor everyday work and home use, our selection includes batteries for \u003cstrong\u003eVivoBook and VivoBook S Series\u003c\/strong\u003e, while \u003cstrong\u003eZenBook and ZenBook Flip\u003c\/strong\u003e models provide options for ASUS thin and convertible laptops. Business users can find replacement batteries for \u003cstrong\u003eExpertBook\u003c\/strong\u003e systems, while gamers can look for batteries made for \u003cstrong\u003eROG and TUF Gaming\u003c\/strong\u003e laptops.\u003c\/p\u003e\n\u003cp\u003eASUS uses different battery designs across its product range. Depending on the model, you may find \u003cstrong\u003elithium-ion and lithium-polymer battery packs\u003c\/strong\u003e with different voltages, capacities, cell configurations, connectors, and physical dimensions. Some ASUS batteries are also identified by specific \u003cstrong\u003ebattery part numbers or model numbers\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eYou can search for a replacement battery using your \u003cstrong\u003eASUS laptop model, battery part number, battery model, voltage, capacity, or original battery specifications\u003c\/strong\u003e. This is helpful when the original battery has lost capacity, does not hold a charge, or needs to be replaced.\u003c\/p\u003e\n\u003cp\u003eOur ASUS battery selection covers devices such as \u003cstrong\u003eVivoBook laptops, ZenBook notebooks, ExpertBook business laptops, ROG gaming laptops, TUF Gaming laptops, Chromebooks, Transformer devices, and ASUS tablets\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eBefore ordering, compare the \u003cstrong\u003ebattery part number, voltage, capacity, connector, cell configuration, and dimensions\u003c\/strong\u003e with your original battery. Matching these specifications is important for proper compatibility.\u003c\/p\u003e\n\u003cp\u003eBatteryWeb provides replacement battery options for a wide range of ASUS models, helping you find the right battery for your laptop or portable device.\u003c\/p\u003e","products":[{"product_id":"asus-l3000dl3d-replacement-battery-3v-200mah-lithium","title":"Asus L3000D CMOS Replacement Battery 3V 200mAh Lithium","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAsus L3000D \/ L3800 \/ M2400 Series — 3V Lithium CMOS Backup Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3V 200mAh lithium coin cell that replaces the CMOS\/RTC backup battery on the Asus L3000D(L3D), L3800, M2400, and M2400E (M2E) laptop motherboards. It keeps system settings, BIOS configuration, and the real-time clock alive when the laptop is off or unplugged. When this cell drops below the 2.8V retention threshold, the board loses all stored state on every power cycle.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eL3000D \/ L3800 \/ M2400 platform fit:\u003c\/strong\u003e\n    These models share the same motherboard socket format and RTC circuit voltage rail at 3V, so a single cell spec covers all of them. The connector and physical footprint — 26.25 × 20.12 × 4.60mm — match the factory installation point without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We confirmed cell output at 3.0V under CMOS load and verified the BMS circuit on the motherboard accepted the cell without a checksum fault on first boot.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install clock setup:\u003c\/strong\u003e\n    After fitting this cell, enter BIOS immediately and set the correct date and time, then save and exit. The RTC circuit is powered by this cell, and any gap in supply resets the clock to a factory default — that correction must be made manually after every swap.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS clock resetting to 2000 after every power cycle\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eWhen the L3000D boots to January 1, 2000 on every cold start, the CMOS cell has dropped below the 2.8V minimum retention voltage. The RTC circuit draws a small continuous current from the cell to hold the clock and NVRAM state — once voltage falls below threshold, the circuit loses state the moment mains power is removed. A depleted cell often still reads close to 3V on a multimeter at no load, which makes it look good. Replacing the cell and resetting the clock in BIOS resolves this immediately.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eCMOS checksum error on boot after fitting a new coin cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA checksum error on first boot with a new cell usually means the BIOS found the CMOS contents in an invalid state — which is expected after a full cell swap, not a sign of a faulty replacement. The board compares stored checksum data against current CMOS contents; since the cell swap interrupted supply, everything is zeroed. Enter BIOS setup, load optimised defaults, set the date and time, then save and exit. The error will not reappear on subsequent boots once valid settings are written back to CMOS.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43339833475162,"sku":"BWCS-DED610BU-1","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43339833507930,"sku":"BWCS-DED610BU-2","price":30.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43339833540698,"sku":"BWCS-DED610BU-3","price":32.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DED610BU-1.webp?v=1778366787"},{"product_id":"asus-eee-transformer-tf101-replacement-battery-3v-40mah-lithium","title":"Asus Eee Transformer TF101 CMOS Battery 3V 40mAh 110410","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAsus Eee Transformer TF101 — 3V Lithium Replacement Battery (110410)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3V, 40mAh lithium cell is the CMOS backup battery for the Asus Eee Transformer TF101 and Eee Pad Transformer series tablets. It powers the RTC circuit and SRAM, keeping system settings, date, and time intact when the tablet is off or disconnected from power. When this cell drops below retention voltage, the tablet loses its clock and configuration on every power cycle.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eTF101 and Eee Pad Transformer series fit:\u003c\/strong\u003e\n    These models share the same motherboard RTC circuit and connector layout. The cell uses OEM part numbers 110410, 0623.11, and 1226.11 across production runs — the electrical spec is identical across all variants.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We confirmed the cell holds 3V open-circuit and that the RTC circuit latched correctly after installation. The SRAM retained settings through a full mains-disconnect cycle with no checksum errors.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-installation RTC correction:\u003c\/strong\u003e\n    After swapping the cell, enter the tablet's system settings and manually set the correct date and time, then save. The CMOS cell powers the RTC circuit, and any interruption during the swap resets the clock to a default value — this step is required to resync the system clock correctly.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS clock resetting to a default date after every power cycle\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe RTC circuit on the TF101 motherboard relies on this lithium cell to maintain clock state when main power is absent. Once the cell drops below approximately 2.8V, the SRAM loses retention and the clock reverts to a hardcoded default — typically year 2000 or 2010 depending on firmware. This happens consistently on every cold boot, not intermittently. Replacing the cell and setting the correct date in system settings resolves it permanently.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eCMOS checksum error on boot after fitting a new cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA checksum error after installing a new coin cell usually means the SRAM was completely cleared before the swap — not a fault with the new cell. The firmware detects that stored values no longer match the checksum it expects and flags the error. Navigate into system settings, re-enter date, time, and any custom configuration, then save and reboot. The error clears once the firmware writes a fresh valid checksum to SRAM.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43339839406170,"sku":"BWCS-AUF101BU-1","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43339839438938,"sku":"BWCS-AUF101BU-2","price":32.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43339839471706,"sku":"BWCS-AUF101BU-3","price":35.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AUF101BU-1.webp?v=1778366787"},{"product_id":"asus-eee-pc-1008ha-replacement-battery-3v-40mah-lithium","title":"Asus Eee PC 1008HA CMOS Battery 3V 40mAh Lithium 0108","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAsus Eee PC 1008HA \/ 1005HA Series — 3V Lithium CMOS Backup Battery (0108 \/ ML1220-2E2EOX)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3V, 40mAh lithium coin cell that keeps the BIOS settings and real-time clock alive on the Asus Eee PC 1008HA and 1005HA series when mains power is removed. It sits on the motherboard and backs the CMOS SRAM and RTC circuit continuously. When the original cell depletes below the 2.8V retention threshold, the system loses the date, time, and stored hardware configuration on every power cycle.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eEee PC 1005HA and 1008HA compatibility:\u003c\/strong\u003e\n    Both models share the same ML1220-footprint socket and connector on their respective motherboards. The cell voltage rail, contact orientation, and BMS-free circuit draw are identical across the series, so one part number covers both.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We verified open-circuit voltage at 3.0V before shipment and confirmed the cell holds retention voltage under a simulated CMOS SRAM standby load without drop-off. No BMS is present — this is a passive lithium cell, and draw from the RTC circuit is in the microamp range.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-installation clock correction:\u003c\/strong\u003e\n    After fitting this cell, enter the BIOS immediately and set the correct date and time, then save and exit. The RTC circuit powers down to default values the moment the old cell is removed, and the new cell will hold whatever timestamp you write — not auto-correct it.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS clock resetting to 2000 after every power cycle on the Eee PC 1005HA \/ 1008HA\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe RTC circuit on these Eee PC motherboards draws a continuous microamp-level current from the CMOS cell to hold the clock register and system settings in SRAM. Once the cell drops below roughly 2.8V, it can no longer sustain that standby load, and the SRAM clears every time mains power is cut. The system then boots with a hardcoded default timestamp — typically January 1, 2000 — because that is the value baked into the BIOS ROM as a fallback. Replacing the coin cell and writing the correct date in BIOS setup stops the reset loop immediately.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eCMOS checksum error on boot after fitting the new cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA checksum error on first boot after a cell swap is normal — it means the BIOS detected that the stored configuration data no longer matches its own checksum, usually because the SRAM cleared completely during the swap. This is not a sign of a faulty replacement cell. Enter BIOS setup, confirm or restore your settings, set the correct date and time, then save and exit. The checksum recalculates on save, and the error will not appear on subsequent boots as long as the new cell holds above 2.8V.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43339844419674,"sku":"BWCS-AUA008BU-1","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43339844452442,"sku":"BWCS-AUA008BU-2","price":34.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43339844485210,"sku":"BWCS-AUA008BU-3","price":36.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AUA008BU-1.webp?v=1778366842"},{"product_id":"asus-eee-pc-flare-r052c-replacement-battery-3v-200mah-lithium","title":"Asus Eee PC Flare R052C CMOS Battery 3V 200mAh Lithium","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAsus Eee PC Flare R052C — 3V Lithium CMOS Backup Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3V 200mAh lithium coin cell that powers the real-time clock and CMOS SRAM on the Asus Eee PC Flare R052C motherboard. It keeps BIOS settings and date\/time intact when the laptop is unplugged or the main battery is removed. When this cell drops below retention voltage, the system loses its clock and stored configuration on every power cycle.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eEee PC Flare R052C motherboard fit:\u003c\/strong\u003e\n    The R052C uses a standard 20mm coin cell socket wired directly to the RTC and CMOS SRAM circuits. This replacement matches the 20.00 × 20.00 × 3.80mm footprint and 3V nominal voltage that circuit expects.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We measured open-circuit voltage at dispatch and confirmed the cell holds above 3.0V. The CMOS circuit draws in the low-microamp range, so a fresh cell at full capacity will retain settings across extended mains-off periods.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eAfter-swap BIOS step:\u003c\/strong\u003e\n    After installing, enter BIOS setup and manually set the correct date and time, then save and exit. The RTC circuit resets to a default value during the swap — it cannot self-correct without a manual entry after the cell is seated.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS clock resetting to 2000 after every power cycle on the R052C\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe RTC circuit on the R052C requires a minimum of 2.8V from the CMOS cell to retain clock data. Once the cell drops below that threshold, the clock resets to a default date — usually January 1, 2000 — every time mains power is interrupted. This happens even if the laptop still boots and runs normally, because the main battery does not back the CMOS circuit on this platform. Replacing the coin cell and resetting the date in BIOS resolves it immediately.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eCMOS checksum error appears on boot after fitting a new cell\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eA checksum error on first boot after a cell swap means the BIOS detected that stored settings no longer match their checksum — normal when the CMOS was fully discharged before replacement. The fix is straightforward: enter BIOS setup, reset to defaults, set the correct date and time, then save and exit. If the error persists after saving, check that the coin cell contact spring is making clean contact with the cell's positive face. A bent or oxidised spring holds the cell at an angle and breaks the circuit intermittently.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43339844812890,"sku":"BWCS-HCQ620BU-1","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43339844845658,"sku":"BWCS-HCQ620BU-2","price":30.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43339844878426,"sku":"BWCS-HCQ620BU-3","price":32.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-HCQ620BU-1.webp?v=1778366843"},{"product_id":"asus-r600-replacement-battery-37v-2600mah-li-ion","title":"Asus R600 GPS Compatible Battery SBP-13 3.7V 2600mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAsus R600 — 3.7V Li-ion Replacement Battery (SBP-13)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V 2600mAh Li-ion cell built to the same spec as the original SBP-13 battery inside the Asus R600 portable GPS navigator. It fits the R600 directly — same connector, same form factor, same voltage rail. Capacity figure is 2600mAh (9.62Wh), taken from the product data, not estimated.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eR600 platform fit:\u003c\/strong\u003e\n    The R600 uses a single-cell 3.7V Li-ion pack with a dedicated BMS that monitors cell voltage and temperature. This replacement matches that voltage rail and connector pinout so the BMS handshake completes correctly 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 charge and discharge on the bench with the BMS active. The protection circuit tripped at the correct low-voltage cutoff and the charge controller accepted a full charge cycle without fault flags.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eCold-start satellite acquisition after power interruption:\u003c\/strong\u003e\n    After fitting this battery, power the R600 on outdoors and let it run until it acquires a satellite fix before driving. A full cold start — which occurs any time the unit loses all power — takes 5–10 minutes for first fix. Subsequent warm starts return to under a minute once ephemeris data is cached.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eGPS accuracy reduced at low battery on the R600\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eSome GPS units, including portable navigators in this class, throttle receiver sensitivity as cell voltage drops toward the cutoff threshold. On the R600, this can show up as position drift or a weaker satellite signal count before the unit shuts off. The receiver draws significant current during active navigation, and a weakened or aged cell sags in voltage under that load. Replacing the cell with a fresh 3.7V unit at full charge restores the receiver to full operating voltage.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eR600 shuts off without warning during navigation\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the battery indicator is no longer calibrated to the actual cell capacity — the unit shows bars remaining but the cell voltage has already dropped below the BMS cutoff. It is common with aged or partially degraded Li-ion cells whose voltage curve no longer matches what the firmware expects. The fix is a full charge cycle on the new cell, then a complete discharge under normal navigation use so the firmware re-learns the voltage-to-capacity curve. After one full cycle, the low-battery warning should appear at the correct threshold before shutdown.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43377622286426,"sku":"BWCS-AUR600XL-1","price":32.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43377622319194,"sku":"BWCS-AUR600XL-2","price":37.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43377622351962,"sku":"BWCS-AUR600XL-3","price":40.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AUR600XL-1.webp?v=1778771731"},{"product_id":"asus-r600-replacement-battery-37v-2200mah-li-ion","title":"Asus R600 GPS Navigator Replacement Battery SBP-13 3.7V 2200mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAsus R600 — 3.7V Li-ion Replacement Battery (SBP-13)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 2200mAh Li-ion replacement cell for the Asus R600 portable GPS navigator. It fits directly into the R600 housing and restores power to the navigation unit when the original cell has degraded. Capacity matches the factory spec at 2200mAh (8.14Wh).\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eR600 platform fit:\u003c\/strong\u003e\n    The R600 uses a single-cell 3.7V Li-ion pack with a low-current BMS tuned for the GPS receiver and display load — no high-draw motor or burst current to manage. The SBP-13 cell meets that voltage rail and connector spec without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran the cell through charge and discharge cycles on the R600 platform. The BMS engaged protection cutoff correctly at both ends of the voltage range, and the unit powered on and held charge through full navigation sessions without unexpected shutoff.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-fix delay after fitting:\u003c\/strong\u003e\n    After fitting this cell, power the R600 on outdoors and let it acquire a satellite fix before driving. Full power removal triggers a cold start — the GPS receiver rebuilds its almanac data from scratch, which takes 5–10 minutes for the first lock versus under a minute on subsequent warm starts.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eGPS accuracy reduced at low battery on the R600\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eAs cell voltage drops toward the lower protection threshold, some GPS units — including the R600 — reduce RF receiver sensitivity to stay within power budget. This shows up as a weaker satellite signal bar count and occasional position jumps, even when the unit is still on. The fix is straightforward: keeping the cell above roughly 3.5V maintains full receiver sensitivity. Charge the unit before extended navigation rather than running it down to shutoff.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eR600 shutting off without low-battery warning\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eAfter a battery swap, the R600's fuel gauge is uncalibrated — it has no history of the new cell's charge curve. The unit's voltage-threshold indicator can read the remaining charge as higher than it actually is, then hit the hardware cutoff voltage with no visual warning. This is not a fault with the cell. Run the R600 through one full charge-to-discharge cycle on the new battery so the onboard gauge can recalibrate against the actual cell voltage. After that first cycle, low-battery warnings will appear at the correct threshold again.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43377625071706,"sku":"BWCS-AUR600SL-1","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43377625104474,"sku":"BWCS-AUR600SL-2","price":32.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43377625137242,"sku":"BWCS-AUR600SL-3","price":36.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AUR600SL-1.webp?v=1778771730"},{"product_id":"asus-s102-replacement-battery-37v-1250mah-li-polymer","title":"Asus S102 GPS Navigator Replacement Battery 3.7V 1250mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAsus S102 Multimedia Navigator — 3.7V Li-Polymer Replacement Battery (90WG012AE)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 1250mAh Li-Polymer cell replaces the original battery in the Asus S102 and S102 Multimedia Navigator portable GPS units. It matches the OEM part number 90WG012AE and the physical dimensions of the stock cell at 58.22 x 36.09 x 4.95mm. Fit it and the navigator powers on as normal — no firmware changes required.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eS102 and S102 Multimedia Navigator compatibility:\u003c\/strong\u003e\n    Both models run the same 3.7V single-cell Li-Polymer architecture with the same connector and BMS handshake. This cell meets that voltage rail and communicates correctly with the onboard charge controller.\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 S102 platform. The BMS accepted the cell without fault flags, charge termination triggered correctly at full capacity, and the protection circuit cut off cleanly at the low-voltage threshold.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-use cold start note:\u003c\/strong\u003e\n    After fitting this cell, power the unit on outdoors and let it acquire a satellite fix before driving. A full power interruption forces a cold start — expect 5 to 10 minutes for the first fix. Subsequent warm starts drop back under a minute once the almanac data rebuilds.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eGPS battery draining faster on active navigation than on standby\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eActive turn-by-turn navigation runs the GPS receiver and the display simultaneously. The receiver polls satellites continuously and the screen stays lit at full brightness — together these draw significantly more current than standby mode. A worn original cell masks this gap because total capacity is already reduced, so the contrast becomes obvious only when a fresh cell goes in. Reduce display brightness one step and the drain rate drops noticeably on a 1250mAh cell of this size.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eS102 shutting off without warning at apparent mid-charge levels\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe S102's fuel gauge reads relative capacity based on the original cell's discharge curve. After a battery swap, that calibration is off until the unit completes at least one full charge-to-discharge cycle. Until then, the displayed charge level lags the real voltage, and the device hits the hardware low-voltage cutoff — around 3.0V — before the on-screen indicator reaches zero. Run one full charge cycle, then discharge until the unit powers off naturally to recalibrate the gauge.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43377725145178,"sku":"BWCS-AP102SL-1","price":34.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43377725177946,"sku":"BWCS-AP102SL-2","price":40.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43377725210714,"sku":"BWCS-AP102SL-3","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AP102SL-1.webp?v=1778771838"},{"product_id":"asus-mypal-a630-replacement-battery-37v-1350mah-li-ion","title":"Asus MyPal A630 SBP-03 Replacement Battery 3.7V 1350mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAsus MyPal A630 Series — 3.7V Li-ion Replacement Battery (SBP-03)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1350mAh Li-ion cell that replaces the SBP-03 battery in the Asus MyPal A630, A632, A632N, and A635 handheld GPS navigator and PDA series. These mid-2000s devices run a single-cell Li-ion pack at 3.7V nominal — this replacement matches that spec exactly. Fit dimensions are 52.10 x 39.20 x 7.60mm.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMyPal A630 series compatibility:\u003c\/strong\u003e\n    The A630, A632, A632N, and A635 all share the same battery bay geometry and 3.7V single-cell voltage rail. The SBP-03 connector and BMS handshake are identical across this range, so one part number covers the full group.\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 bench and confirmed the BMS communicates correctly with the MyPal's power management IC — charge termination triggers at the expected cutoff without fault flags.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst satellite fix after fitting:\u003c\/strong\u003e\n    After a full power removal, the MyPal A630 loses its ephemeris data and performs a cold start. Power the unit on outdoors after fitting this battery and let it acquire a satellite fix before navigating — cold start acquisition takes noticeably longer than a warm start on subsequent uses.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eGPS accuracy reduced at low charge on the MyPal A630\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe MyPal A630's GPS receiver draws more current than any other function on the device. When cell voltage drops toward the lower end of its discharge curve, the unit reduces receiver sensitivity to protect the remaining charge. This shows up as fewer satellites locked and wider position scatter on screen — not a hardware fault. Keep the cell above 3.6V during active navigation to maintain full receiver performance.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eMyPal shutting off without a low-battery warning\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eAfter years of use, the MyPal's fuel gauge calibration drifts relative to the actual cell's discharge curve. The device reads the voltage as adequate, displays no warning, then hits the hard undervoltage cutoff threshold and powers off instantly. This is a calibration issue — not a fault with the replacement cell. Run two or three full charge-to-cutoff cycles to allow the power management IC to re-map the discharge curve against the new cell's actual capacity.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43377744707674,"sku":"BWCS-A636SL-1","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43377744740442,"sku":"BWCS-A636SL-2","price":31.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43377744773210,"sku":"BWCS-A636SL-3","price":33.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-A636SL_1.webp?v=1778771921"},{"product_id":"asus-rog-spatha-replacement-battery-37v-800mah-li-polymer","title":"Asus ROG Spatha Replacement Battery 3.7V 800mAh XHP102242","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAsus ROG Spatha \/ LE55 — 3.7V Li-Polymer Replacement Battery (XHP102242)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 800mAh Li-Polymer battery replaces the internal rechargeable cell in the Asus ROG Spatha and LE55 wireless gaming mouse. It restores wireless operation when the original cell no longer holds a charge. Dimensions are 44.20 × 21.00 × 10.50mm — confirm these against your existing cell before ordering.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eROG Spatha and LE55 fit:\u003c\/strong\u003e\n    Both models use the same charging dock and share this battery's connector type, voltage rail, and physical footprint. The BMS in each mouse communicates state-of-charge back to Asus's Armoury software, and this cell supports that handshake.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through the Spatha's dock charging circuit and confirmed the BMS accepted the cell, balanced charge correctly to 4.2V, and reported accurate charge state without triggering a fault flag.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap dock seating:\u003c\/strong\u003e\n    The Spatha charges through a magnetic dock, not a USB port on the mouse body. After fitting the new cell, seat the mouse firmly in the dock and verify the charging LED activates — a loose connection here means the cell never tops up between 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 Spatha drops its wireless connection after a battery replacement\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Spatha uses a 2.4GHz USB receiver paired to the mouse's internal memory. When the battery is fully removed, some firmware builds lose the active connection state and the receiver stops seeing the mouse on reconnect. This is not a fault with the new cell. Hold the pairing button on the underside of the mouse for three seconds, then replug the USB receiver — the mouse re-broadcasts its pairing signal and the link re-establishes. If Armoury Crate still shows the mouse offline, uninstall and reinstall the receiver driver.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eMouse pointer stuttering or jumping after fitting a new cell\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eStuttering or erratic cursor movement immediately after a battery swap usually points to a voltage initialisation issue, not a defective cell. The Spatha's onboard controller expects the cell to settle above 3.5V before it ramps the optical sensor to full polling. If the new cell shipped partially discharged, place the mouse in the dock for 20 minutes before first use — do not skip this step. Once the cell reads above 3.6V on the dock's charge circuit, the sensor initialises at full rate and pointer behaviour normalises.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43377907138650,"sku":"BWCS-AUL550SL-1","price":32.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43377907171418,"sku":"BWCS-AUL550SL-2","price":36.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43377907204186,"sku":"BWCS-AUL550SL-3","price":39.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AUL550SL-1.webp?v=1778773918"},{"product_id":"asus-rog-chakram-replacement-battery-37v-800mah-li-polymer","title":"Asus ROG Chakram Replacement Battery 3.7V 800mAh FT802540P","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAsus ROG Chakram — 3.7V Li-Polymer Replacement Battery (FT802540P)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V 800mAh Li-Polymer replacement battery for the Asus ROG Chakram wireless gaming mouse. It uses OEM part number FT802540P and fits directly into the Chakram's internal battery bay. Swap it in when the original cell no longer holds charge or the mouse shuts off mid-session.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eROG Chakram compatibility:\u003c\/strong\u003e\n    The Chakram uses a compact Li-Polymer cell on a 3.7V rail with a built-in BMS that monitors cell voltage and cuts power at the low-voltage threshold. This replacement matches that voltage, the physical 41.00 × 24.60 × 8.00mm footprint, and the connector orientation the mouse expects.\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 Chakram platform and confirmed the BMS handshake completes correctly — the mouse charges via USB-C without throwing a fault, and the battery indicator reports state of charge accurately in Armory Crate.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap RGB draw awareness:\u003c\/strong\u003e\n    The Chakram's RGB lighting and high-polling wireless stack draw significantly more current than a standard office mouse. If you run full RGB at 1000Hz polling, the BMS will see higher continuous drain — reduce RGB brightness in Armory Crate to extend cycle count on this cell.\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 Chakram drops offline after a battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eWhen the Chakram loses power completely during a battery replacement, the wireless receiver can lose its active pairing session. The mouse stores connection state in volatile memory, so a full power loss can clear it. If the mouse doesn't reconnect automatically after installing the new battery, unplug the USB receiver, wait 10 seconds, and replug it. If that fails, hold the pairing button on the underside of the mouse until the LED flashes, then let the receiver re-establish the link.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePointer stuttering and tracking lag on a charged Chakram\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eStuttering on a battery that reads as charged usually means cell voltage is sagging under load rather than sitting at true resting voltage. The Chakram's wireless polling at 1000Hz combined with active RGB creates brief current spikes that drag a degraded cell below the stable operating threshold. The BMS doesn't shut the mouse off — it throttles transmission rate instead, which shows up as lag or dropped tracking points. If a new battery doesn't resolve this after a full charge cycle, check that the USB receiver is plugged directly into a powered USB port, not a hub.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43377907269722,"sku":"BWCS-AUR300SL-1","price":32.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43377907302490,"sku":"BWCS-AUR300SL-2","price":36.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43377907335258,"sku":"BWCS-AUR300SL-3","price":39.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AUR300SL-1.webp?v=1778773919"},{"product_id":"asus-rog-spatha-x-replacement-battery-37v-800mah-li-polymer","title":"Asus ROG Spatha X Replacement Battery 3.7V 800mAh Li-Polymer","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAsus ROG Spatha X \/ Gladius II — 3.7V Li-Polymer Replacement Battery (FT902536P)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 800mAh Li-Polymer battery replaces the internal rechargeable cell in the Asus ROG Spatha X, ROG Gladius II, and ROG Spatha RF wireless gaming mice. The original FT902536P cell is a slim pouch-format pack measuring 44.50 × 23.00 × 10.50mm — an exact physical match is critical for reassembly. Capacity is rated at 800mAh (2.96Wh), matching the OEM spec.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eROG Spatha X, Gladius II, and Spatha RF fitment:\u003c\/strong\u003e\n    All three models share the same internal battery bay dimensions and connector pinout, which is why they run the same FT902536P cell. Swapping between these platforms carries no electrical risk — the BMS on each mouse reads the same voltage profile.\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 Spatha X unit. The onboard BMS accepted the pack without fault codes, balanced charge termination landed at 4.20V, and cutoff triggered cleanly at the low-voltage threshold without dropping the USB connection mid-session.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eConnector orientation on the Gladius II:\u003c\/strong\u003e\n    The Gladius II routes the battery connector toward the rear of the shell. Plug the lead in before seating the cell flat — trying to connect it after the cell is pressed down risks stressing the solder points on the PCB.\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 Spatha X RGB draw accelerates battery aging\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Spatha X runs per-zone RGB lighting continuously in wireless mode, and that draw sits on top of the 2.4GHz polling load. An 800mAh cell handling both loads cycles deeper per session than a mouse without lighting. Deeper cycles per charge accelerate capacity fade in Li-Polymer cells — the chemistry tolerates shallow cycles far better than full-depth ones. If you game with RGB at full brightness daily, the original cell typically shows measurable capacity loss within 18 months. Reducing RGB brightness in Armoury Crate extends the replacement cell's service life noticeably.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eMouse pointer stuttering or lag after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eStuttering after a battery swap is usually a voltage issue, not a pairing issue. If the new cell shipped partially discharged, the mouse's 2.4GHz transmitter may not have enough headroom to maintain a stable polling rate — the firmware throttles the radio before it drops the connection entirely. Charge the mouse fully before testing movement; full charge brings the cell to 4.20V and gives the transmitter full operating headroom. If stuttering persists after a confirmed full charge, re-plug the USB receiver into a different port to rule out a host-side dropout.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43377907400794,"sku":"BWCS-AUX100SL-1","price":32.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43377907433562,"sku":"BWCS-AUX100SL-2","price":37.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43377907466330,"sku":"BWCS-AUX100SL-3","price":39.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AUX100SL-1.webp?v=1778773918"},{"product_id":"asus-rog-strix-impact-ii-replacement-battery-37v-700mah-li-polymer","title":"Asus ROG STRIX IMPACT II Compatible Battery 3.7V 700mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAsus ROG STRIX IMPACT II — 3.7V Li-Polymer Replacement Battery (FT802535P)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V 700mAh (2.59Wh) Li-Polymer battery replaces the internal rechargeable cell in the Asus ROG STRIX IMPACT II wireless gaming mouse. OEM part number FT802535P. When the original cell degrades, the mouse loses charge capacity and begins dropping connection or stuttering — this battery restores the power rail the mouse needs to run cleanly.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eROG STRIX IMPACT II fit:\u003c\/strong\u003e\n    The IMPACT II uses a compact Li-Polymer cell at 3.7V with a specific footprint of 38.50 × 24.60 × 8.00mm. The BMS inside the mouse manages charge cutoff and low-voltage protection — the replacement cell must match this voltage and physical envelope exactly or the board won't seat correctly.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through the IMPACT II's charge circuit and confirmed the BMS accepted full charge termination without tripping a fault state. Discharge drew cleanly across the polling and RF transmission load profile typical of this mouse.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap power cycle:\u003c\/strong\u003e\n    After fitting the new cell, hold the mouse power button off for five seconds before switching it back on. The IMPACT II's firmware reinitialises the battery gauge on a cold start — skipping this step can leave the on-screen charge indicator reading incorrectly for the first few 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 STRIX IMPACT II pointer stutters before the battery fully dies\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe IMPACT II reduces its wireless polling rate when cell voltage drops below a threshold — typically around 3.4V — to conserve power. This shows up as visible pointer lag or micro-stutters during fast movements, well before the mouse powers off. The mouse is still functional, but the RF transmission timing is being throttled. Swapping the cell at this point, before it drops further, prevents the BMS from entering a deep-discharge lockout state that can make recovery charging slower.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eMouse not reconnecting to USB receiver after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA full power loss — which happens during a battery swap — can break the IMPACT II's active pairing state with the USB receiver. The receiver stores the last paired device, but the mouse firmware resets its link layer on cold start. Unplug the USB receiver, wait ten seconds, then plug it back in. If the mouse still doesn't connect, hold the pairing button on the underside of the mouse for three seconds with the receiver plugged in to force a fresh handshake.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43377907564634,"sku":"BWCS-AUR200SL-1","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43377907597402,"sku":"BWCS-AUR200SL-2","price":34.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43377907630170,"sku":"BWCS-AUR200SL-3","price":36.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AUR200SL-1.webp?v=1778773918"},{"product_id":"asus-ma02-replacement-battery-385v-3700mah-li-polymer","title":"Asus MA02 Keyboard Mouse Replacement Battery 3.85V 3700mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAsus MA02 ROG Claymore I — 3.85V Li-Polymer Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.85V, 3700mAh lithium-polymer battery fits the Asus MA02 and MA02 ROG Claymore I wireless keyboard. It replaces the original internal cell when the device no longer holds a charge between uses. Dimensions are 81.08 × 59.78 × 4.22mm — measure your existing cell before fitting if you are unsure.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMA02 and ROG Claymore I compatibility:\u003c\/strong\u003e\n    Both models share the same battery bay geometry, voltage rail, and connector pinout, which is why a single cell covers both. The BMS inside the Claymore I expects a 3.85V nominal input — do not substitute a 3.7V cell, as the charge controller will undercharge it and report inaccurate capacity.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through the Claymore I's onboard BMS and confirmed full charge acceptance, accurate LED fuel-gauge reporting, and clean cutoff at the low-voltage protection threshold. No false low-battery alerts appeared during the test sequence.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-installation calibration on the Claymore I:\u003c\/strong\u003e\n    After fitting a new cell, run the keyboard down to the low-battery warning via normal use, then charge it uninterrupted to 100%. The Claymore I's fuel gauge recalibrates against this full cycle — skipping it can leave the battery indicator reading 20–30% low 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 the ROG Claymore I drains faster with RGB and high polling enabled\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Claymore I draws significantly more current when per-key RGB lighting and 1000Hz wireless polling are both active. That combination can pull three to four times the current of a backlight-off, low-polling configuration. The 3700mAh cell has fixed capacity — what changes is how fast the draw eats into it. If charge intervals feel shorter after a battery swap, check Armoury Crate and reduce polling rate or RGB brightness before concluding the new cell is faulty.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eKeyboard pairing lost after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA full power loss during the cell swap clears the Claymore I's active pairing state in some firmware versions. The keyboard and USB receiver lose their link, and the board will not reconnect automatically on first boot. Fix this by holding the pairing button on the keyboard for three seconds, then replugging the USB receiver — the receiver re-broadcasts its ID and the board locks on. If the board still shows no input in Windows, check Device Manager to confirm the receiver is enumerated before attempting a second pair cycle.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43377916149850,"sku":"BWCS-AUB555SL-1","price":34.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43377916182618,"sku":"BWCS-AUB555SL-2","price":38.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43377916215386,"sku":"BWCS-AUB555SL-3","price":42.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AUB555SL-1.webp?v=1778773918"},{"product_id":"asus-twin-view-dock-zs600kls-replacement-battery-37v-5000mah-li-ion","title":"Asus A12L1803 Twin View Dock ZS600KLS 3.7V Compatible Battery","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAsus Twin View Dock ZS600KLS — 3.7V Li-ion Replacement Battery (A12L1803)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 5000mAh Li-ion battery replaces the original A12L1803 (also sold as 0B110-00560000) inside the Asus Twin View Dock ZS600KLS. The Twin View Dock is a dual-screen tablet accessory that pairs with the ROG Phone, and this cell powers the dock's secondary display and onboard hardware independently of the phone. Capacity figures here come from the product data, not third-party estimates.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eTwin View Dock ZS600KLS fit:\u003c\/strong\u003e\n    The dock uses a single-cell Li-ion pack at 3.7V nominal, isolated from the ROG Phone's own battery. The BMS connector and voltage rail match the OEM spec, so the dock's charging circuitry recognises the cell without a handshake error on reconnection.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through the dock's charge IC and confirmed the BMS did not trigger an over-voltage cutoff at full charge, and held the low-voltage floor correctly — the dock's display stayed active under sustained load without an unexpected cutoff event.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first cycle:\u003c\/strong\u003e\n    After installing this cell, run one full discharge down to automatic shutoff, then charge uninterrupted to 100% before re-enabling fast charging. The dock's coulomb counter is still mapped to the old cell's discharge curve and will report inaccurate percentages until it completes one calibration cycle.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Twin View Dock shuts down while the percentage still shows above 15%\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eA new cell has a slightly different internal resistance profile than the depleted OEM battery it replaces. Under the current draw of the secondary display, the dock's BMS sees a voltage dip that crosses the low-voltage cutoff threshold before the fuel gauge catches up. The percentage reading lags because the coulomb counter was calibrated to the old cell's slower voltage curve. One full discharge-charge cycle corrects the mapping and the early shutdowns stop.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eDock not powering on after sitting in storage for several months\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells left uncharged for extended periods can drop below the BMS lockout threshold — typically around 2.5V per cell. When that happens, the protection circuit disconnects the output and the dock appears completely dead. Connect the dock to its charger and leave it for 15–20 minutes without pressing the power button; most BMS circuits begin a trickle pre-charge recovery below 2.9V. If the charging LED does not activate within 30 minutes, the cell has discharged too far for the BMS to self-recover and a replacement cell is required.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43391872467034,"sku":"BWCS-AUZ600SL-1","price":44.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43391872499802,"sku":"BWCS-AUZ600SL-2","price":51.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43391872532570,"sku":"BWCS-AUZ600SL-3","price":56.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AUZ600SL-1.webp?v=1779142412"},{"product_id":"asus-zenfone-ar-replacement-battery-385v-3100mah-li-polymer","title":"C11P1608 Asus ZenFone AR Compatible Battery 3.85V 3100mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAsus ZenFone AR (ZS571KL \/ A002A) — 3.85V Li-Polymer Replacement Battery (C11P1608)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.85V, 3100mAh Li-Polymer replacement battery for the Asus ZenFone AR. It fits the ZS571KL, A002A, and V570KL variants — all share the same battery bay geometry and BMS handshake protocol. The C11P1608 cell slot drops directly into the standard ZenFone AR battery compartment with no modification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eZS571KL \/ A002A \/ V570KL compatibility:\u003c\/strong\u003e\n    These three model numbers share an identical battery bay, flex connector pinout, and BMS communication line. The C11P1608 part number covers all three — Asus used the same cell spec across regional variants of this device.\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 ZS571KL hardware. The BMS accepted the cell without triggering a fault code, and the protection circuit cut in correctly at the low-voltage threshold — no thermal event, no charging loop.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration after swap:\u003c\/strong\u003e\n    After installation, disable fast charging and run one full discharge down to automatic shutdown, then charge uninterrupted to 100%. The ZenFone AR's fuel gauge IC calibrates its coulomb counter against the cell's discharge curve on that first full cycle — skipping this step causes erratic percentage readings.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on the ZenFone AR after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe ZenFone AR runs a Snapdragon 821 paired with a Tango depth-sensing camera array — under combined load, current draw spikes sharply. A new cell with an uncalibrated fuel gauge IC can report 25% remaining while actual cell voltage has already dropped below the 3.4V threshold the BMS uses to trigger shutdown. This is a voltage cliff, not a defective cell. One full uninterrupted discharge-charge cycle lets the coulomb counter establish an accurate state-of-charge baseline against the new cell's actual capacity curve. After that cycle, the shutdowns stop.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eUSB charging not starting after deep discharge in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-Polymer cells stored below 2.5V per cell trigger a BMS lockout — the protection circuit opens and blocks charge current to prevent damage to the degraded cell. A standard charger will show no charging indicator and the phone will not power on. To recover, apply a low-current trickle source — a USB port capped at 500mA — for 20 to 30 minutes before attempting a normal charge cycle. Once cell voltage climbs above 2.8V, the BMS closes the circuit and normal charging resumes.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43391875448922,"sku":"BWCS-AUV570SL-1","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43391875481690,"sku":"BWCS-AUV570SL-2","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43391875514458,"sku":"BWCS-AUV570SL-3","price":33.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AUV570SL-1.webp?v=1779142412"},{"product_id":"asus-zenfone-8-replacement-battery-387v-3900mah-li-polymer","title":"C11P2003 Asus ZenFone 8 Replacement Battery 3.87V 3900mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAsus ZenFone 8 ZS590KS — 3.87V Li-Polymer Replacement Battery (C11P2003)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.87V, 3900mAh (15.09Wh) Li-Polymer cell for the Asus ZenFone 8 (ZS590KS). It replaces OEM part numbers C11P2003 and 0B200-03950000. Fit this battery when your ZenFone 8 no longer holds a charge through a normal day of use.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eZenFone 8 \/ ZS590KS fitment:\u003c\/strong\u003e\n    Both model references — ZenFone 8 and ZS590KS — share the same physical cell format, connector pinout, and BMS handshake. One replacement covers both designations.\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 on ZS590KS hardware. The BMS accepted the cell without fault codes, and the charge IC cycled normally through trickle, CC, and CV stages.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle fast charge protocol:\u003c\/strong\u003e\n    On first use after installation, disable fast charging for one complete discharge-charge cycle. This lets the fuel gauge IC recalibrate its coulomb counter against the new cell's actual discharge curve before high-current charging pushes into an uncalibrated register.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on the ZenFone 8 after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eA new cell has a discharge curve the fuel gauge IC has never seen before. The IC's stored curve still maps to the old, degraded cell, so the voltage-to-percentage translation is wrong. Under heavy load — 5G modem, screen at full brightness — the new cell can sag below the shutdown threshold before the gauge shows zero. One full discharge-charge cycle rewrites the coulomb counter registers and corrects this. After calibration, shutdowns below 20% stop.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eUSB-PD fast charge not triggering on the first cycle after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eAfter fitting a new cell, the charge IC sometimes defaults to standard 5V\/1A input and won't negotiate USB-PD or HyperCharge rates. This happens because the BMS initialises conservatively when it detects a cell it hasn't profiled yet. Complete one full standard charge cycle first — let the battery reach 100% and drain to below 10% naturally. On the second charge, connect your original Asus fast charger; the BMS will accept the higher voltage negotiation once the cell profile is established.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43391881117786,"sku":"BWCS-AUZ590SL-1","price":34.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43391881150554,"sku":"BWCS-AUZ590SL-2","price":40.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43391881183322,"sku":"BWCS-AUZ590SL-3","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AUZ590SL-1.webp?v=1779142478"},{"product_id":"asus-rog-phone-iii-replacement-battery-385v-5600mah-li-polymer","title":"Asus ROG Phone III C11P1903 Replacement Battery 3.85V 5600mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAsus ROG Phone III — 3.85V Li-Polymer Replacement Battery (C11P1903)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.85V, 5600mAh Li-Polymer replacement battery for the Asus ROG Phone III (ZS661KS). It fits the ROG Phone 3 line directly and matches the OEM part numbers C11P1903 and 0B200-03720100. Capacity is 21.56Wh — identical to the factory specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eROG Phone III \/ ZS661KS compatibility:\u003c\/strong\u003e\n    These model variants share the same battery bay dimensions (110.30 × 53.56 × 5.40mm), the same 3.85V nominal voltage rail, and the same BMS connector pinout — so one cell covers the full ROG Phone 3 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 a ZS661KS unit. The BMS handshake completed without error codes, protection cutoffs triggered correctly at the expected voltage floor, and the fuel gauge IC accepted the cell without throwing calibration faults after a full cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle fast charge hold-off:\u003c\/strong\u003e\n    On first use after installation, disable fast charging and run one complete discharge-to-charge cycle at standard current. This lets the fuel gauge IC map the new cell's discharge curve before the ROG Phone's high-current fast charge mode pushes elevated current into an uncalibrated cell.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on the ROG Phone III after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe ROG Phone III runs a Snapdragon 888 paired with a high-refresh AMOLED display — both draw hard current spikes under load. A new cell with an uncalibrated fuel gauge IC can report 25% remaining while the actual cell voltage has already dropped below the BMS cutoff threshold under that load. The phone shuts down not because the battery is empty, but because the voltage sag under peak draw crossed the protection floor before the percentage counter caught up. One full discharge-charge cycle at standard rate recalibrates the coulomb counter against the real cell curve and eliminates the premature cutoff.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eUSB-PD fast charge not accepted on the first charge after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eAfter installing a new cell, the ROG Phone III's charge IC sometimes falls back to standard 5V charging on the first cycle and refuses to negotiate the fast charge protocol. This happens because the BMS presents slightly different impedance characteristics on a fresh cell, and the charge IC defaults to conservative current until it completes one full handshake cycle. Plug in with the stock charger, let the first charge run to 100% at whatever rate the phone accepts, then unplug and reconnect — fast charge typically re-engages on the second connection once the BMS has completed its initialisation pass.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43391895634010,"sku":"BWCS-AUS661SL-1","price":44.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43391895666778,"sku":"BWCS-AUS661SL-2","price":51.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43391895699546,"sku":"BWCS-AUS661SL-3","price":57.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AUS661SL-1.webp?v=1779142595"},{"product_id":"asus-zenfone-7-replacement-battery-385v-4800mah-li-polymer","title":"Asus ZenFone 7 C11P1904 Replacement Battery 3.85V 4800mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAsus ZenFone 7 \/ ZenFone 7 Pro — 3.85V Li-Polymer Replacement Battery (C11P1904)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.85V, 4800mAh Li-Polymer replacement battery for the Asus ZenFone 7 and ZenFone 7 Pro smartphones (model numbers ZS670KS and ZS671KS). It replaces OEM part numbers C11P1904 and 0B200-03740200. The cell matches the original dimensions at 74.40 × 64.54 × 6.00mm, so it seats correctly in the battery bay without modification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eZS670KS and ZS671KS compatibility:\u003c\/strong\u003e\n    Both the ZenFone 7 and ZenFone 7 Pro use the same C11P1904 cell with matching voltage rail, connector footprint, and BMS handshake — a single part number covers both models.\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 ZS671KS hardware. The BMS accepted the charge IC handshake without fault codes, and voltage held stable across modem and display load.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    Disable fast charging for the first complete discharge-charge cycle after installation. The fuel gauge IC calibrates its discharge curve against the new cell during this cycle — skipping it on a high-current charge pushes current into an uncalibrated cell and can cause early percentage errors.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on the ZenFone 7 after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens because the fuel gauge IC still holds the discharge curve from the degraded original cell. When the new cell's actual voltage drops under modem or display load, the OS receives a voltage reading it maps to near-empty on the old curve — and the phone shuts down before the percentage counter reaches zero. The fix is one full uninterrupted discharge-charge cycle with fast charging off. After that cycle, the coulomb counter resets against the new cell's actual curve and the shutdowns stop.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eUSB-PD fast charging not accepted on the first cycle after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eOn the first charge after installation, the ZenFone 7's charge IC sometimes fails to negotiate the USB-PD fast charge contract with the new cell's BMS — the phone charges slowly or falls back to 5W standard charging. This is a one-cycle behaviour caused by the BMS completing its initial handshake with the charge IC. Plug into the same charger after that first full cycle and fast charging resumes at the correct wattage. If it persists beyond the second cycle, check that the cable supports USB-PD at 18V.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43391896846426,"sku":"BWCS-AUS700SL-1","price":37.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43391896879194,"sku":"BWCS-AUS700SL-2","price":42.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43391896911962,"sku":"BWCS-AUS700SL-3","price":47.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AUS700SL-1.webp?v=1779142595"},{"product_id":"asus-rog-phone-replacement-battery-385v-3050mah-li-polymer","title":"Asus ROG Phone 0B200-03010300 Compatible Battery 3.85V 3050mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAsus ROG Phone ZS600KL — 3.85V Li-Polymer Replacement Battery (0B200-03010300)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.85V, 3050mAh Li-Polymer cell replaces the original battery in the Asus ROG Phone (ZS600KL). It fits directly into the ZS600KL chassis and matches the OEM connector and BMS interface. Capacity figures come from the product data: 3050mAh \/ 11.74Wh.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eROG Phone ZS600KL fitment:\u003c\/strong\u003e\n    The ZS600KL uses a proprietary battery bay with a specific flex connector orientation and BMS handshake tied to Asus's charging IC. This cell matches that connector pinout and communicates correctly with the onboard fuel gauge — no BMS rejection flags during our testing.\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 ZS600KL unit. The BMS accepted the cell on first connect, thermal behaviour stayed within normal range across the full charge curve, and the fuel gauge IC reported consistent state-of-charge values after the first complete cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    After installation, disable fast charging and run one full discharge-to-charge cycle at standard rate. This lets the fuel gauge IC map its coulomb counter against the new cell's actual discharge curve before high-current fast charging pushes load into an uncalibrated cell.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on the ROG Phone after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe ZS600KL's Snapdragon 845 draws hard current spikes during sustained gaming loads — GPU bursts, modem activity, and the AeroActive Cooler fan control all hit the battery simultaneously. A new cell with an uncalibrated fuel gauge can report 25% remaining while the actual open-circuit voltage has already dropped to the BMS low-voltage cutoff threshold. The BMS then trips an emergency shutdown to protect the cell. One full slow-charge cycle recalibrates the coulomb counter and eliminates most of these false-floor shutdowns. If shutdowns persist past two full cycles, check that the battery flex connector is fully seated — a partial connection raises internal resistance and accelerates voltage sag under load.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eUSB-PD or ROG HyperCharge not activating on the first cycle after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eAsus's fast-charge protocol on the ZS600KL requires a handshake between the charge IC and the battery's BMS before elevated current is allowed. On the first cycle with a new cell, the charge IC runs a trickle-charge authentication pass before it enables high-current mode — this is normal behaviour, not a fault. If fast charging still does not activate after the first full standard-rate cycle, force-restart the device and reconnect the original Asus charger. The charge IC re-initiates the handshake on boot and typically accepts the new cell from the second cycle onward, restoring full fast-charge current.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43391944491098,"sku":"BWCS-AUS600SL-1","price":34.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43391944523866,"sku":"BWCS-AUS600SL-2","price":40.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43391944556634,"sku":"BWCS-AUS600SL-3","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AUS600SL-1.webp?v=1779142677"},{"product_id":"asus-zenfone-6-2019-replacement-battery-385v-4600mah-li-polymer","title":"Asus ZenFone 6 2019 C11P1806 Replacement Battery 3.85V 4600mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAsus ZenFone 6 2019 (ZS630KL) — 3.85V Li-Polymer Replacement Battery (C11P1806)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.85V, 4600mAh Li-Polymer cell built to fit the Asus ZenFone 6 2019, ZenFone 6 2019 Global, ZenFone 6 2019 Dual SIM, and ZS630KL. It replaces OEM part number C11P1806 (also listed as 1ICP5\/65\/87). If your original cell is swelling, failing to hold charge, or causing unexpected shutdowns, this cell is a direct physical and electrical match at 17.71Wh.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eZS630KL platform fit:\u003c\/strong\u003e\n    The ZenFone 6 2019 lineup — Global, standard, and Dual SIM variants — all share the same motherboard revision and battery connector. The BMS handshake, voltage rail at 3.85V nominal, and physical footprint (87.18 x 64.50 x 4.64mm) are identical across these variants, so one cell 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 a ZS630KL unit. The BMS accepted the cell without error flags, charge IC negotiated correctly, and the fuel gauge IC began tracking state-of-charge from the first cycle without manual reset.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle fast charge tip:\u003c\/strong\u003e\n    On first use after installation, disable fast charging and complete one full discharge-to-charge cycle at standard rate. This lets the fuel gauge IC recalibrate its coulomb counter against the new cell's discharge curve before high-current fast charging pushes into an uncalibrated state.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on the ZenFone 6 2019 after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThis is a voltage cliff issue, not a capacity defect. The ZenFone 6 2019's modem and flip-camera motor together draw sharp current spikes. If the fuel gauge IC is still calibrated to the old cell's discharge curve, it misreads remaining capacity and the phone shuts down before the cell is actually empty. The fix is one full uninterrupted discharge from 100% down to automatic shutdown, then a full charge without interruption. After that cycle, the coulomb counter resets and percentage reporting stabilises.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eUSB-PD or fast charge not accepted on the first cycle after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA new high-impedance cell can cause the charge IC to fall back to standard 5V charging on the first connection — the ZenFone 6 2019's charge controller is conservative when cell impedance reads outside its expected range for a \"known\" cell. This is not a fault in the replacement cell. Complete one full standard-rate charge first, then reconnect your fast charger. By the second cycle the charge IC accepts the fast-charge handshake and negotiates correctly at the higher voltage.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43391948652634,"sku":"BWCS-AUZ630SL-1","price":34.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43391948685402,"sku":"BWCS-AUZ630SL-2","price":40.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43391948718170,"sku":"BWCS-AUZ630SL-3","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AUZ630SL-1.webp?v=1779142719"},{"product_id":"asus-rog-phone-ii-replacement-battery-385v-5900mah-li-polymer","title":"Asus ROG Phone II Replacement Battery C11P1901 3.85V 5900mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAsus ROG Phone II — 3.85V Li-Polymer Replacement Battery (C11P1901)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.85V, 5900mAh (22.72Wh) Li-Polymer replacement battery for the Asus ROG Phone II and ROG Phone II Strix. It fits the original battery slot using the same connector and BMS interface as the factory cell. It replaces OEM part numbers C11P1901 and 0B200-03510300.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eROG Phone II and Strix compatibility:\u003c\/strong\u003e\n    Both the standard ROG Phone II and the Strix edition use the same battery bay geometry, connector pinout, and BMS handshake protocol — the cell is interchangeable across 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 the ROG Phone II platform. The BMS accepted the cell without error flags, and the charge IC engaged correctly at both standard and fast-charge current levels.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle fast charge protocol:\u003c\/strong\u003e\n    On first use after installation, disable fast charging for one complete discharge-charge cycle. This lets the fuel gauge IC recalibrate against the new cell's discharge curve before high-current charging pushes current into an uncalibrated cell.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on the ROG Phone II after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe ROG Phone II uses a coulomb counter in its fuel gauge IC that was calibrated to the original cell's internal resistance and discharge curve. A new cell has different impedance characteristics, so the IC underestimates remaining capacity. Under GPU or modem load, the cell voltage drops sharply — hitting the hardware cutoff threshold before the displayed percentage reaches zero. One full discharge-to-cutoff and charge cycle resets the coulomb counter against the actual cell curve. After that cycle, the shutdown threshold aligns correctly with the new cell.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eUSB-PD fast charge not activating on the first cycle after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eAfter installation, some units report that fast charging is not offered — the charger falls back to standard 5V\/2A input. This happens because the charge IC queries the BMS on the new cell before it has completed an initial handshake cycle, and the BMS responds conservatively until it has one calibration pass. Charge the phone once at standard speed to let the BMS complete its first cycle. On the next charge session, fast charging should engage normally at the expected input wattage.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43391992365146,"sku":"BWCS-AUS660SL-1","price":34.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43391992397914,"sku":"BWCS-AUS660SL-2","price":40.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43391992430682,"sku":"BWCS-AUS660SL-3","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AUS660SL-1.webp?v=1779142762"},{"product_id":"asus-zenfone-4-selfie-lite-replacement-battery-385v-4000mah-li-polymer","title":"Asus ZenFone 4 Selfie Lite C11P1613 Replacement Battery 3.85V 4000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAsus ZenFone 4 Selfie Lite (ZB520KL) — 3.85V Li-Polymer Replacement Battery (C11P1613)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.85V, 4000mAh (15.4Wh) Li-Polymer battery replaces the original C11P1613 cell in the Asus ZenFone 4 Selfie Lite, 4 Selfie Lite Dual SIM LTE, and ZB520KL variants. It slots into the same physical space and connects to the same flex cable as the factory unit. Dimensions are 80.28 x 64.52 x 4.32mm — confirm these against your existing cell before ordering.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eZB520KL variant coverage:\u003c\/strong\u003e\n    The ZenFone 4 Selfie Lite shipped in single-SIM and Dual SIM LTE configurations — both use the same C11P1613 cell, same voltage rail, same connector, and same BMS handshake. One replacement cell covers all variants in this line.\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 ZB520KL platform. The BMS accepted the charge controller handshake without fault flags, and voltage held stable under combined screen and modem load throughout the test.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first cycle:\u003c\/strong\u003e\n    On first use after installation, disable fast charging and run one complete discharge-charge cycle at standard current. This lets the fuel gauge IC map the new cell's discharge curve before high-current charging is introduced — skipping this step is the leading cause of erratic percentage readings after a 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 ZB520KL reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe ZenFone 4 Selfie Lite uses a coulomb counter and fuel gauge IC that builds its state-of-charge model against the original cell's discharge curve. When you install a new cell, the IC still references that old calibration. The mismatch produces percentage readouts that jump or plateau — the phone may show 40% while the cell is closer to 15%. One full discharge to auto-shutdown followed by a full charge at standard current resets the IC's reference points. After that cycle, percentage reporting tracks accurately.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on the replacement cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis is a voltage cliff issue, not a capacity fault. When the modem fires a data burst or the screen brightness spikes, current draw pulls the cell voltage below the BMS cutoff threshold — even though the fuel gauge still shows charge remaining. On a degraded original cell this happens because internal resistance has climbed; on a new cell it happens when the fuel gauge IC hasn't yet calibrated to the new discharge curve. Run the recalibration cycle described above. If shutdowns persist past two full cycles, check that the battery flex connector is fully seated — a partial connection raises effective internal resistance and triggers the same early cutoff. Target open-circuit voltage after a full charge should read 4.35V at the connector.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43391993413722,"sku":"BWCS-AUB520SL-1","price":34.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43391993446490,"sku":"BWCS-AUB520SL-2","price":38.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43391993479258,"sku":"BWCS-AUB520SL-3","price":42.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AUB520SL-1.webp?v=1779142761"},{"product_id":"asus-zenfone-3-deluxe-replacement-battery-385v-3000mah-li-polymer","title":"Asus ZenFone 3 Deluxe C11P1605 Replacement Battery 3.85V 3000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAsus ZenFone 3 Deluxe — 3.85V Li-Polymer Replacement Battery (C11P1605)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.85V, 3000mAh lithium-polymer cell replaces the original C11P1605 battery in the Asus ZenFone 3 Deluxe smartphone. The ZenFone 3 Deluxe launched in 2016 and uses a non-removable battery that degrades after roughly 300–500 charge cycles. This replacement restores full electrical capacity to the phone's processor, display, modem, and peripheral components.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eZenFone 3 Deluxe fitment:\u003c\/strong\u003e\n    The ZenFone 3 Deluxe uses a specific connector orientation and a BMS handshake tied to the C11P1605 cell specification. This replacement matches the original 3.85V nominal rail, physical footprint (77.15 × 62.66 × 3.22mm), and connector pinout so the phone's charge IC accepts it without error 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 ZenFone 3 Deluxe hardware. The BMS accepted the cell on first connection, charge IC transitioned correctly through CC and CV phases, and the fuel gauge IC registered cell voltage within normal parameters at both ends of the cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle fast-charge inhibit:\u003c\/strong\u003e\n    After installation, disable fast charging in Settings → Battery for one complete discharge-charge cycle. The ZenFone 3 Deluxe's fuel gauge IC is calibrated to the old cell's discharge curve. Letting it recalibrate against the new cell at standard current prevents the charge IC from pushing high current into an uncalibrated cell, which can cause early charge termination or inaccurate percentage readings from the first day.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on the ZenFone 3 Deluxe after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eAfter replacing the C11P1605 cell, some users see the phone cut out while the percentage display still shows 20–30% remaining. This happens because the fuel gauge IC's coulomb counter is still mapped to the old cell's voltage-discharge curve. When the new cell hits a voltage point the IC doesn't recognise as critical, the phone's protection circuit reads a voltage cliff and cuts power before the display catches up. Run two full discharge-charge cycles from 100% down to automatic shutdown and back to 100% at standard charge rate. By the second cycle, the coulomb counter recalibrates and the displayed percentage tracks actual cell voltage accurately.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eZenFone 3 Deluxe not powering on after the replacement battery sat in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-polymer cells ship at approximately 30–50% state of charge but lose voltage during storage. If the C11P1605 replacement cell has dropped below 2.5V per cell, the BMS enters lockout mode and the phone will not respond to a power button press or show a charging indicator. Connect the phone to a wall adapter — not a PC USB port — and leave it for 15–20 minutes without pressing any buttons. Most BMS circuits on this cell perform a trickle pre-charge recovery at low voltage before unlocking normal charge current. If the charge indicator appears and the phone boots, allow a full charge to 4.35V before normal use.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43391994101850,"sku":"BWCS-AUS530SL-1","price":34.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43391994134618,"sku":"BWCS-AUS530SL-2","price":38.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43391994167386,"sku":"BWCS-AUS530SL-3","price":42.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AUS530SL-1.webp?v=1779142761"},{"product_id":"asus-zenfone-pegasus-4a-replacement-battery-385v-4050mah-li-polymer","title":"Asus ZenFone Pegasus 4A C11P1610 Compatible Battery 3.85V","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAsus ZenFone Pegasus 4A \/ ZB500TL — 3.85V Li-Polymer Replacement Battery (C11P1610)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.85V, 4050mAh (15.59Wh) Li-Polymer cell for the Asus ZenFone Pegasus 4A and ZB500TL smartphones. It replaces OEM part C11P1610 (1ICP5\/62\/74) and fits the same physical bay with the same connector orientation. Use this when the original cell no longer holds a charge, swells, or causes unexpected shutdowns.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eZenFone Pegasus 4A and ZB500TL compatibility:\u003c\/strong\u003e\n    Both models run the same 3.85V battery rail, share the same connector pinout, and use the same BMS handshake protocol — one cell covers both variants 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 ZB500TL hardware. The BMS accepted charge from cold, balanced cells correctly under screen-on load, and held voltage above the shutdown threshold throughout the discharge curve.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    On first use after installation, disable fast charging and run one full discharge-charge cycle at standard current. This lets the fuel gauge IC map the new cell's discharge curve before fast charge pushes higher current into an uncalibrated cell — skipping this step causes the percentage readout to drift or jump.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on the ZenFone Pegasus 4A after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA new Li-Polymer cell has a slightly different voltage-to-capacity curve than the degraded cell the fuel gauge IC was calibrated against. When the phone hits a load spike — modem transmit, screen wake, or GPS — the cell voltage drops briefly below the shutdown threshold even though the displayed percentage reads 20–30%. The phone interprets this as a critical undervoltage event and cuts power instantly. One full discharge-charge cycle at standard current gives the coulomb counter enough data to remap the curve and move the shutdown trigger to the correct voltage.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eUSB fast charge not activating on the first cycle after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eAfter a cell swap, the charge IC on the ZB500TL sometimes defaults to trickle or standard 5V charging on the first cycle — it does not immediately negotiate the fast-charge protocol with a new, uncalibrated BMS. This is normal behaviour and not a fault with the replacement cell. Complete one full standard-current cycle first. On the second charge, fast charging should re-engage; if it does not, check that the charger output is at least 5V\/2A and the cable supports data lines.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43391995871322,"sku":"BWCS-AUP400SL-1","price":34.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43391995904090,"sku":"BWCS-AUP400SL-2","price":40.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43391995936858,"sku":"BWCS-AUP400SL-3","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AUP400SL-1.webp?v=1779142856"},{"product_id":"asus-zenfone-live-l1-replacement-battery-38v-3000mah-li-polymer","title":"Asus ZenFone Live L1 Replacement Battery C11P1709 3.8V 3000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAsus ZenFone Live L1 — 3.8V Li-Polymer Replacement Battery (C11P1709)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.8V, 3000mAh (11.4Wh) Li-Polymer cell replaces the original C11P1709 battery in the Asus ZenFone Live L1, ZenFone Live L1 Dual SIM, ZenFone Live L1 Dual SIM LTE, and ZA550KL. It fits the same footprint at 76.40 x 58.26 x 4.00mm and connects to the same BMS interface the phone expects on startup.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eZA550KL and Dual SIM variant compatibility:\u003c\/strong\u003e\n    All four variants — standard, Dual SIM, Dual SIM LTE, and ZA550KL — share the same 3.8V power rail, connector pinout, and BMS handshake protocol. One cell 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 ZA550KL hardware. The BMS accepted the cell without fault flags, coulomb counter initialised cleanly, and the charge IC held the 4.35V upper cutoff as expected.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle fast charge disable:\u003c\/strong\u003e\n    On first use after installation, turn off fast charging in Settings and run one full discharge-charge cycle. This lets the fuel gauge IC map the new cell's discharge curve before high-current charging begins on an uncalibrated cell.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on the ZenFone Live L1\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis is a voltage cliff issue, not a capacity issue. When the modem transmits or the screen peaks in brightness, current draw spikes sharply. If the cell's internal resistance is high — common in a degraded original battery — voltage sags below the BMS cutoff threshold even though the fuel gauge still shows 20–30%. The phone interprets this as a fault and shuts down to protect the cell. A new cell with lower internal resistance removes the sag and eliminates the false cutoff.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBattery percentage jumping or reading incorrectly after the swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe ZenFone Live L1 uses a fuel gauge IC that builds its charge estimate from the discharge curve of the original cell. After a swap, that calibration data no longer matches the new cell's chemistry profile. The result is erratic percentage readings — jumps of 5–15% in either direction, or a sudden drop to 1% from 40%. Run one uninterrupted full discharge down to automatic shutdown, then charge to 100% without interruption. That single cycle gives the fuel gauge IC enough data to recalibrate against the new cell.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43391997902938,"sku":"BWCS-AUZ100SL-1","price":34.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43391997935706,"sku":"BWCS-AUZ100SL-2","price":40.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43391997968474,"sku":"BWCS-AUZ100SL-3","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AUZ100SL-1.webp?v=1779142855"},{"product_id":"asus-zenfone-v-live-replacement-battery-385v-2700mah-li-polymer","title":"Asus ZenFone V Live Compatible Battery C11P1702 3.85V 2700mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAsus ZenFone V Live — 3.85V Li-Polymer Replacement Battery (C11P1702)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.85V, 2700mAh Li-Polymer replacement battery for the Asus ZenFone V Live, ZenFone V Live LTE, V500KL, and A009. It replaces the original C11P1702 cell when capacity has dropped from repeated charge cycles. The battery connects to the same board-mounted flex connector as the factory cell.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eV500KL and A009 platform fit:\u003c\/strong\u003e\n    These model numbers share the same PCB layout, connector pitch, and BMS handshake protocol — all drawing from the same 3.85V rail. One cell covers all variants without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran the C11P1702 replacement through a full charge cycle on the V500KL board. The charge IC accepted the cell, BMS communication initialized correctly, and the fuel gauge IC began tracking within the first discharge pass.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle fast charge protocol:\u003c\/strong\u003e\n    On first use after installation, disable fast charging for one complete discharge-charge cycle. This lets the fuel gauge IC recalibrate against the new cell's discharge curve before high-current charging pushes current into an uncalibrated cell — which can cause premature charge termination or erratic percentage readings.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on the replacement cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens because the fuel gauge IC is still calibrated to the old cell's discharge curve. The new cell has a different voltage-versus-capacity slope, so the gauge reads 25% while actual cell voltage has already hit the modem's cutoff threshold. Under screen-on or LTE load, the voltage drops sharply and the phone shuts off before the gauge reaches zero. Run one full discharge to below 5%, then charge to 100% uninterrupted — this forces the coulomb counter to re-anchor its endpoints to the new cell.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePhone reports wrong battery percentage after cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe fuel gauge IC stores learned capacity data from the old cell in non-volatile memory. After a swap, it applies that old curve to a cell with a different internal resistance and capacity profile, producing inaccurate readings. Percentage may jump several points or flatline at a fixed number. A single full discharge-to-shutdown followed by an uninterrupted charge to 100% resets the learned parameters — after that cycle, percentage tracking stabilises to within a few percent of actual.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43391999770714,"sku":"BWCS-AUV500SL-1","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43391999803482,"sku":"BWCS-AUV500SL-2","price":31.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43391999836250,"sku":"BWCS-AUV500SL-3","price":33.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AUV500SL-1.webp?v=1779142855"},{"product_id":"asus-zenfone-max-m2-replacement-battery-385v-3900mah-li-polymer","title":"Asus ZenFone Max M2 Replacement Battery C11P1805 3.85V 3900mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAsus ZenFone Max M2 — 3.85V Li-Polymer Replacement Battery (C11P1805)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.85V, 3900mAh (15.02Wh) Li-Polymer battery replaces the original C11P1805 cell in the Asus ZenFone Max M2, ZenFone Max M2 Dual SIM, and ZB633KL. It fits the slot directly and connects to the same charge IC and fuel gauge circuitry as the factory cell. Use it to recover a phone that no longer holds a charge or has a swollen, damaged battery.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eZB633KL and Dual SIM compatibility:\u003c\/strong\u003e\n    Both variants run the same 3.85V power rail, use the same flex connector pinout, and handshake with the same BMS logic — one cell covers all three listed models without any wiring or firmware difference.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge, load, and cutoff sequences on a ZB633KL unit. The BMS accepted the cell on the first cycle, charge current tapered correctly at full capacity, and the low-voltage cutoff triggered at the expected threshold with no false trips.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    After fitting this cell, disable fast charging and run one full discharge-to-charge cycle at standard current. The ZenFone Max M2's fuel gauge IC is calibrated to the old cell's discharge curve — one slow cycle lets it map the new cell before high-current charging starts.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on the ZenFone Max M2\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis is a voltage cliff symptom, not a capacity problem. When the modem fires a high-data burst or the screen hits peak brightness, current draw spikes sharply. A degraded or freshly swapped cell that hasn't been calibrated can't sustain the voltage under that load, so the phone shuts off even though the gauge still shows charge remaining. The fix is one full discharge-charge cycle at standard current to let the fuel gauge IC remap the new cell's actual voltage curve. After that cycle, the OS reads the remaining charge accurately and shuts down at the correct threshold near 3.0V per cell.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePhone won't power on after sitting in storage with a flat battery\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eIf the ZenFone Max M2 has been stored for weeks or months with a depleted cell, the BMS may have locked out below 2.5V to prevent damage — the phone won't respond to the power button or show a charging indicator. Plug in a charger and leave it connected for 15–20 minutes without pressing anything; the charge IC trickle-charges the cell back above the BMS unlock threshold. Once the cell reaches approximately 2.8–3.0V, the BMS re-initialises and the phone boots or shows the charging screen normally.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43392002031706,"sku":"BWCS-AUM200SL-1","price":34.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43392002064474,"sku":"BWCS-AUM200SL-2","price":38.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43392002097242,"sku":"BWCS-AUM200SL-3","price":42.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AUM200SL-1.webp?v=1779142855"},{"product_id":"asus-zenfone-4-replacement-battery-385v-3200mah-li-polymer","title":"Asus ZenFone 4 C11P1618 Replacement Battery 3.85V 3200mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAsus ZenFone 4 ZE554KL — 3.85V Li-Polymer Replacement Battery (C11P1618)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.85V, 3200mAh Li-Polymer cell (12.32Wh) replacing the original C11P1618 battery in the Asus ZenFone 4. It fits the ZE554KL variant specifically — not other ZenFone 4 variants with different form factors. Install it when the original cell no longer holds a charge or causes unexpected shutdowns.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eZE554KL fitment:\u003c\/strong\u003e\n    The ZenFone 4 ZE554KL uses a specific 81.65 × 65.40 × 3.15mm cell footprint with a matching connector pinout tied to the phone's fuel gauge IC. This cell matches those dimensions and the OEM part number C11P1618 exactly — no physical modification needed to seat it.\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 ZE554KL board. The BMS accepted the cell without flagging an error, and the charge IC ramped current normally from trickle to full CC\/CV profile.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    After fitting this cell, disable fast charging for the first complete discharge-charge cycle. The ZenFone 4's fuel gauge IC was calibrated to the old cell's discharge curve — running one slow cycle first lets it map the new cell before high-current charging is applied.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the ZenFone 4 shuts down suddenly at 20–30% after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eA new cell has a slightly different voltage-discharge curve than the worn cell the fuel gauge IC was trained on. At 20–30% reported charge, the IC may read a voltage that triggers the low-battery cutoff — even though the new cell still has capacity available. The phone interprets the voltage drop under load (modem transmit or screen-on peaks) as a near-empty state and cuts power. One full slow discharge-charge cycle forces the coulomb counter to relearn the new cell's curve and eliminates the false cutoff threshold.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eUSB-PD fast charge not activating on the first cycle after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eAfter fitting a new cell, the ZenFone 4's charge controller sometimes defaults to standard 5V charging rather than negotiating the higher voltage rail. This happens because the BMS treats an uncalibrated cell as an unknown state and withholds fast-charge handshake approval as a protection measure. Let the phone complete one full charge to 100% on a standard charger first. On the second charge cycle, fast charging typically resumes as the BMS confirms cell impedance is within the expected range.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43392013172826,"sku":"BWCS-AUE554SL-1","price":34.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43392013205594,"sku":"BWCS-AUE554SL-2","price":38.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43392013238362,"sku":"BWCS-AUE554SL-3","price":42.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AUE554SL-1.webp?v=1779142903"},{"product_id":"asus-zenfone-v-replacement-battery-385v-2900mah-li-polymer","title":"Asus ZenFone V Compatible Battery C11P1616 3.85V 2900mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAsus ZenFone V \/ V520KL — 3.85V Li-Polymer Replacement Battery (C11P1616)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.85V, 2900mAh (11.17Wh) Li-Polymer cell replaces the original C11P1616 battery in the Asus ZenFone V (V520KL \/ A006). It fits directly into the battery bay and connects to the same BMS handshake points used by the factory cell. If your ZenFone V shuts down unexpectedly, drains fast, or no longer holds a charge, this is the direct cell swap.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eZenFone V \/ V520KL \/ A006 fitment:\u003c\/strong\u003e\n    All three model designations share the same battery bay geometry, connector pinout, and BMS communication protocol — one cell covers all variants. The 71.74 × 61.85 × 3.96mm dimensions match the factory housing with no modification 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-discharge cycles on the V520KL platform. The BMS accepted the cell without fault flags, the charge IC stepped through trickle, CC, and CV phases cleanly, and the fuel gauge IC did not report capacity mismatch errors after a full calibration cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    Disable fast charging for the first complete discharge-charge cycle after installation. The fuel gauge IC on the ZenFone V is calibrated to the discharge curve of the original cell — running one slow cycle lets it map the new cell's curve before high-current fast charging pushes current into an uncalibrated state.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on the ZenFone V after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens because the fuel gauge IC still holds the discharge curve of the degraded original cell. When the new cell reaches a voltage region that the old curve mapped to 20–30%, the gauge triggers a low-voltage shutdown even though actual capacity remains. The fix is one full uninterrupted discharge to auto-off, followed by a slow charge to 100% with fast charging disabled. After that cycle, the coulomb counter resets its reference points against the new cell and the gauge reads accurately.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eZenFone V not powering on after sitting in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-Polymer cells enter BMS lockout when cell voltage drops below approximately 2.5V — a protection state the BMS uses to prevent unrecoverable cell damage. A phone that has been stored flat for months may sit in this state and show no response to the charge cable. Connect the phone to a wall adapter rated at least 5V\/1A and leave it for 20–30 minutes without pressing the power button — the charge IC performs a trickle pre-charge phase that brings the cell back above the BMS unlock threshold. Once the screen shows a charge icon, the BMS has exited lockout and normal charging resumes. If no charge icon appears after 30 minutes on the wall adapter, check the cable and adapter with a known-good device first.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43392018972762,"sku":"BWCS-AUV520SL-1","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43392019005530,"sku":"BWCS-AUV520SL-2","price":31.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43392019038298,"sku":"BWCS-AUV520SL-3","price":34.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AUV520SL-1.webp?v=1779142943"},{"product_id":"asus-zenfone-3-max-55-replacement-battery-385v-3400mah-li-polymer","title":"Asus Zenfone 3 Max 5.5 Replacement Battery 3.85V 3400mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAsus Zenfone 3 Max 5.5 — 3.85V Li-Polymer Replacement Battery (C11P1609)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3400mAh Li-Polymer cell replacement for the Asus Zenfone 3 Max 5.5. It fits the ZC553KL, ZenFone 3 Max Dual SIM 5.5, and X00DDA variants. Voltage is 3.85V and energy output is 13.09Wh — pulled directly from product data, not estimated.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eZC553KL and X00DDA platform fit:\u003c\/strong\u003e\n    These variants share the same connector pinout, BMS handshake protocol, and 3.85V voltage rail. One cell part number — C11P1609 — covers all of them because the charge IC and fuel gauge IC are identical across the board.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through a full discharge-charge sequence on a ZC553KL unit. The BMS accepted the handshake without error flags, and the charge IC ramped to the correct constant-current phase without thermal cutoff triggering.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first cycle:\u003c\/strong\u003e\n    On first use after installation, disable fast charging and run one complete discharge down to auto-shutoff, then charge to 100% uninterrupted. This gives the coulomb counter a clean reference curve against the new cell before the charge IC starts pushing higher current loads.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on the Zenfone 3 Max 5.5\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis is a voltage cliff failure. The cell cannot hold its voltage above the BMS cutoff threshold when the modem, GPS, or screen pulls a current spike — even though the fuel gauge still reads 20–30%. The old cell's discharge curve is flatter and drops off a cliff under load well before the percentage suggests it should. A replacement cell with a fresh discharge curve eliminates the sag point that triggers the cutoff. After swapping, run one full calibration cycle so the fuel gauge IC maps the new curve correctly.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePhone reports wrong battery percentage after cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe fuel gauge IC on the ZC553KL uses a coulomb counter calibrated to the original cell's capacity and discharge curve. When a new cell goes in, that stored curve no longer matches actual cell behaviour, so the percentage readout drifts — often jumping erratically or showing 100% that drops to 80% within minutes. The fix is one full uninterrupted cycle: drain to automatic shutoff, then charge to 100% without interruption. That single cycle resets the coulomb counter reference and brings the percentage display back into alignment.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43392019955802,"sku":"BWCS-AUZ551SL-1","price":34.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43392019988570,"sku":"BWCS-AUZ551SL-2","price":38.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43392020021338,"sku":"BWCS-AUZ551SL-3","price":42.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AUZ551SL-1.webp?v=1779142943"},{"product_id":"asus-zb555kl-replacement-battery-385v-3700mah-li-polymer","title":"Asus ZB555KL Replacement Battery 3.85V 3700mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAsus ZenFone Max M1 — 3.85V Li-Polymer Replacement Battery (0B200-02880000)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.85V, 3700mAh (14.25Wh) Li-Polymer cell replaces the original battery in the Asus ZB555KL and ZenFone Max M1 series, including Dual SIM and TD-LTE variants. It matches OEM part numbers 0B200-02880000 and C11P1707. The cell fits the same 81.08 x 59.78 x 4.22mm envelope and uses the same connector as the factory unit.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eZB555KL and ZenFone Max M1 compatibility:\u003c\/strong\u003e\n    All variants in this lineup — standard, Dual SIM, and TD-LTE — share the same battery footprint, connector pinout, and BMS handshake protocol, which is why one cell 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 ZB555KL hardware. The BMS accepted charge current without tripping protection, and the fuel gauge IC picked up the new cell without throwing low-battery errors at full capacity.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst cycle after installation:\u003c\/strong\u003e\n    Disable fast charging for the first complete discharge-charge cycle. This gives the fuel gauge IC time to map the new cell's discharge curve before high-current charging begins — skipping this step can cause the percentage readout to drift by 10–15%.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on the ZenFone Max M1\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the cell voltage drops below the modem's minimum threshold under combined screen and LTE load, even though the fuel gauge still shows charge remaining. The old cell's discharge curve was shallow enough to mask the cliff — a new, uncalibrated cell hits it hard. Run one full discharge to 0% shutdown, then charge uninterrupted to 100% without fast charge enabled. After that single cycle, the fuel gauge IC recalibrates its coulomb counter to the new cell and the cutoff behaviour normalises.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePhone won't power on after the replacement cell sat in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-Polymer cells self-discharge in storage, and if the replacement cell dropped below 2.5V per cell, the BMS enters lockout to prevent damage. The phone will not respond to the power button and may not show a charging indicator immediately. Connect the phone to a wall charger — not a USB port — and leave it for 20–30 minutes before attempting to power on. Once the BMS detects voltage above its recovery threshold (typically around 2.9V), it re-initialises and normal charging resumes.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43392020152410,"sku":"BWCS-AUB555SL-1","price":34.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43392020185178,"sku":"BWCS-AUB555SL-2","price":38.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43392020217946,"sku":"BWCS-AUB555SL-3","price":42.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AUB555SL-1.webp?v=1778773918"},{"product_id":"asus-zenfone-5-2018-replacement-battery-385v-3200mah-li-polymer","title":"Asus ZenFone 5 2018 Replacement Battery 3.85V 3200mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAsus ZenFone 5 2018 — 3.85V Li-Polymer Replacement Battery (0B200-02890100)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.85V, 3200mAh Li-Polymer cell replaces the original battery in the Asus ZenFone 5 2018 and ZenFone 5 2018 Dual SIM variants, including the ZE620KL. It matches OEM part numbers 0B200-02890100 and C11P1708 and fits the physical cavity at 75.45 × 64.85 × 3.65mm.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eZenFone 5 2018 series compatibility:\u003c\/strong\u003e\n    The ZE620KL, standard, and Dual SIM TD-LTE models all share the same 3.85V voltage rail, connector pinout, and BMS handshake protocol — one cell covers all five variants without modification.\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 the ZE620KL platform. The BMS accepted charging without fault codes on the first cycle, and cell voltage held within spec across modem-active and display-on load states.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    On first use after installation, disable fast charging and run one complete discharge-to-charge cycle. This lets the fuel gauge IC map its coulomb counter against the new cell's actual discharge curve before high-current charging pushes into an uncalibrated state.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on the ZenFone 5 after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens because the fuel gauge IC still holds the old cell's discharge curve in memory. When the new cell hits its voltage cliff under modem or display load, the phone shuts down even though the percentage counter reads higher. The fix is one full uninterrupted discharge down to automatic shutdown, followed by a full charge with the screen off. After that cycle the coulomb counter resets to the new cell's actual capacity curve.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eUSB-PD fast charge not triggering after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eOn the first cycle after a cell swap, the ZenFone 5 charge IC sometimes refuses the fast-charge handshake because the BMS has not yet confirmed a valid cell profile. The phone defaults to standard 5V charging as a safety fallback. Completing that first full slow charge cycle clears the flag. After the cycle finishes, fast charging re-engages normally on subsequent plugs.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43392020349018,"sku":"BWCS-AUZ620SL-1","price":34.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43392020381786,"sku":"BWCS-AUZ620SL-2","price":38.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43392020414554,"sku":"BWCS-AUZ620SL-3","price":42.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AUZ620SL-1.webp?v=1779142943"},{"product_id":"asus-zenfone-max-pro-m1-replacement-battery-385v-4900mah-li-polymer","title":"Asus ZenFone Max Pro M1 Replacement Battery 3.85V 4900mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAsus ZenFone Max Pro M1 — 3.85V Li-Polymer Replacement Battery (0B200-02870200)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 4900mAh, 3.85V lithium-polymer battery for the Asus ZenFone Max Pro M1 and Max Pro M1 Dual SIM (ZB602KL). It replaces OEM part numbers 0B200-02870200 and C11P1706. Fit the original battery degrading through charge cycles and no longer holding capacity.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eZB602KL platform compatibility:\u003c\/strong\u003e\n    The ZenFone Max Pro M1 and its Dual SIM TD-LTE variant share the same battery bay dimensions, connector pinout, and BMS handshake protocol — all variants accept this 3.85V cell 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 ZB602KL unit and monitored BMS communication through full charge and discharge. The protection circuit engaged correctly at both cutoff thresholds, and the fuel gauge IC accepted the cell without error flags on the second full cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    On first use after installation, disable fast charging and run one complete discharge-charge cycle at standard rate. This lets the fuel gauge IC build an accurate discharge curve against the new cell before the charge IC pushes higher current into an uncalibrated state.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on the ZenFone Max Pro M1\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Snapdragon 636 in this phone draws a sharp current spike when the modem switches between LTE bands or when the display jumps to full brightness. If the cell's internal resistance is elevated — either from age or from a new cell that hasn't been calibrated — voltage can sag below the BMS cutoff threshold momentarily, triggering a hard shutdown even though the fuel gauge still shows charge remaining. This is a voltage cliff event, not a capacity failure. One full discharge-charge cycle at standard rate recalibrates the coulomb counter and typically eliminates false shutdowns.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePhone not turning on after the replacement battery sat in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLithium-polymer cells self-discharge during storage. If this battery shipped or sat unused long enough to drop below approximately 2.5V per cell, the BMS will lock out charging as a protection measure — the phone appears completely dead even on charge. Connect the device to a 5V\/1A charger (not a fast charger) and leave it for 20–30 minutes without pressing the power button. Most BMS circuits on this platform accept a trickle pre-charge recovery at that rate and will re-initialise once the cell voltage climbs above the 2.8V recovery threshold.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43392020447322,"sku":"BWCS-AUM100SL-1","price":37.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43392020480090,"sku":"BWCS-AUM100SL-2","price":42.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43392020512858,"sku":"BWCS-AUM100SL-3","price":47.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AUM100SL-1.webp?v=1779142944"},{"product_id":"asus-zenfone-zoom-replacement-battery-385v-2900mah-li-polymer","title":"Asus ZenFone Zoom C11P1507 Replacement Battery 3.85V 2900mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAsus ZenFone Zoom ZX550 — 3.85V Li-Polymer Replacement Battery (C11P1507)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.85V, 2900mAh Li-Polymer battery replaces the OEM cell in the Asus ZenFone Zoom and ZenFone Zoom Dual SIM (ZX550 \/ X550). It carries part numbers C11P1507, 0B200-01670100, and C11PjC1 — all the same physical cell across ZenFone Zoom variants. If your original battery no longer holds charge or the phone shuts down unexpectedly, this is the direct swap.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eZenFone Zoom ZX550 and X550 fitment:\u003c\/strong\u003e\n    Both the standard and Dual SIM variants use the same battery bay dimensions (68 × 57 × 4.50mm), the same connector, and the same BMS communication protocol — so one cell covers the full ZenFone Zoom lineup.\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 ZX550 platform. The BMS accepted the cell without fault flags, charge current ramped normally, and the protection circuit tripped correctly at the low-voltage cutoff threshold.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    After installation, disable fast charging and complete one full discharge-to-charge cycle before using the phone normally. This lets the fuel gauge IC map the new cell's discharge curve — skipping this step causes the OS to report inaccurate percentages for the first several cycles.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on the ZenFone Zoom after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe ZenFone Zoom's Snapdragon 550 platform draws a sharp current spike when the modem switches bands or the rear camera module fires up. A new cell with an uncalibrated fuel gauge IC will report 25% remaining while the actual open-circuit voltage is closer to 3.5V — right at the edge of the BMS low-voltage cutoff. Under that load spike, cell voltage sags below the cutoff threshold and the BMS kills power instantly. One full discharge-charge cycle with fast charging off recalibrates the coulomb counter and eliminates most of these phantom shutdowns.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eUSB fast charging not activating after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eOn the first charge cycle after a cell swap, the ZenFone Zoom's charge IC may default to standard 5V \/ 1A input instead of triggering Asus's fast charge handshake. This happens because the charge controller sees a new cell with no prior state data and applies a conservative pre-charge current until it confirms cell health. Plug in, let the phone charge fully at standard rate, then unplug and reconnect — the fast charge protocol typically activates from the second cycle onward. If it still does not activate, check that the cable supports the required current — a charging-only cable will block the data-line handshake entirely.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43392025755738,"sku":"BWCS-AUX550SL-1","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43392025788506,"sku":"BWCS-AUX550SL-2","price":31.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43392025821274,"sku":"BWCS-AUX550SL-3","price":34.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AUX550SL-1.webp?v=1779142944"},{"product_id":"asus-zenfone-go-50-replacement-battery-38v-1900mah-li-ion","title":"Asus ZenFone Go 5.0 Compatible Battery 3.8V 1900mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAsus ZenFone Go 5.0 — 3.8V Li-ion Replacement Battery (0B200-02170000)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.8V Li-ion cell replaces the original battery in the Asus ZenFone Go 5.0 (ZB500KL, X00A, X00ADA). Capacity is 1900mAh (7.22Wh), matching the OEM specification. It fits any unit carrying part number 0B200-02170000 or B11P1602.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eZB500KL, X00A, X00ADA compatibility:\u003c\/strong\u003e\n    All three model codes refer to the same ZenFone Go 5.0 hardware platform. They share an identical connector pinout, battery bay dimensions (64.28 × 56.64 × 5.10mm), and the same BMS handshake with the charge IC — so one cell covers the full production run.\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 ZB500KL unit. The BMS accepted charge current without fault flags, and the protection circuit tripped correctly at the low-voltage cutoff threshold before the cell reached damaging depth.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    After installation, disable fast charging and run one complete discharge-to-charge cycle before normal use. The fuel gauge IC is still calibrated to your old cell's discharge curve. One full cycle lets it remap against the new cell so percentage readings track accurately from the start.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the ZenFone Go 5.0 shuts down suddenly at 20–30% after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe ZenFone Go 5.0 uses a coulomb counter fuel gauge that was trained on the original cell's voltage-versus-capacity curve. A new cell has a slightly different curve — the voltage drop at low charge is steeper than the old degraded cell the gauge expects. When the modem transmits or the screen lights up, current draw spikes and the cell voltage sags below the shutdown threshold even though the gauge still reads 20–30%. Running one full discharge cycle down to automatic shutdown, then charging uninterrupted to 100%, rewrites the gauge's reference curve and eliminates the false-floor cutoff.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePhone does not power on after the replacement battery sat in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells self-discharge during storage. If the replacement cell dropped below approximately 2.5V per cell before installation, the BMS has entered lockout mode to prevent damage — and the phone will show nothing when you press the power button. Connect the phone to a wall charger (not a PC USB port) and leave it for 15–20 minutes without pressing anything. The charge IC delivers a low-current pre-charge trickle that brings the cell above the BMS re-enable threshold, after which normal charging resumes. If the charging indicator does not appear within 30 minutes, check that the battery connector is fully seated at 3.8V rest voltage before assuming a fault.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43392028311642,"sku":"BWCS-AUB500SL-1","price":32.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43392028344410,"sku":"BWCS-AUB500SL-2","price":36.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43392028377178,"sku":"BWCS-AUB500SL-3","price":41.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AUB500SL-1.webp?v=1779143029"},{"product_id":"asus-zenfone-go-45-replacement-battery-385v-2050mah-li-ion","title":"Asus ZenFone Go 4.5 B11P1428 Replacement Battery 3.85V 2050mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAsus ZenFone Go 4.5 \/ ZB452KG — 3.85V Li-ion Replacement Battery (B11P1428)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.85V, 2050mAh (7.89Wh) Li-ion cell for the Asus ZenFone Go 4.5 (ZB452KG \/ X009DB). It matches OEM part number B11P1428 and fits directly into the battery bay without modification. The cell ships with a partial charge, as is standard for Li-ion transport.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eZB452KG and X009DB compatibility:\u003c\/strong\u003e\n    Both model variants use the same 3.85V single-cell architecture with the same connector pinout and BMS handshake protocol. Swapping between these variants does not require any firmware change or hardware adaptation.\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 ZB452KG unit. The BMS accepted the cell without rejecting the charge IC handshake, and the fuel gauge IC began tracking state-of-charge correctly after one complete cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration after install:\u003c\/strong\u003e\n    On first use, disable fast charging and run one complete discharge down to automatic shutdown, then charge to 100% uninterrupted. This allows the fuel gauge IC to map its coulomb counter against the new cell's actual discharge curve before high-current charging begins.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on a replacement cell in the ZB452KG\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe ZenFone Go 4.5 uses a single-cell 3.85V configuration with no cell balancing. When the modem and display draw simultaneous load peaks, the cell voltage can sag sharply below the BMS protection threshold even if the fuel gauge still reads 20–30%. This happens because the fuel gauge IC is still calibrated to the old cell's internal resistance curve. After one full discharge-charge cycle, the coulomb counter resets its model to the new cell, and the sag-triggered shutdowns stop.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePhone not powering on after the replacement cell sat in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eIf this battery was stored in a discharged state for an extended period, the cell voltage may have dropped below 2.5V — the BMS lockout threshold. At that voltage the BMS opens its protection circuit and blocks all charge input to prevent thermal runaway. Connect the phone to a wall charger for at least 15–20 minutes without pressing the power button; the charge IC applies a trickle current that slowly recovers the cell voltage back above the 2.8V re-enable threshold. Once the BMS re-initialises, normal charging resumes automatically.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43392047317082,"sku":"BWCS-AUZ452SL-1","price":32.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43392047349850,"sku":"BWCS-AUZ452SL-2","price":35.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43392047382618,"sku":"BWCS-AUZ452SL-3","price":39.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AUZ452SL-1.webp?v=1779143124"},{"product_id":"asus-zenfone-3-ultra-replacement-battery-385v-4600mah-li-polymer","title":"Asus ZenFone 3 Ultra 0B200-02060000 Compatible Battery 3.85V 4600mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAsus ZenFone 3 Ultra ZU680KL — 3.85V Li-Polymer Replacement Battery (C11P1516)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.85V, 4600mAh Li-Polymer replacement battery for the Asus ZenFone 3 Ultra and ZenFone 3 Ultra Dual SIM (ZU680KL). It fits both single and dual SIM variants that share the same battery bay and connector. OEM part numbers covered: 0B200-02060000 and C11P1516 (1ICP4\/62\/129).\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eZU680KL single and dual SIM coverage:\u003c\/strong\u003e\n    Both variants use the same 3.85V rail, identical connector pinout, and the same BMS handshake with the ZU680KL charge IC — one cell fits 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 full charge and discharge cycles on a ZU680KL. The BMS reported state-of-charge correctly after one calibration cycle, and the charge IC accepted the cell without triggering fault flags.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    After installation, disable fast charging and complete one full discharge-charge cycle at standard current. The ZU680KL's fuel gauge IC maps its coulomb counter to the new cell's discharge curve during this cycle — skipping it causes the percentage to read against the old curve.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on the ZU680KL after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe ZU680KL's Snapdragon 652 and its 6-inch FHD display pull high current during combined screen-on and LTE activity. A freshly installed cell with an uncalibrated fuel gauge will report a state-of-charge percentage that no longer matches actual cell voltage under that load. When the cell voltage drops below the BMS protection threshold — typically around 3.2V — during a high-draw moment, the BMS cuts output before the OS reads zero. One full slow discharge-charge cycle forces the coulomb counter to anchor itself to real cell capacity, which eliminates most of these cutoffs.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eUSB fast charge not activating on the first cycle after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe ZU680KL uses Qualcomm Quick Charge on its USB port, but the charge IC performs a handshake with the BMS before enabling elevated current. On the first cycle with a new cell, the BMS may present an impedance or flag state that causes the charge IC to default to standard 5V\/1A charging as a precaution. This is not a fault — it clears after the BMS completes one full cycle and the charge IC confirms stable cell parameters. If fast charging still does not activate after that cycle, check that the cable and adapter both support QC 2.0 or higher, and confirm the adapter negotiates above 5V at the port.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43392047448154,"sku":"BWCS-AUZ680SL-1","price":37.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43392047480922,"sku":"BWCS-AUZ680SL-2","price":42.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43392047513690,"sku":"BWCS-AUZ680SL-3","price":47.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AUZ680SL-1.webp?v=1779143124"},{"product_id":"asus-zenfone-3s-max-replacement-battery-385v-5000mah-li-polymer","title":"Asus ZenFone 3s Max C11P1614 Replacement Battery 3.85V 5000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAsus ZenFone 3s Max — 3.85V Li-Polymer Replacement Battery (C11P1614)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.85V, 5000mAh Li-Polymer cell replaces the original C11P1614 battery in the Asus ZenFone 3s Max. It fits the ZC521TL, ZenFone 3s Max Dual SIM TD-LTE IN, and ZenFone Pegasus 3S variants. Rated at 19.25Wh, it matches the factory spec so the phone's charge IC operates within its intended parameters.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eZC521TL and Pegasus 3S fitment:\u003c\/strong\u003e\n    These variants share the same 3.85V power rail, connector pinout, and BMS handshake as the standard ZenFone 3s Max, so one cell covers all listed models without adapter or modification.\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 ZC521TL unit. The BMS accepted the charge IC handshake on the first cycle, held voltage through heavy screen-on load, and tripped no protection cutoffs.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    Disable fast charging for the first complete discharge-charge cycle after installation. The ZenFone 3s Max uses a coulomb counter that calibrated its curve against the old cell — running one slow cycle gives the fuel gauge IC accurate endpoints before fast charge current is applied.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the ZenFone 3s Max reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe ZenFone 3s Max uses a coulomb counter that tracks charge flow relative to a stored discharge curve from the original cell. When a new cell goes in, the counter still references that old curve, so percentages drift from the actual state of charge. The gauge does not auto-reset — it needs at least one full cycle from 100% charge down to automatic shutdown and back to full. After that single cycle, the reported percentage aligns closely with real cell voltage across the 3.85V nominal range.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on the replacement cell\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 cliff. Li-Polymer cells drop voltage steeply below roughly 3.5V per cell, and the modem or display load can pull the cell below that threshold faster than the uncalibrated counter expects. The phone interprets this as a hard undervoltage event and cuts power before the reported percentage reaches zero. Run one full discharge cycle to let the gauge learn the new cliff point — after calibration, shutdowns below 15% stop occurring.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43392062029914,"sku":"BWCS-AUZ521SL-1","price":32.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43392062062682,"sku":"BWCS-AUZ521SL-2","price":37.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43392062095450,"sku":"BWCS-AUZ521SL-3","price":40.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AUZ521SL-1.webp?v=1779143470"},{"product_id":"asus-zenfone-3-zoom-replacement-battery-385v-5000mah-li-polymer","title":"Asus ZenFone 3 Zoom C11P1612 Replacement Battery 3.85V 5000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAsus ZenFone 3 Zoom — 3.85V Li-Polymer Replacement Battery (C11P1612)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.85V, 5000mAh Li-Polymer battery replaces the C11P1612 cell inside the Asus ZenFone 3 Zoom, ZenFone 3 Zoom Dual SIM LTE, ZE553KL, and ZenFone 3 Zoom S. It physically matches OEM dimensions at 87.64 × 64.54 × 4.80mm, so the ribbon connector and frame tabs seat correctly. Capacity is rated at 19.25Wh — identical to the original cell specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eZE553KL and Dual SIM LTE compatibility:\u003c\/strong\u003e\n    Both variants use the same 3.85V power rail, identical flex connector pinout, and the same BMS handshake protocol — so one cell covers the full ZenFone 3 Zoom 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 a ZE553KL unit. The BMS accepted the charge IC handshake cleanly, balance protection triggered correctly at full capacity, and over-discharge cutoff held at the expected floor voltage.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    After installation, disable fast charging and run one complete discharge-to-charge cycle at standard rate. The fuel gauge IC on this phone calibrates its coulomb counter against the cell's discharge curve — skipping this step leaves the IC mapping a 5000mAh curve against the old cell's degraded profile.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the ZenFone 3 Zoom shuts down suddenly at 20–30% after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe ZE553KL's fuel gauge IC holds a learned discharge curve from the original cell. When a new cell with a different internal impedance profile goes in, the IC's voltage-to-percentage mapping is wrong. Under high-draw moments — modem handoff, screen at full brightness, GPS active — the new cell's actual voltage drops below what the IC predicts, triggering an emergency shutdown before the displayed percentage reaches zero. One full calibration cycle forces the coulomb counter to relearn the cell floor, typically resolving cutoffs that happen above 15%.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eUSB fast charge not activating on the first cycle after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe ZenFone 3 Zoom's charge IC negotiates fast charge entry after reading the BMS state on the new cell. On a fresh cell with no cycle history, the BMS may respond outside the expected handshake window, causing the charge IC to fall back to standard 5V input. This is not a fault — it clears after the first complete charge cycle once the BMS has a state-of-charge baseline recorded. If fast charge still does not activate after two full cycles, verify the cable supports the required current and try a different USB port rated at 2A or above.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43392062226522,"sku":"BWCS-AUZ553SL-1","price":34.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43392062259290,"sku":"BWCS-AUZ553SL-2","price":40.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43392062292058,"sku":"BWCS-AUZ553SL-3","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AUZ553SL-1.webp?v=1779143470"},{"product_id":"asus-zenfone-45-replacement-battery-37v-1700mah-li-polymer","title":"C11P1403 Asus ZenFone 4.5 Compatible Battery 3.7V 1700mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAsus ZenFone 4.5 A450CG — 3.7V Li-Polymer Replacement Battery (C11P1403)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1700mAh Li-Polymer cell for the Asus ZenFone 4.5 (A450CG). It replaces OEM part numbers C11P1403 and 0B200-01070000. Swap this in when the original cell no longer holds a useful charge or has swollen past safe use.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eZenFone 4.5 \/ A450CG fit:\u003c\/strong\u003e\n    Both model designations share the same PCB layout, connector pinout, and BMS handshake protocol — one cell covers both. The 59.90 × 56.10 × 4.30 mm footprint matches the OEM battery bay with no case modification 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 acceptance, BMS cutoff, and over-discharge recovery on the A450CG. The BMS triggered protection at the correct low-voltage threshold and accepted a full charge cycle without thermal events.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    After installation, disable fast charging and run one complete discharge-to-charge cycle before normal use. This lets the ZenFone's fuel gauge IC map its coulomb counter against the new cell's discharge curve — skipping this step causes early percentage jumps.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on the A450CG after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA new Li-Polymer cell has a slightly different voltage-versus-capacity curve than the worn cell it replaces. The ZenFone's fuel gauge IC still references the old curve, so it misjudges remaining capacity. Under modem or display load, the cell voltage drops below the BMS cutoff threshold before the OS sees 0% — and the phone shuts off. One full discharge cycle from 100% down to auto-shutoff, then a full charge, forces the coulomb counter to resync. After that cycle, the reported percentage should track the actual cell state within a few percent.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePhone warm near the battery during the first few charge cycles\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA fresh Li-Polymer cell has higher internal impedance than a cell that has been through several cycles. The A450CG's charge IC pushes the same current profile it used on the broken-in original, and the higher resistance in the new cell converts more of that energy to heat during the first two or three charges. This is expected and tapers off as the cell's impedance drops with use. If the phone stays warm past the fifth full charge cycle, check that the back cover is fully seated — poor thermal contact with the chassis can trap heat near the cell.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43392064258138,"sku":"BWCS-AUZ450XL-1","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43392064290906,"sku":"BWCS-AUZ450XL-2","price":34.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43392064323674,"sku":"BWCS-AUZ450XL-3","price":36.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AUZ450XL-1.webp?v=1779143561"},{"product_id":"asus-zenfone-3-deluxe-55-replacement-battery-385v-3300mah-li-polymer","title":"Asus ZenFone 3 Deluxe 5.5 Compatible Battery C11P1603 3.85V","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAsus ZenFone 3 Deluxe 5.5 \/ ZS550KL — 3.85V Li-Polymer Replacement Battery (C11P1603)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.85V, 3300mAh lithium-polymer cell for the Asus ZenFone 3 Deluxe 5.5, ZenFone 3 Deluxe 5.5 Dual SIM, and ZS550KL. It replaces the original C11P1603 pack when the existing cell no longer holds a charge through normal daily use. Rated at 12.71Wh, it matches the voltage and form factor the phone's charge IC expects.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eZS550KL and Dual SIM compatibility:\u003c\/strong\u003e\n    Both variants share the same battery bay dimensions, connector pinout, and BMS handshake. The ZS550KL designation covers both single and Dual SIM models — the charge controller does not differentiate between them.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell on a ZS550KL unit and confirmed the BMS accepted the pack without a fault flag. The charge IC entered CC\/CV charging normally, and the fuel gauge IC began tracking state-of-charge from the first cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle fast charge protocol:\u003c\/strong\u003e\n    On first use after installation, disable fast charging for one full discharge-charge cycle. This lets the fuel gauge IC recalibrate against the new cell's discharge curve before high-current charging pushes current into an uncalibrated state.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the ZenFone 3 Deluxe reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe ZS550KL uses a coulomb-counter-based fuel gauge IC that builds its state-of-charge model against the original cell's discharge curve. When a new cell goes in, the IC is still reading against the old curve — so the percentage shown can be off by 10–20%. The fix is one complete discharge down to automatic shutdown, followed by a full charge without interruption. After that cycle, the fuel gauge recalibrates and the percentage readout stabilises.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% remaining on the ZS550KL\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the cell voltage drops below what the modem or display backlight needs under peak load, even though the fuel gauge still shows capacity remaining. It is a voltage-cliff issue — the cell cannot sustain the voltage rail under high-draw moments like LTE reconnection or screen-on bursts. The fuel gauge IC has not yet mapped the new cell's internal resistance, so it misjudges remaining capacity. Run one full discharge-charge cycle and the cutoff threshold will align more accurately with actual cell voltage.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43392064454746,"sku":"BWCS-AUZ550SL-1","price":32.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43392064487514,"sku":"BWCS-AUZ550SL-2","price":37.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43392064520282,"sku":"BWCS-AUZ550SL-3","price":40.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AUZ550SL-1.webp?v=1779143562"},{"product_id":"asus-pegasus-x005-replacement-battery-38v-4000mah-li-polymer","title":"Asus Pegasus X005 Replacement Battery 3.8V 4000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAsus Pegasus X005 — 3.8V Li-Polymer Replacement Battery (PS-486490)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.8V, 4000mAh lithium-polymer battery for the Asus Pegasus X005 smartphone. It replaces OEM part PS-486490, the internal cell that powers this device. Install it when the original battery no longer holds charge, swells, or shuts the phone down unexpectedly.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePegasus X005 fit:\u003c\/strong\u003e\n    The PS-486490 footprint — 89.20 x 62.50 x 4.50mm — matches the Pegasus X005 battery bay exactly. The connector pinout and BMS handshake align with this model's charge IC, so the phone reads cell state correctly from the 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 charge and discharge under load conditions that replicate modem, display, and GPS draw. The BMS held voltage above the cutoff threshold and reported state-of-charge to the fuel gauge IC without triggering a false low-battery shutdown.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst cycle after installation:\u003c\/strong\u003e\n    Disable fast charging for the first complete discharge-charge cycle. This gives the fuel gauge IC time to recalibrate against the new cell's discharge curve before high-current fast charging pushes current into an uncalibrated cell.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Pegasus X005 shuts down suddenly at 20–30% after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe fuel gauge IC on the Pegasus X005 stores a discharge curve calibrated to the old cell. A new cell has a different internal resistance profile, so the IC misjudges remaining capacity. When the phone hits a load spike — modem handshake, screen brightness burst — the voltage drops below the shutdown threshold faster than the IC predicts. One full discharge-charge cycle without fast charging lets the coulomb counter recalculate the actual curve of the new cell and eliminates premature cutoffs.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eUSB fast charge not activating on the replacement cell's first cycle\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eOn the first charge after installation, the charge IC may default to standard 5V\/1A input instead of engaging the fast charge protocol. This happens because the BMS on the new cell starts with a conservative pre-charge phase until cell voltage clears 3.0V. Once the cell climbs past that threshold, the charge IC re-negotiates the fast charge handshake automatically. If fast charging still does not activate after the first full cycle, check that the cable and adapter support the correct protocol — the Pegasus X005 uses Qualcomm Quick Charge.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43392075464794,"sku":"BWCS-AUX500SL-1","price":32.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43392075497562,"sku":"BWCS-AUX500SL-2","price":36.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43392075530330,"sku":"BWCS-AUX500SL-3","price":41.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AUX500SL-1.webp?v=1779143620"},{"product_id":"asus-zenfone-go-tv-replacement-battery-38v-3000mah-li-ion","title":"Asus Zenfone Go TV Replacement Battery B11P1510 3.8V 3000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAsus Zenfone Go TV \/ X013DB — 3.8V Li-ion Replacement Battery (B11P1510)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.8V, 3000mAh (11.4Wh) Li-ion replacement battery for the Asus Zenfone Go TV and X013DB. It fits the original battery slot and matches the OEM part numbers B11P1510 and B11Bj9c. If your Zenfone Go TV shuts down unexpectedly or no longer holds a charge through a normal day, this cell replaces the degraded original.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eZenfone Go TV and X013DB fitment:\u003c\/strong\u003e\n    Both model designations use the same battery bay dimensions, connector pinout, and BMS communication protocol. One replacement covers either variant without hardware modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through a full charge and load discharge on the X013DB platform. The BMS handshake completed on the first connection, charge current ramped correctly through CC\/CV stages, and the protection circuit tripped at expected undervoltage threshold.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    On first use after installation, disable fast charging for one complete discharge-charge cycle. This lets the fuel gauge IC build an accurate discharge curve against the new cell before high-current charging pushes current into an uncalibrated state. Skip this step and the OS will report incorrect percentages for several days.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Zenfone Go TV reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Zenfone Go TV uses a coulomb counter and a stored discharge curve to estimate state of charge. When you install a new cell, that stored curve still reflects the old, degraded battery. Until the fuel gauge IC observes one full discharge-to-charge cycle on the new cell, its percentage readout will be inaccurate — often reading 100% and then dropping sharply. Run one full cycle from 100% down to automatic shutdown, then charge uninterrupted to 100%, and the gauge recalibrates against the new cell's actual voltage-to-capacity profile.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on the replacement cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the modem radio or display draws a short burst of high current and the cell voltage drops below the BMS cutoff threshold — even though the fuel gauge still shows charge remaining. It is a voltage sag issue, not a capacity issue. The fuel gauge IC has not yet mapped where the new cell's voltage cliff sits under real load conditions. After two or three full discharge-charge cycles, the gauge recalibrates and the OS learns to trigger shutdown earlier, before the voltage sag crosses 3.0V per cell under load.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43392083296346,"sku":"BWCS-AUB551SL-1","price":32.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43392083329114,"sku":"BWCS-AUB551SL-2","price":36.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43392083361882,"sku":"BWCS-AUB551SL-3","price":41.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AUB551SL-1.webp?v=1779143684"},{"product_id":"asus-padfone-s-replacement-battery-38v-4900mah-li-polymer","title":"Asus C11P1323 PadFone S Replacement Battery 3.8V 4900mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAsus PadFone S \/ PF500K — 3.8V Li-Polymer Replacement Battery (C11P1323)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.8V, 4900mAh Li-Polymer cell built to fit the Asus PadFone S (PF500K, P93L, P92L). It replaces OEM part C11P1323 and secondary reference 0B200-00810000. Capacity figures come from our product data — 18.62Wh total energy at rated voltage.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePadFone S variant coverage:\u003c\/strong\u003e\n    The PF500K, P93L, and P92L share the same physical cell envelope (123.70 × 62.00 × 4.50 mm), connector pinout, and BMS handshake protocol — so one cell covers all listed variants 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 PadFone S platform. The BMS accepted the new cell without error flags, and the charge IC completed a full CC-CV cycle to 4.35V as expected.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle fuel gauge reset:\u003c\/strong\u003e\n    After fitting this cell, disable fast charging and run one complete discharge down to auto-shutoff, then charge to 100% on standard current. The fuel gauge IC on the PadFone S calibrates its coulomb counter against the new cell's discharge curve during that first cycle — skipping it leaves the percentage readout inaccurate for weeks.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on the PadFone S after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eA new Li-Polymer cell has a slightly different internal resistance profile than the aged cell it replaces. The PadFone S modem radio and display draw brief high-current spikes that can pull cell voltage below the BMS cutoff threshold — even when the fuel gauge still reads 25%. This is a voltage cliff event, not a capacity fault. It resolves after 2–3 full discharge-charge cycles as the fuel gauge IC maps the new cell's actual voltage-versus-capacity curve and adjusts the shutdown trigger point accordingly.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePhone warm near the battery during the first few charges after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA fresh high-capacity Li-Polymer cell starts with higher impedance than a broken-in one. The charge IC on the PadFone S pushes constant current into that higher-impedance cell, and the resistance converts some of that energy to heat. This is expected behaviour for the first three to five cycles — not a fault with the cell or the charge circuit. If the back panel stays noticeably warm beyond five full cycles, check that the replacement cell's thickness matches the 4.50 mm spec, as an oversized cell pressed against the chassis traps heat against the charge IC.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43392089751642,"sku":"BWCS-APS001SL-1","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43392089784410,"sku":"BWCS-APS001SL-2","price":46.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43392089817178,"sku":"BWCS-APS001SL-3","price":49.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-APS001SL-1.webp?v=1779143684"},{"product_id":"asus-zenfone-max-replacement-battery-38v-5000mah-li-polymer","title":"Asus Zenfone Max C11P1508 Replacement Battery 3.8V 5000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAsus Zenfone Max ZC550KL — 3.8V Li-Polymer Replacement Battery (C11P1508)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.8V, 5000mAh Li-Polymer cell for the Asus Zenfone Max, covering ZC550KL, Z010D, and Z010AD variants. It replaces OEM part C11P1508 directly on the logic board connector. Capacity figures come from the product data, not third-party sources.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eZC550KL \/ Z010D \/ Z010AD platform fit:\u003c\/strong\u003e\n    These variants share the same 3.8V battery rail, physical footprint, and flex connector pinout. The BMS handshake on each model reads cell voltage and temperature from the same two-wire interface, so the replacement cell communicates 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 a full charge-discharge cycle on a ZC550KL unit. The BMS accepted the cell on first connection, charge current ramped normally through CC to CV phase, and no fault codes were logged in the battery stats partition.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first install:\u003c\/strong\u003e\n    On first use after installation, disable fast charging for one complete discharge-charge cycle. This lets the fuel gauge IC build an accurate discharge curve for the new cell before high-current charging pushes current into an uncalibrated state register.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Zenfone Max reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Zenfone Max uses a coulomb-counter fuel gauge IC that stores learned discharge curve data from the original cell. When a new cell goes in, the IC still references the old curve, so percentage readings drift — often showing full charge or dropping suddenly. The fix is one full uninterrupted discharge down to automatic shutdown, followed by a full charge to 100% without interruption. After that single cycle, the IC resets its reference points against the actual cell behaviour.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on the replacement cell\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 cliff — the point where cell voltage collapses rapidly under modem or display load. The phone cuts power to protect the cell before the percentage display catches up. It is not a faulty cell; it is an uncalibrated gauge. Run two full discharge-to-shutdown and full-recharge cycles, and the IC learns where the real low-voltage threshold sits. After calibration, shutdown should not occur above approximately 3.4V per cell.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43392093585498,"sku":"BWCS-AUC550SL-1","price":34.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43392093618266,"sku":"BWCS-AUC550SL-2","price":40.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43392093651034,"sku":"BWCS-AUC550SL-3","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AUC550SL-1.webp?v=1779143747"},{"product_id":"asus-zc520tl-replacement-battery-385v-4100mah-li-polymer","title":"Asus ZenFone 3 Max Compatible Battery C11P1611 3.85V 4100mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAsus ZenFone 3 Max 5.2 — 3.85V Li-Polymer Replacement Battery (C11P1611)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.85V, 4100mAh Li-Polymer cell replaces the original C11P1611 battery in the Asus ZenFone 3 Max 5.2 (ZC520TL), including Dual SIM and Global variants. It fits the same cavity, uses the same connector, and works with the phone's onboard charge IC without modification. Capacity matches OEM spec at 15.79Wh.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eZC520TL and ZenFone 3 Max 5.2 variants:\u003c\/strong\u003e\n    All listed models share the same battery bay dimensions, the same flex connector pinout, and the same BMS handshake requirements. One cell covers the full ZC520TL range without adapter or 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 ZC520TL unit and confirmed the BMS accepted charge on the first connection, the charge IC reached full termination voltage, and no thermal events occurred across three full charge cycles.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    After installation, disable fast charging and run one complete discharge down to automatic shutdown, then charge uninterrupted to 100%. This gives the coulomb counter a clean reference curve for the new cell before fast-charge current is applied.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the ZC520TL reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe ZenFone 3 Max 5.2 uses a coulomb-counting fuel gauge IC that builds its discharge model from the previous cell's chemistry data. When a new cell goes in, that stored model no longer matches the actual charge curve of the replacement. The phone reads voltage and maps it against the old curve, so percentages appear higher or lower than reality. One full uninterrupted discharge-to-shutdown followed by a full charge resets the reference data and brings the percentage display back into alignment.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% remaining on the ZC520TL\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis is a voltage-cliff failure, not a capacity failure. Under modem load or screen-on draw, the cell voltage drops faster than the fuel gauge predicts, crossing the BMS low-voltage cutoff before the reported percentage reaches zero. It happens most often when the fuel gauge IC is still calibrated to a degraded old cell curve. Run one full recalibration cycle as described above. If shutdowns continue past that point, check that the replacement cell connector is fully seated — a partial connection raises internal resistance and accelerates the voltage drop under load.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43392094470234,"sku":"BWCS-AUC523SL-1","price":34.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43392094503002,"sku":"BWCS-AUC523SL-2","price":38.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43392094535770,"sku":"BWCS-AUC523SL-3","price":42.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AUC523SL-1.webp?v=1779143747"},{"product_id":"asus-zenfone-3-laser-replacement-battery-385v-2900mah-li-polymer","title":"Asus ZenFone 3 Laser C11P1606 Replacement Battery 3.85V 2900mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAsus ZenFone 3 Laser ZC551KL — 3.85V Li-Polymer Replacement Battery (C11P1606)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.85V, 2900mAh Li-Polymer battery for the Asus ZenFone 3 Laser (ZC551KL). It replaces OEM part numbers C11P1606 and 0B200-02250000. If your ZenFone 3 Laser shuts down unexpectedly, drains fast, or won't hold a charge, this cell restores full function without replacing the handset.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eZenFone 3 Laser \/ ZC551KL fitment:\u003c\/strong\u003e\n    Both model names refer to the same device. The ZC551KL is the regional SKU designation. This battery matches the connector pinout, physical dimensions (71.80 × 62.35 × 3.74mm), and BMS communication protocol that the ZenFone 3 Laser's charge IC expects.\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 ZC551KL unit. The BMS accepted full charge termination correctly, and the protection circuit tripped at the expected low-voltage cutoff without false triggering under screen and modem load.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    On first use after installation, disable fast charging and run one complete discharge-charge cycle at standard rate. This lets the fuel gauge IC map its coulomb counter against the new cell's actual discharge curve before high-current charging begins on an uncalibrated cell.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on the ZenFone 3 Laser after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens because the fuel gauge IC still references the discharge curve of the old, degraded cell. When the new cell hits a voltage point the IC hasn't mapped yet, it misreads remaining capacity and triggers an emergency shutdown. The phone cuts power even though the cell has charge left. Running one full discharge to 0% — letting the phone shut off naturally — then charging uninterrupted to 100% teaches the coulomb counter the new curve. After that cycle, the shutdown-at-30% behaviour typically stops.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePhone not powering on after the battery sat in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-Polymer cells that drop below approximately 2.5V trigger a BMS lockout to prevent cell damage during recovery charging. A phone that won't respond to the power button after long storage is almost always in this state. Connect the device to a wall adapter — not a PC USB port — and leave it for 20–30 minutes before pressing power. The charge IC will trickle current into the cell until it clears the BMS threshold, at which point normal charging resumes. If the device still shows no response after 45 minutes on a wall adapter, check that the charge port flex cable is seated correctly.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43392095060058,"sku":"BWCS-AUC551SL-1","price":34.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43392095092826,"sku":"BWCS-AUC551SL-2","price":38.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43392095125594,"sku":"BWCS-AUC551SL-3","price":42.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AUC551SL-1.webp?v=1779143748"},{"product_id":"asus-zenfone-3-replacement-battery-385v-2900mah-li-polymer","title":"Asus ZenFone 3 C11P1511 Replacement Battery 3.85V 2900mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAsus ZenFone 3 \/ ZS570KL \/ ZE552KL — 3.85V Li-Polymer Replacement Battery (C11P1511)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.85V, 2900mAh Li-Polymer replacement cell for the Asus ZenFone 3 series smartphones. It fits the ZenFone 3, ZenFone 3 Deluxe Dual SIM Global, ZS570KL, and ZE552KL, among other variants in the same lineup. OEM part numbers C11P1511 and 0B200-02000500 both cross to this cell.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eZenFone 3 series fit:\u003c\/strong\u003e\n    These models share a common 3.85V cell format, connector pinout, and BMS handshake protocol. The ZS570KL and ZE552KL use the same physical envelope and charge IC communication — one 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 ZE552KL. The BMS accepted the cell without error flags, and the charge IC held steady at the correct termination voltage across multiple cycles.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first install:\u003c\/strong\u003e\n    On first use after installation, disable fast charging and run one complete discharge-charge cycle on standard charge. This lets the fuel gauge IC map the new cell's discharge curve before the coulomb counter locks in its reference points — skipping this step is the leading cause of erratic percentage readings post-swap.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on the ZenFone 3 after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge IC is still referencing the old cell's voltage-to-capacity curve. A fresh Li-Polymer cell hits a steeper voltage drop under modem or display load than the worn original — the phone interprets that as a hard cutoff even though capacity remains. The fix is one full, uninterrupted discharge to automatic shutdown followed by a full charge on standard (non-fast) mode. After that cycle, the coulomb counter recalibrates and the shutdowns stop.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eUSB fast charge not activating on the first cycle after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eOn the first charge after a cell swap, the ZenFone 3's charge IC defaults to a reduced current trickle while it verifies the new cell's internal impedance. This is normal — the IC won't negotiate fast charge until it confirms the cell is stable above 3.0V per cell. If fast charge still does not activate after the first full cycle, check that the charger is rated for the correct protocol and that the USB cable is not limiting current. Try a known-good cable rated to at least 3A.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43392095158362,"sku":"BWCS-AUC552SL-1","price":34.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43392095191130,"sku":"BWCS-AUC552SL-2","price":38.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43392095223898,"sku":"BWCS-AUC552SL-3","price":42.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AUC552SL-1.webp?v=1779143748"},{"product_id":"asus-zenfone-3-52-replacement-battery-385v-2500mah-li-polymer","title":"Asus ZenFone 3 5.2 C11P1601 Replacement Battery 3.85V 2500mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAsus ZenFone 3 5.2 \/ ZE520KL — 3.85V Li-Polymer Replacement Battery (C11P1601)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.85V, 2500mAh Li-Polymer cell that replaces the original C11P1601 battery in the Asus ZenFone 3 5.2 and ZE520KL. It fits ZE520KL variants including ZenFone 3 Dual SIM Global LTE. Capacity matches the factory spec at 9.63Wh.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eZE520KL and Dual SIM Global LTE fitment:\u003c\/strong\u003e\n    Both variants share the same battery bay dimensions, connector pinout, and BMS communication protocol — one cell fits all listed models 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 a full charge and load discharge on ZE520KL hardware. The BMS handshake completed correctly, charge current stepped down at 4.35V as expected, and the protection circuit tripped cleanly at the low-voltage cutoff.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle fuel gauge reset on the ZE520KL:\u003c\/strong\u003e\n    On first use after installation, disable fast charging and run one complete discharge-charge cycle at standard current. This lets the fuel gauge IC map the new cell's discharge curve before the charge IC begins pushing higher current into an uncalibrated cell.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on the ZE520KL after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens because the ZenFone 3's fuel gauge IC still holds the discharge curve of the old, degraded cell. The new cell hits a voltage cliff under modem or display load at a state-of-charge the IC has not yet mapped correctly. The phone reads 25% but the actual cell voltage has already dropped below the shutdown threshold. One full discharge-charge cycle at standard current rewrites the coulomb counter baseline and clears this behaviour.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eUSB fast charge not activating on the first cycle after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eAfter fitting a new cell, the charge IC on the ZE520KL may default to standard 5V\/1A input until it confirms the BMS is responding within expected parameters. On a fresh cell with no charge history, the proprietary fast-charge handshake can be skipped on the first cycle. Complete one full standard charge first — the IC logs the cell's internal resistance and re-enables the fast-charge protocol from the second cycle onward. Confirm fast charge is active by checking the notification shade for the fast-charging indicator at 5V\/2A or above.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43392095256666,"sku":"BWCS-AUC520SL-1","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43392095289434,"sku":"BWCS-AUC520SL-2","price":31.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43392095322202,"sku":"BWCS-AUC520SL-3","price":34.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AUC520SL-1.webp?v=1779143747"},{"product_id":"asus-live-dual-sim-replacement-battery-38v-2000mah-li-ion","title":"Asus C11P1506 Live Dual SIM Replacement Battery 3.8V 2000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAsus Live Dual SIM \/ ZenFone Go 5.5 — 3.8V Li-ion Replacement Battery (C11P1506)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.8V, 2000mAh Li-ion replacement battery for the Asus Live Dual SIM, G500TG, ZenFone Go 5.5, and ZenFone Go 5.5 Dual SIM smartphones. It uses OEM part number C11P1506 and slots into the same battery bay as the original cell. Capacity is 2000mAh (7.6Wh), matching the factory specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCross-model fit — Live Dual SIM, G500TG, ZenFone Go 5.5:\u003c\/strong\u003e\n    These devices share the same 3.8V power rail, identical connector pinout, and a common BMS handshake protocol, which is why a single C11P1506 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 cycled this cell through full charge and discharge on a Live Dual SIM unit. The BMS accepted the cell on first connection, balanced correctly across the protection circuit, and hit the expected 4.35V charge termination point without false cutoffs.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    On first use after installation, disable fast charging and run one complete discharge-charge cycle. The fuel gauge IC on these Asus devices calibrates its coulomb counter against the new cell's discharge curve — skipping this step causes the percentage readout to drift by up to 15% in the first week.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on the ZenFone Go and Live Dual SIM\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThis is the most reported failure mode with aged original cells on these devices. When the cell's internal resistance rises enough that it cannot sustain voltage under modem transmission or screen backlight load, the voltage drops below the BMS cutoff threshold even though the fuel gauge still shows charge remaining. The phone cuts out because the protection circuit sees a voltage cliff the coulomb counter did not predict. Replacing the cell eliminates the resistance problem — the BMS trips will stop once the new cell holds above 3.5V under load.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePhone reporting wrong battery percentage after cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe fuel gauge IC on the Live Dual SIM stores a learned discharge curve from the old cell. After a swap, it applies that old curve to the new cell and produces inaccurate percentage readings — often jumping 10–20% or dropping suddenly. This is not a cell defect. Run one full discharge to 0% shutdown, then charge uninterrupted to 100% to force the IC to write a fresh calibration curve. After that cycle, percentage tracking stabilises and readings stay within 3–5% of actual charge state.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43392104955994,"sku":"BWCS-AUG500SL-1","price":32.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43392104988762,"sku":"BWCS-AUG500SL-2","price":36.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43392105021530,"sku":"BWCS-AUG500SL-3","price":41.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AUG500SL-1.webp?v=1779143796"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/collections\/ASUS_LOGO.png?v=1787153866","url":"https:\/\/batteryweb.com\/collections\/asus-replacement-batteries.oembed","provider":"BatteryWeb","version":"1.0","type":"link"}