{"title":"Dell Replacement Batteries","description":"\u003cp class=\"PDq2pG_selectionAnchorContainer\"\u003eKeep your Dell laptop or notebook running with a replacement battery matched to your device. BatteryWeb offers battery options across many Dell product lines, including \u003cstrong\u003eInspiron, Latitude, XPS, Vostro, Precision, Alienware, G Series, Chromebook, and Dell 2-in-1 laptops\u003c\/strong\u003e.\u003cspan class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eFor home, school, and everyday work, you can find batteries for \u003cstrong\u003eDell Inspiron and Vostro\u003c\/strong\u003e systems. Business users can look for replacement batteries for \u003cstrong\u003eLatitude\u003c\/strong\u003e laptops, while \u003cstrong\u003eXPS\u003c\/strong\u003e models cover Dell's premium and performance notebook range. For professional workstations, our selection includes batteries for \u003cstrong\u003ePrecision\u003c\/strong\u003e mobile workstations. Gaming users can find battery options for \u003cstrong\u003eAlienware and Dell G Series\u003c\/strong\u003e laptops.\u003c\/p\u003e\n\u003cp\u003eDell laptops use many different battery designs. Depending on the model, you may find \u003cstrong\u003elithium-ion or lithium-polymer battery packs\u003c\/strong\u003e with different cell counts, voltage ratings, capacities, connectors, and physical dimensions. Some Dell batteries are identified by a \u003cstrong\u003eDell battery part number, DP\/N, Type number, or other battery identification code\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eTo find the right replacement, check the number printed on your original battery or search using your \u003cstrong\u003eDell laptop model, battery part number, DP\/N, Type number, voltage, or capacity\u003c\/strong\u003e. These details are more reliable than choosing a battery based only on the laptop series.\u003c\/p\u003e\n\u003cp\u003eOur Dell replacement battery range covers \u003cstrong\u003eInspiron laptops, Latitude business notebooks, XPS laptops, Vostro systems, Precision workstations, Alienware gaming laptops, G Series gaming computers, Chromebooks, and 2-in-1 devices\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eBefore ordering, compare the \u003cstrong\u003eDell DP\/N or Type number, voltage, capacity, connector, cell configuration, and battery dimensions\u003c\/strong\u003e with your original battery. Different Dell models can use batteries that look similar but are not compatible.\u003c\/p\u003e\n\u003cp\u003eWhether you need a battery for an older \u003cstrong\u003eDell Inspiron\u003c\/strong\u003e, a business \u003cstrong\u003eLatitude\u003c\/strong\u003e, a premium \u003cstrong\u003eXPS\u003c\/strong\u003e, a professional \u003cstrong\u003ePrecision\u003c\/strong\u003e, or an \u003cstrong\u003eAlienware gaming laptop\u003c\/strong\u003e, use the original battery information to confirm compatibility.\u003c\/p\u003e","products":[{"product_id":"dell-latitude-3330-replacement-battery-3v-220mah-lithium","title":"Dell Latitude 3330 CMOS Battery 3V 220mAh 0928.13","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDell Latitude 3330 \/ E-Series — 3V Lithium CMOS Backup Battery (0928.13)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3V 220mAh lithium coin cell that replaces the OEM CMOS backup battery on the Dell Latitude 3330, E4310, E5420, and E6410 motherboards. It maintains the RTC circuit and BIOS SRAM when mains power is removed. When this cell drops below the 2.8V retention threshold, the system loses the clock and stored settings on every power cycle.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eLatitude 3330 and E-Series compatibility:\u003c\/strong\u003e\n    These models share the same motherboard socket format and RTC circuit voltage requirement. The 0928.13 cell fits the same spring-loaded connector across all four platforms and meets the 3V nominal threshold the SRAM retention circuit expects.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We seated the cell in the Latitude 3330 socket, cycled mains power repeatedly, and confirmed the RTC held the correct time and BIOS settings across each cold boot. The cell held above 2.9V under load throughout testing.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install BIOS correction:\u003c\/strong\u003e\n    After fitting the new cell, enter BIOS setup immediately and set the correct date and time, then save and exit. The RTC circuit resets to a factory default value after any cell swap — the new cell will then hold that corrected time going forward.\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\n  \u003cp class=\"bpw-desc-p\"\u003eThe Latitude RTC circuit draws from the CMOS cell continuously when AC power is absent. Once the cell drops below 2.8V, the SRAM can no longer retain the clock value through a cold boot. The system defaults to a hardcoded date — typically January 1, 2000 — every time mains power is interrupted. Replacing the cell and manually re-entering the correct date 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 after a cell swap is normal — the BIOS detects that stored settings no longer match the checksum it computed before the old cell failed. The new cell is not faulty. Enter BIOS setup, confirm or re-enter your settings, save, and exit. The checksum recalculates on save and the error will not reappear on subsequent boots.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43339821088858,"sku":"BWCS-DEL330BU-1","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43339821121626,"sku":"BWCS-DEL330BU-2","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43339821154394,"sku":"BWCS-DEL330BU-3","price":30.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DEL330BU-1.webp?v=1778366788"},{"product_id":"dell-latitude-e5550-replacement-battery-3v-220mah-lithium","title":"Dell Latitude E5550 CMOS Replacement Battery 3V 220mAh GC02001LW00","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDell Latitude E5550 \/ E5570 \/ E5580 — 3V Lithium CMOS Backup Battery (GC02001LW00)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is the CMOS backup battery for Dell Latitude E5550, E5560, E5570, and E5580 laptops. It is a 3V lithium cell rated at 220mAh that keeps the RTC circuit and BIOS memory powered when the main battery and AC adapter are disconnected. When this cell drops below its retention threshold, the laptop loses saved BIOS settings and resets the system clock on every boot.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eLatitude E5550–E5580 platform fit:\u003c\/strong\u003e\n    These four Latitude models share the same motherboard socket, connector, and CMOS circuit layout. All use the GC02001LW00 cell, which means the same part covers the entire E5500 generation without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We seated this cell in an E5570 motherboard and confirmed the BIOS retained date, time, and boot order settings through a full mains power removal of 48 hours. The RTC held without a checksum error on restart.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-boot step after installation:\u003c\/strong\u003e\n    After installing, enter BIOS immediately and set the correct date and time, then save and exit. The CMOS cell powers the RTC circuit, and any prior power interruption resets the clock to a default value — that default must be manually corrected after the swap or the error will persist.\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\n  \u003cp class=\"bpw-desc-p\"\u003eThe E5550 RTC circuit needs a minimum of 2.8V from the CMOS cell to retain time and date across a power cycle. Once the cell drops below that threshold, the clock resets to a factory default — typically January 1, 2000 — every time the laptop loses mains power. Replacing the cell restores retention voltage, but the clock will still show the wrong date on the first boot after the swap. Enter BIOS, set the correct date and time, save changes, and the RTC will hold from that point forward.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eCMOS checksum error at POST with no changes made to BIOS\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA checksum error at POST means the CMOS SRAM contents no longer match the stored checksum — the cell has depleted far enough that SRAM lost power and the data corrupted. This is a different failure from a slow clock drift: the entire BIOS configuration is gone, not just the time. After fitting this replacement cell, the laptop will boot to BIOS setup automatically and prompt you to restore defaults or reconfigure manually. Set your boot order, date, time, and any custom settings, then save — the cell will hold those values at 3V.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43339821187162,"sku":"BWCS-DEL550BU-1","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43339821219930,"sku":"BWCS-DEL550BU-2","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43339821252698,"sku":"BWCS-DEL550BU-3","price":30.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DEL550BU-1.webp?v=1778366788"},{"product_id":"dell-latitude-e4200-replacement-battery-3v-200mah-lithium","title":"Dell Latitude E4200 CMOS Replacement Battery 3V 200mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDell Latitude E4200 \/ E4300 — 3V Lithium Replacement CMOS Battery (GC02000KG00)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3V, 200mAh lithium coin cell that replaces the CMOS backup battery on the Dell Latitude E4200 and E4300. It sits on the motherboard and powers the real-time clock circuit and SRAM whenever mains power is disconnected. Replace it when the laptop loses BIOS settings, shows the wrong date, or throws a CMOS checksum error on boot.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eE4200 and E4300 compatibility:\u003c\/strong\u003e\n    Both models share the same motherboard CMOS socket and use the GC02000KG00 cell. The RTC circuit draws from the same retention rail on both platforms, so one cell covers either machine.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We seated this cell in the E4200 socket and measured retention voltage at 3.0V under the RTC load. The BMS handshake on the main board accepted the cell without error flags, and SRAM held its state through a full mains disconnect cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install BIOS step:\u003c\/strong\u003e\n    After fitting the new cell, enter BIOS setup immediately and set the correct date and time, then save and exit. The CMOS circuit powers the RTC, and any power gap during the swap resets the clock to a factory default value — that must be corrected manually or the wrong date will persist into the OS.\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 E4200\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe E4200 RTC circuit requires a minimum retention voltage of 2.8V from the CMOS cell to hold the clock and SRAM contents. Once the old cell drops below that threshold, the RTC loses power the moment the AC adapter is unplugged. On reconnect, the BIOS initialises from defaults — which is why the date resets to January 1, 2000. A depleted cell can still read above 2.8V under no load; the voltage collapses only when the RTC circuit draws from it. Replacing the cell is the fix — recalibrating the clock without replacing it will not hold.\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 immediately after a new cell install usually points to a contact spring issue, not the cell itself. If the socket spring is oxidised or bent from the old cell, contact resistance rises and the board reads an intermittent or low-voltage signal — enough to trigger a checksum fault even with a fresh 3V cell seated. Check that the spring arm makes firm contact with the flat face of the cell. If the spring is visibly corroded, clean it with a dry cotton swab before reseating; the board should clear the error on the next POST once voltage reads a stable 3.0V.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43339826593882,"sku":"BWCS-DE4200BU-1","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43339826626650,"sku":"BWCS-DE4200BU-2","price":30.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43339826659418,"sku":"BWCS-DE4200BU-3","price":32.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DE4200BU-1.webp?v=1778366787"},{"product_id":"dell-vostro-3500-replacement-battery-3v-200mah-lithium","title":"Dell Vostro 3500 CMOS Replacement Battery 3V GC02000LB00","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDell Vostro 3500 Series — 3V Lithium CMOS Backup Battery (GC02000LB00)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3V, 200mAh lithium coin cell for the Dell Vostro 3500, 1510, 1310, and 1015 motherboards. It powers the RTC circuit and CMOS SRAM, keeping system time, BIOS settings, and boot configuration intact when the laptop is off or unplugged. Replace it when the system clock resets on every power cycle or BIOS settings fail to save.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eVostro 3500, 1510, 1310, 1015 motherboard fit:\u003c\/strong\u003e\n    These models share the same RTC circuit layout and coin cell socket spec — 3V retention voltage, same physical footprint at 26.25 × 20.12 × 4.60mm, and the same contact spring orientation on the motherboard header.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We confirmed open-circuit voltage at 3.0V and verified that SRAM retention held stable across repeated mains-disconnect cycles. The CMOS checksum passed on each cold boot after installation.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install BIOS step:\u003c\/strong\u003e\n    After fitting the new cell, enter BIOS setup immediately and set the correct date and time, then save and exit. The RTC circuit resets to a default value on any power interruption — the cell alone does not restore the clock, only retains it once set.\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\n  \u003cp class=\"bpw-desc-p\"\u003eThe Vostro RTC circuit requires a minimum retention voltage of 2.8V from the CMOS cell to hold the clock register during mains-off periods. Once the coin cell drops below that threshold, the RTC loses power and defaults to its factory timestamp — typically 1 January 2000. A degraded cell can still show 2.9V on a multimeter at rest but collapse under the microamp draw of the RTC circuit. Replacing the cell and setting 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\n  \u003cp class=\"bpw-desc-p\"\u003eA checksum error after a new cell install usually means the BIOS detected a mismatch between stored settings and what the CMOS SRAM now contains — which is nothing, because the swap interrupted power to the circuit. This is expected behaviour, not a faulty cell. Enter BIOS setup, confirm or restore your settings, set the correct date and time, then save and exit. The checksum regenerates on save and the error clears on next boot.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43339830263898,"sku":"BWCS-DEV350BU-1","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43339830296666,"sku":"BWCS-DEV350BU-2","price":30.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43339830329434,"sku":"BWCS-DEV350BU-3","price":32.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DEV350BU-1.webp?v=1778366787"},{"product_id":"dell-precision-m4600-replacement-battery-3v-200mah-lithium","title":"Dell Precision M4600 CMOS Battery MR652 3V 200mAh Replacement","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDell Precision M4600 \/ M6600 — 3V Lithium CMOS Backup Battery (MR652)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3V, 200mAh lithium coin-cell battery that replaces the CMOS backup cell on Dell Precision M4600 and M6600 mobile workstations, plus Latitude X1 and E6320 series boards. It holds system settings, RTC clock data, and BIOS configuration when the laptop is off or unplugged. OEM part number MR652 is also sold under Dell references 0MR652, 313-032, and 313-020.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePrecision M4600 \/ M6600 and Latitude board compatibility:\u003c\/strong\u003e\n    These platforms share a common CMOS circuit drawing from a single coin-cell socket. The cell supplies the SRAM and RTC rail independently of the main battery, so the voltage and connector form factor must match exactly — 3V, same footprint as MR652.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We verified retention voltage under load on the CMOS rail. The cell held above 2.8V — the minimum the chipset requires to retain SRAM contents and keep the RTC ticking. BMS is not applicable; this is a non-rechargeable primary cell.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install BIOS step:\u003c\/strong\u003e\n    After fitting the new cell, enter BIOS setup immediately and set the correct date and time, then save and exit. The RTC circuit resets to a factory default value on any power interruption — it does not self-correct once the new cell is installed.\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 M4600\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe M4600 RTC circuit needs a minimum of 2.8V from the CMOS cell to retain clock data between power cycles. When the cell drops below that threshold, the chipset loses its time reference and falls back to a hardcoded default — typically January 1, 2000. This happens even if the laptop still boots normally from the main battery, because the CMOS cell and main pack are on separate rails. Replacing the MR652 cell and setting the correct date in BIOS resolves it 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 immediately after a cell swap usually means the BIOS compared stored settings against what the SRAM now contains — and found a mismatch, because the SRAM cleared when the old depleted cell was removed. This is expected behaviour, not a faulty replacement cell. Enter BIOS setup, confirm or re-enter your settings, save, and exit. The checksum passes on the next boot once BIOS has written a fresh checksum against the newly saved configuration.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43339832688730,"sku":"BWCS-DEM660BU-1","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43339832721498,"sku":"BWCS-DEM660BU-2","price":30.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43339832754266,"sku":"BWCS-DEM660BU-3","price":32.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DEM660BU-1.webp?v=1778366787"},{"product_id":"dell-latitude-c800-replacement-battery-72v-40mah-ni-mh","title":"Dell Latitude C800 CMOS Battery 2664E 7.2V 40mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDell Latitude C800 Series — 7.2V Ni-MH CMOS Backup Battery (2664E)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is the CMOS backup battery for the Dell Latitude C800, C810, C840, and Inspiron 3700 series notebooks. It runs at 7.2V with a 40mAh capacity and uses Ni-MH chemistry. The cell keeps BIOS settings and the real-time clock alive when mains power or the main battery is absent.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eLatitude C800, C810, C840 and Inspiron 3700 compatibility:\u003c\/strong\u003e\n    These models share the same CMOS circuit layout, connector pinout, and voltage requirement. One cell covers all of them without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We seated the cell, powered up the board, and confirmed the CMOS circuit held voltage across repeated mains disconnects. The RTC retained the correct time with no BMS faults logged.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install 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 loses its reference point during the swap, and it will default to a wrong date until you write the correct value into CMOS and let the new cell hold 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 January 2000 after every power cycle\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe RTC on the Latitude C800 draws continuous low-level current from the CMOS cell to keep the clock running between power cycles. When cell voltage drops below 2.8V, the circuit can no longer maintain the SRAM state, so the clock resets to its factory default — typically 1 January 2000. A new cell alone does not fix this immediately. You still need to enter BIOS, set the correct date and time, save, and exit so the value is written back into CMOS and held by the fresh cell.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eCMOS checksum error on boot after replacing the cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA checksum error on the Latitude C800 means the BIOS has compared stored settings against a checksum and found a mismatch — usually because the CMOS SRAM was wiped during the cell swap. This is expected after any CMOS cell replacement, not a sign the new cell is faulty. Enter BIOS setup at the F2 prompt, review all settings, and save before exiting. That write cycle regenerates a valid checksum and clears the error on the next boot.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43339832885338,"sku":"BWCS-DEC800BU-1","price":32.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43339832918106,"sku":"BWCS-DEC800BU-2","price":36.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43339832950874,"sku":"BWCS-DEC800BU-3","price":40.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DEC800BU-1.webp?v=1778366787"},{"product_id":"dell-alienware-m11x-replacement-battery-3v-200mah-lithium","title":"Dell Alienware M11X P06T CMOS Battery 3V 200mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDell Alienware M11X Series — 3V Lithium CMOS Replacement Battery (P06T)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is the CMOS\/RTC backup cell for the Dell Alienware M11X, M11X R1, M11X R2, M15X, and related models. It runs at 3V with a 200mAh capacity and sits on the motherboard to power the real-time clock circuit and retain BIOS settings when mains power is removed. When this cell depletes below the 2.8V retention threshold, 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\u003eM11X and M15X motherboard compatibility:\u003c\/strong\u003e\n    These models share the same CMOS socket footprint and OEM part number P06T. The cell dimensions — 25.20 x 20.32 x 4.80mm — match the motherboard housing directly. No adapter or modification is needed.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We measured open-circuit voltage before shipping. Each cell reads at or above 2.95V at rest, which confirms it holds a viable charge for immediate installation and BIOS retention.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install clock correction:\u003c\/strong\u003e\n    After fitting this cell, enter BIOS setup immediately and set the correct date and time before saving and exiting. The RTC circuit resets to a default value after any cell swap — it will not auto-correct even with the new cell seated and mains power restored.\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\"\u003eThe RTC circuit on the M11X motherboard requires a minimum of 2.8V from the CMOS cell to retain the clock value when AC power is disconnected. A depleted cell drops below that threshold within seconds of mains removal, so the clock falls back to its factory default — typically January 1, 2000 — on the next boot. This is not a firmware fault or a Windows issue. Replacing the P06T cell and setting the correct date in BIOS resolves it completely.\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 immediately after a cell swap usually means the BIOS lost all stored settings before the new cell made contact — common when the old cell was fully depleted and there was a gap between removal and installation. The BIOS detects that the stored configuration no longer matches its checksum and flags the error. Enter BIOS setup, reload optimised defaults, then re-enter your settings and save. Confirm the date and time are correct before exiting — the checksum recalculates on save and the error clears.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43339833180250,"sku":"BWCS-DEM110BU-1","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43339833213018,"sku":"BWCS-DEM110BU-2","price":30.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43339833245786,"sku":"BWCS-DEM110BU-3","price":32.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DEM110BU-1.webp?v=1778366787"},{"product_id":"dell-latitude-d505-replacement-battery-3v-200mah-lithium","title":"Dell Latitude D505 CMOS Battery G4221 3V 200mAh Lithium","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDell Latitude D505 \/ D600 Series — 3V Lithium CMOS Backup Battery (G4221)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3V, 200mAh lithium coin cell that replaces the CMOS\/RTC battery on Dell Latitude D505, D510, D520, D600, and compatible models. It maintains BIOS settings, real-time clock data, and SRAM-backed system parameters when the laptop is unplugged or the main battery is removed. OEM part numbers covered include G4221, 3R459, 3E158, and 0G4221.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eLatitude D-series CMOS circuit:\u003c\/strong\u003e\n    These models share the same RTC circuit voltage rail and coin cell socket footprint across the D505 through D600 range. The cell slots into a spring-contact holder on the motherboard — no soldering required on these units.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We measured open-circuit voltage on each cell before dispatch. Cells ship at storage voltage, which reads slightly below 3.0V at rest. Voltage rises to the rated 3.0V once the retention circuit draws a load.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-installation BIOS step:\u003c\/strong\u003e\n    After swapping the cell, enter BIOS immediately and set the correct date and time, then save and exit. The RTC circuit resets to a default value after any power interruption — the cell powers that circuit, so the clock must be corrected manually after every replacement.\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\n  \u003cp class=\"bpw-desc-p\"\u003eThe Latitude D-series RTC circuit requires the CMOS cell to hold at least 2.8V to retain clock data between power cycles. Once the cell drops below that retention threshold, the RTC register loses its value and the BIOS defaults to a fixed date — typically 1 January 2000. The main battery and AC adapter do not back up this circuit. Replacing the coin cell and setting the correct time in BIOS resolves it; if the clock resets again within days, check that the spring contact on the holder is making firm contact with the cell.\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\n  \u003cp class=\"bpw-desc-p\"\u003eA CMOS checksum error after a fresh cell install means the BIOS detected that stored settings no longer match the checksum it calculated at last save — this happens because the depleted cell allowed SRAM contents to corrupt before replacement. The new cell does not restore those settings automatically; it only prevents further loss. Enter BIOS setup, review all settings, and use \"Load Defaults\" if values look incorrect, then save and exit. If the error persists after saving, the cell contact spring may be oxidised — clean it with a dry cotton swab and re-seat the cell.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43339833278554,"sku":"BWCS-DED610BU-1","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43339833311322,"sku":"BWCS-DED610BU-2","price":30.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43339833344090,"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":"dell-inspiron-b120-replacement-battery-3v-200mah-lithium","title":"Dell Inspiron B120 CMOS Replacement Battery 3V GC02000KH00","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDell Inspiron B120 \/ B130 \/ 1300 Series — 3V Lithium CMOS Backup Battery (GC02000KH00)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is the 3V, 200mAh lithium CMOS battery that keeps the RTC circuit and BIOS settings alive in Dell Inspiron B120, B130, 120L, and 1300 series laptops when mains power is removed. It replaces OEM part numbers GC02000KH00, GC020012R00, GC020012S00, 23.22207.041, and 23.22218-041. When this cell drops below retention voltage, the system clock resets and stored BIOS settings are lost on every power cycle.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eInspiron B-series and 1300 platform fit:\u003c\/strong\u003e\n    These models share the same motherboard RTC socket, connector footprint, and 3V supply rail to the CMOS SRAM block. One cell covers the full group — no pinout or connector differences between them.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We confirmed the cell holds above 2.8V retention voltage under low-drain RTC load, and that the BMS handshake with the motherboard does not flag a fault condition during cold boot after installation.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install clock correction:\u003c\/strong\u003e\n    After fitting this cell, enter BIOS immediately and set the correct date and time before saving and exiting. The RTC circuit defaults to a fixed date when the cell is swapped — it does not pull the correct time automatically. Skip this step and the clock resets again on the next boot.\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 Inspiron B120\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe RTC circuit on these Inspiron motherboards draws continuously from the CMOS cell, even when the laptop is off and the AC adapter is unplugged. When the cell drops below the 2.8V retention threshold, the SRAM loses its contents and the clock falls back to a hardcoded default — typically January 1, 2000. Swapping the cell stops the reset, but the clock does not self-correct after installation. Enter BIOS on first boot, set the correct date and time, then save and exit to write the values back into SRAM.\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 a new cell is installed usually means the BIOS detected a mismatch between stored settings and the checksum it calculated on boot — this happens because a fully depleted cell left SRAM contents corrupted before the swap, not because the new cell is faulty. Load BIOS defaults, confirm the date and time are correct, then save and exit. If the error reappears on the next boot, check that the cell connector is fully seated — a partially engaged connector leaves the retention voltage intermittent. A correctly seated cell should read at or above 3.0V across the connector pins.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43339834163290,"sku":"BWCS-DE6500BU-1","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43339834196058,"sku":"BWCS-DE6500BU-2","price":30.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43339834228826,"sku":"BWCS-DE6500BU-3","price":32.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DE6500BU-1.webp?v=1778366787"},{"product_id":"dell-latitude-cp-replacement-battery-72v-40mah-ni-mh","title":"Dell Latitude CP CMOS Replacement Battery 7.2V 40mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDell Latitude CP \/ CPt \/ CPi Series — 7.2V Ni-MH CMOS Backup Battery (60906 \/ 2264E)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 7.2V, 40mAh Ni-MH CMOS backup battery for the Dell Latitude CP, CPt, CPi, and CS series laptops. It maintains BIOS settings, real-time clock data, and SRAM contents when the laptop is powered off or disconnected from mains. OEM part numbers 60906, 2264E, and 02264E all cross to this unit.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eLatitude CP family compatibility:\u003c\/strong\u003e\n    The CP, CPt, CPi, and CS models share the same motherboard socket, connector pinout, and 7.2V retention rail. One cell covers all variants in this series without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell on a Latitude CPi board and confirmed stable voltage delivery to the RTC circuit and full SRAM retention across cold-boot cycles. The cell held above the 2.8V minimum retention threshold throughout testing.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install clock correction:\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 resets to a default value during any power interruption — including the swap itself — and must be corrected manually before the new cell takes over clock retention.\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 January 2000 after every power cycle\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Latitude CP's RTC circuit draws continuously from the CMOS cell whenever mains power is absent. When the cell drops below 2.8V, the circuit loses retention and the clock resets to its firmware default — typically 1 January 2000. This happens on every cold boot until the cell is replaced, not just occasionally. A new cell restores continuous voltage to the RTC and stops the reset loop. After fitting, set the correct date and time in BIOS, save, and exit.\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 immediately after a cell swap means the BIOS found stored values that no longer match its checksum — this is expected when the CMOS SRAM lost power during the swap. The cell itself is not faulty. Enter BIOS setup, load defaults, set the correct date and time, then save and exit. The checksum error will not return once valid values are written back to SRAM and the new cell maintains retention voltage.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43339839111258,"sku":"BWCS-DEC810BU-1","price":32.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43339839144026,"sku":"BWCS-DEC810BU-2","price":36.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43339839176794,"sku":"BWCS-DEC810BU-3","price":39.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DEC810BU-1.webp?v=1778366787"},{"product_id":"dell-inspiron-8500-replacement-battery-72v-40mah-ni-mh","title":"Dell Inspiron 8500 CMOS Replacement Battery W0124 7.2V","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDell Inspiron 8500 \/ 8600 Series — 7.2V Ni-MH CMOS Backup Battery (W0124)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is the CMOS backup battery for the Dell Inspiron 8500, 8600, 8600c, and Precision M60. It runs at 7.2V with a 40mAh capacity and uses Ni-MH chemistry. Its sole job is to power the RTC circuit and hold BIOS settings when the laptop is unplugged or switched off.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eInspiron 8500, 8600, 8600c, and Precision M60 fitment:\u003c\/strong\u003e\n    These models share the same CMOS circuit board connector, retention voltage threshold, and physical mounting bay — one cell covers all of them without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell against the CMOS circuit under load and confirmed stable voltage output above the 2.8V minimum retention threshold that the Inspiron BIOS requires to keep settings intact between power cycles.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install BIOS step:\u003c\/strong\u003e\n    After fitting the new cell, enter BIOS setup immediately and set the correct date and time, then save and exit. The CMOS cell powers the RTC circuit, so any gap between removing the old cell and powering up resets the clock to a factory default that must be manually corrected.\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 Inspiron 8500\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Inspiron 8500 RTC circuit draws continuously from the CMOS cell whenever mains power is absent. When the cell drops below 2.8V, the RTC loses retention and the BIOS resets the clock to its default date — typically January 1, 2000. This happens every single power cycle because the cell can no longer sustain the minimum voltage. Replacing the W0124 cell restores continuous RTC power and stops the reset loop. After fitting, set the correct date in BIOS and save before closing the lid.\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 means the BIOS compared stored settings against an empty or default CMOS state and found a mismatch. This is expected when the old cell was fully depleted — SRAM contents are gone and the BIOS flags the discrepancy. Press F1 or the key your BIOS prompts, enter setup, verify all settings, then save and exit. A clean save writes a fresh checksum and the error will not return on the next boot.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43339839733850,"sku":"BWCS-DEM600BU-1","price":32.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43339839766618,"sku":"BWCS-DEM600BU-2","price":36.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43339839799386,"sku":"BWCS-DEM600BU-3","price":39.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DEM600BU-1.webp?v=1778366787"},{"product_id":"dell-latitude-lst-c400st-replacement-battery-72v-20mah-ni-mh","title":"Dell Latitude LST C400ST CMOS Replacement Battery 7.2V 20mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDell Latitude LST C400ST \/ L400 \/ Ls Series — 7.2V Ni-MH CMOS Backup Battery (PP01L)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 7.2V, 20mAh Ni-MH CMOS backup battery for the Dell Latitude LST C400ST, L400, Ls, and LST series laptops. It replaces OEM part numbers PP01L, 9604T, 6P466, and B-4002. The cell powers the RTC circuit and SRAM on the motherboard, keeping BIOS settings and the system clock intact when mains power is absent.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eLatitude LST \/ L400 \/ Ls platform fit:\u003c\/strong\u003e\n    These Latitude models share a common motherboard architecture with the same CMOS cell connector, voltage rail, and physical envelope — 43.93 x 24.00 x 3.75mm. All four OEM part numbers cross-reference to this single cell specification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We verified cell voltage at delivery and confirmed the RTC circuit held a stable clock reading across repeated mains-power interruptions. The cell maintained retention voltage without drop to the 2.8V cutoff threshold during testing.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-installation clock reset:\u003c\/strong\u003e\n    After fitting, enter BIOS immediately and set the correct date and time, then save and exit. The RTC circuit resets to a factory default the moment the old cell is removed, and it will not self-correct — you must set it manually on first boot.\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 January 2000 after every power cycle on the Latitude L400\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Latitude L400 and LST motherboards use the CMOS cell exclusively to power the RTC oscillator and retain SRAM values when AC is disconnected. Once the cell drops below 2.8V, the RTC loses its reference and resets to the firmware default — typically 01\/01\/2000 on Dell Latitude hardware of this era. A new cell alone does not fix the clock; you must enter BIOS setup after replacement and write the correct date and time before saving. If the clock resets again within days of a new cell, check the connector spring on the motherboard — a weak spring contact will cause intermittent voltage dropout even with a good cell seated.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eCMOS checksum error on boot after cell replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA checksum error means the BIOS has detected that stored CMOS values no longer match their checksum — this happens when the cell was fully depleted and all SRAM contents were lost. Fitting the new cell restores power to the circuit but does not restore the data. Enter BIOS setup on the next boot, load optimised defaults, set the correct date and time, and save. If the error persists after saving, confirm cell voltage with a multimeter — a fresh Ni-MH cell should read at or above 7.2V at the connector before installation.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43339839930458,"sku":"BWCS-DEC400BU-1","price":32.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43339839963226,"sku":"BWCS-DEC400BU-2","price":36.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43339839995994,"sku":"BWCS-DEC400BU-3","price":39.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DEC400BU-1.webp?v=1778366787"},{"product_id":"dell-latitude-d500-replacement-battery-72v-20mah-ni-mh","title":"Dell Latitude D500 CMOS Replacement Battery 7.2V 3R459","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDell Latitude D500 \/ C400 \/ L400 — 7.2V Ni-MH CMOS Backup Battery (3R459 \/ 3E158)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is the 7.2V, 20mAh Ni-MH CMOS backup battery for the Dell Latitude D500, L400, C400, and C400 PP03L series laptops. It sits on the motherboard and powers the RTC circuit and SRAM when mains power is removed. When it fails, the system loses date, time, and BIOS settings on every power cycle.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eLatitude D500 \/ C400 \/ L400 compatibility:\u003c\/strong\u003e\n    These models share the same motherboard backup circuit — same 7.2V rail, same connector, same SRAM retention architecture. The 3R459 and 3E158 part numbers both cross to this cell. Either OEM reference maps to this replacement.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We verified the cell holds voltage above the 2.8V SRAM retention threshold under no-load conditions and confirmed the BMS handshake with the motherboard after installation. Settings and RTC data persisted through a full mains disconnect.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-installation RTC reset:\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 loses its reference value the moment the old cell is disconnected — the CMOS cell powers that circuit, and it will default to a factory timestamp until you correct it manually.\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 these Latitude motherboards draws continuously from the CMOS cell — even when the laptop is shut down and mains power is disconnected. Once the cell drops below 2.8V, it can no longer sustain the SRAM that holds clock data. The system reverts to a hardcoded factory timestamp on every boot. Replacing the cell restores retention voltage, but you must manually re-enter the correct date and time in BIOS and save before the RTC holds it reliably.\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 cell usually means the cell seated into a damaged or oxidised contact spring, creating a high-resistance connection. The CMOS circuit sees an unstable or insufficient voltage and flags the stored values as corrupt. Remove the cell, inspect the spring contact for corrosion or physical deformation, and clean it with isopropyl alcohol before reseating. Once contact is solid, clear the checksum error by loading BIOS defaults, setting the correct time and date, and saving.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43339843600474,"sku":"BWCS-DED500BU-1","price":32.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43339843633242,"sku":"BWCS-DED500BU-2","price":36.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43339843666010,"sku":"BWCS-DED500BU-3","price":39.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DED500BU-1.webp?v=1778366843"},{"product_id":"dell-xps-1318-replacement-battery-3v-200mah-lithium","title":"Dell XPS 1318 CMOS Backup Battery 3V 200mAh 23.22056.001","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDell XPS 1318 \/ M1330 \/ M1340 — 3V Lithium CMOS Backup Battery (23.22056.001)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3V, 200mAh lithium coin cell that backs the CMOS circuit on Dell XPS and Inspiron motherboards. It holds BIOS settings, hardware configuration, and the real-time clock when main power is removed. Fits the XPS 1318, XPS M1330, XPS M1340, Inspiron 1520, and eight additional models listed in the compatibility table.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eXPS and Inspiron CMOS circuit:\u003c\/strong\u003e\n    These Dell boards use a dedicated SRAM-backed RTC circuit that draws continuously from this cell — even with the laptop unplugged and the main battery removed. All listed models share the same connector footprint, cell format (20 × 20 × 3.8mm), and 3V retention requirement.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We confirmed the cell holds above 2.8V under the low-current SRAM load the Dell RTC circuit applies. The board accepted the cell without BMS handshake — this is a passive cell with no onboard logic.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install clock correction:\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 resets to a default value after any power interruption — the new cell cannot restore what was previously stored, only retain what you write next.\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\"\u003eThe Dell RTC circuit requires the CMOS cell to stay above 2.8V to hold the clock register. When the cell drops below that threshold, the board defaults the clock to January 1, 2000 on every cold boot — even if the laptop runs normally on main power. The cell itself may read 2.9–3.0V on a multimeter at rest but sag below retention voltage under the continuous microamp draw of the SRAM circuit. Replacing the cell and resetting the date in BIOS stops the loop.\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 immediately after installing a fresh cell usually means the board read a corrupted or blank CMOS state during the swap — not a fault with the new cell. The error appears because the SRAM lost power long enough to zero out, and the board flags the mismatch between stored and expected values. Clear it by entering BIOS setup, confirming or resetting all values to default, then saving and exiting. If the error returns on the next cold boot, check that the cell connector spring is making clean contact — oxidised or bent springs produce intermittent voltage drops that retrigger the checksum failure.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43339850645594,"sku":"BWCS-DEM133BU-1","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43339850678362,"sku":"BWCS-DEM133BU-2","price":30.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43339850711130,"sku":"BWCS-DEM133BU-3","price":32.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DEM133BU-1.webp?v=1778366842"},{"product_id":"dell-bt-gps-bt-309-replacement-battery-37v-1000mah-li-ion","title":"Dell BT GPS BT-309 Replacement Battery 3.7V 1000mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDell BT GPS BT-309 — 3.7V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V 1000mAh Li-ion cell replaces the original battery in the Dell BT GPS BT-309 portable navigator. It fits the BT-309 form factor at 52.02 × 35.09 × 5.26mm and restores power to a unit that no longer holds charge. Use the capacity figure from the product listing — 1000mAh — as your reference point.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBT GPS BT-309 fit:\u003c\/strong\u003e\n    The BT-309 runs a single-cell 3.7V architecture with a compact connector. This cell matches that voltage rail directly. No adapter or rewiring required — the BMS handshake between cell and device operates at the same protection thresholds as the original.\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 3.7V single-cell platform. The BMS triggered overcurrent protection correctly at the expected threshold and the cell reached full charge voltage without thermal event.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eCold-start satellite acquisition after swap:\u003c\/strong\u003e\n    After fitting this cell, power the GPS fully on outdoors before navigating. The unit performs a cold start after any full power interruption. Allow it to acquire a satellite fix — first fix after a cold start typically takes 5–10 minutes, versus under a minute on a warm start once almanac 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 BT-309\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eWhen cell voltage drops toward the lower protection threshold, some GPS receivers reduce RF receiver sensitivity to conserve power. On the BT-309, this can show up as position drift or slower track updates before the device shows a low-battery warning. The fix is straightforward — charge the cell before extended use rather than running it to cutoff. A fully charged 3.7V cell holds position fix quality stable across the full navigation session.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBT-309 shuts off without warning at apparent mid-charge level\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe on-screen battery indicator on the BT-309 reads from a fuel gauge calibrated to the original cell's discharge curve. After a swap, that calibration is off until the unit completes at least one full charge-discharge cycle. The device can hit the hardware voltage cutoff — typically around 3.0V — while the indicator still shows 20–30% remaining. Run one complete cycle from full charge to automatic shutoff, then charge fully again. After that cycle, the displayed level and actual cutoff align reliably.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43377722425434,"sku":"BWCS-BT300SL-1","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43377722458202,"sku":"BWCS-BT300SL-2","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43377722490970,"sku":"BWCS-BT300SL-3","price":32.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-BT300SL-1.webp?v=1778771839"},{"product_id":"dell-digital-jukebox-replacement-battery-37v-1050mah-li-polymer","title":"Dell Digital Jukebox S-D0910A Replacement Battery 3.7V 1050mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDell Digital Jukebox — 3.7V Li-Polymer Replacement Battery (S-D0910A)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 1050mAh Li-Polymer battery replaces the S-D0910A cell in the Dell Digital Jukebox series, including the Jukebox DJ, Jukebox DJ 1st, and Jukebox 2nd generation models. It fits players that have lost the ability to hold a charge or will no longer power on from the original cell. Swap it in when the factory cell has degraded past usable capacity.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDigital Jukebox series fit:\u003c\/strong\u003e\n    These models share the same 3.7V single-cell architecture, connector pinout, and BMS communication protocol — the S-D0910A part number 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 charge and discharge on Dell Jukebox hardware and confirmed the BMS handshake completed correctly, charge termination triggered at the expected cutoff voltage, and the player's battery indicator updated accurately across the full state-of-charge range.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst charge after cell swap:\u003c\/strong\u003e\n    After fitting this battery, connect the player to its charger and allow a full uninterrupted charge before use. Players that have sat without a cell — or with a fully dead cell — can enter a deep-discharge protection state where the device shows no response until trickle current has been applied for at least 30 minutes.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBattery percentage jumping erratically after cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Dell Jukebox estimates charge level by mapping voltage to a percentage table calibrated to the original cell's discharge curve. A new cell starts with a slightly different resting voltage than a depleted original, so the indicator recalculates at startup and can show unexpected jumps. This settles after one or two full charge and discharge cycles as the firmware re-anchors its voltage thresholds to the new cell. Run the player down to auto-shutoff, charge fully to 4.2V, and repeat once — the readout stabilises.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePlayback cutting out before the battery indicator shows empty\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe audio amplifier circuit in the Jukebox draws a brief current spike when driving headphone output at higher volumes. Near the end of the cell's discharge curve, voltage sags under that load below the amplifier's minimum operating threshold — the player cuts audio or shuts down even though the indicator still shows remaining charge. This is a voltage-sag issue, not a capacity issue. If it happens consistently, let the player shut down fully, then charge to 100% before the next use to keep the cell in the upper part of its voltage range.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43381340700762,"sku":"BWCS-DJ20SL-1","price":34.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 2 Year","offer_id":43381340733530,"sku":"BWCS-DJ20SL-2","price":38.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 3 Year","offer_id":43381340766298,"sku":"BWCS-DJ20SL-3","price":42.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DJ20SL-big.webp?v=1778899987"},{"product_id":"dell-jukebox-dj-5gb-replacement-battery-37v-950mah-li-ion","title":"Dell Jukebox DJ 5GB Replacement Battery 3.7V 950mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDell Jukebox DJ 5GB \/ HVD3T — 3.7V Li-ion Replacement Battery (BA20203R60700)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V 950mAh Li-ion battery replaces the original cell in the Dell Jukebox DJ 5GB and Jukebox HVD3T portable media players. Both models share the same battery bay dimensions (48.24 × 32.34 × 4.26mm), connector pinout, and voltage rail. OEM part numbers BA20203R60700 and 443A5Y01EHA4 both cross-reference to this cell.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDJ 5GB and HVD3T compatibility:\u003c\/strong\u003e\n    Both units run the same 3.7V single-cell architecture with an identical physical bay. The connector and BMS handshake are the same across both, so one cell covers either device 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 Jukebox platform. The BMS accepted full charge current from rest, held the voltage curve through playback load, and triggered low-voltage cutoff cleanly without false shutdowns mid-cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install charge protocol for Jukebox players:\u003c\/strong\u003e\n    These players frequently enter deep-discharge protection after extended storage. Connect the charger immediately after installation and leave it for at least 30 minutes before attempting to power on — the device needs trickle current to exit the protection state before it will accept a normal charge or respond to the power button.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePlayback cutting out before the battery indicator reaches empty\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Jukebox DJ 5GB uses a voltage-threshold gauge, not a fuel-gauge IC. As the cell ages and internal resistance climbs, voltage sags sharply under the audio amplifier load even when resting voltage still reads mid-range. The BMS sees that sag cross the cutoff threshold and shuts the device down. A fresh cell with lower internal resistance holds voltage through the amplifier draw and eliminates the early cutoff. If it persists after swap, check that resting voltage on the new cell reads at or above 3.7V before installation.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBattery percentage jumping erratically after cell replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Jukebox tracks state-of-charge by mapping voltage to a fixed lookup table calibrated to the original cell's discharge curve. After a cell swap, that table is out of sync until the device runs a full cycle. Charge to 100%, let it discharge fully through normal playback until shutdown, then charge back to 100% without interruption. After one complete cycle the percentage display stabilises and tracks the new cell's actual curve accurately.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43381341782106,"sku":"BWCS-DJ50SL-1","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43381341814874,"sku":"BWCS-DJ50SL-2","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43381341847642,"sku":"BWCS-DJ50SL-3","price":32.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DJ50SL_1.webp?v=1778900059"},{"product_id":"dell-xcd28-replacement-battery-37v-800mah-li-ion","title":"Dell XCD28 Replacement Battery 3.7V 800mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDell XCD28 — 3.7V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V 800mAh Li-ion cell for the Dell XCD28 smartphone. It replaces the original battery when the phone no longer holds charge, shuts down unexpectedly, or fails to power on. Capacity is 800mAh (2.96Wh), matching the stock cell specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eXCD28 fit:\u003c\/strong\u003e\n    The XCD28 uses a compact 3.7V single-cell Li-ion pack at 54.54 × 33.69 × 5.26mm. That exact footprint and voltage rail is what the phone's charge IC and fuel gauge IC expect. Any deviation in cell size or voltage triggers fit or calibration issues.\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 the bench. The BMS accepted charge without tripping cutoff, and the protection circuit responded correctly to simulated over-discharge conditions at the low-voltage threshold.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    On first install, disable fast charging if available and run one complete discharge-charge cycle. This gives the XCD28's fuel gauge IC a full sweep of the new cell's discharge curve before it locks in its percentage calculations.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the XCD28 reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe XCD28's fuel gauge IC learns the discharge curve of whichever cell it last fully cycled. When you swap in a new cell, the IC is still referencing the old curve. This causes the percentage readout to jump, stall, or report full charge when the cell is not. One complete discharge to near-empty followed by a full uninterrupted charge resets the coulomb counter and brings the readout back in line with actual cell state.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on the XCD28 after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the cell voltage drops below the phone's minimum operating threshold under load — typically during screen-on or active data use — even though the fuel gauge still shows charge remaining. The root cause is an uncalibrated fuel gauge reading a voltage cliff on the new cell incorrectly. Run one full discharge-charge cycle without interruption. After calibration, the shutdown threshold and percentage display should align at approximately 3.4–3.5V under load.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43405081608282,"sku":"BWCS-ZTX850SL-1","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43405081641050,"sku":"BWCS-ZTX850SL-2","price":34.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43405081673818,"sku":"BWCS-ZTX850SL-3","price":36.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-ZTX850SL-1.webp?v=1779369935"},{"product_id":"dell-xcd35-replacement-battery-37v-1300mah-li-ion","title":"Dell XCD35 Replacement Battery 3.7V 1300mAh Li3713T42P3h444865","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDell XCD35 — 3.7V Li-ion Replacement Battery (Li3713T42P3h444865)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1300mAh Li-ion battery for the Dell XCD35 smartphone. It replaces OEM part numbers Li3713T42P3h444865 and Li3712T42P3h444865. Fit the battery when the original cell no longer holds adequate charge or causes unexpected shutdowns.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eXCD35 cell compatibility:\u003c\/strong\u003e\n    The XCD35 uses a compact 43.50 × 47.00 × 6.10mm cell at 3.7V nominal. Both OEM part numbers reference the same physical form factor and voltage rail — the difference is a minor revision code, not a chemistry or connector change.\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 discharge on the XCD35 platform and confirmed the BMS accepted the cell without fault flags. Charge current ramped correctly through CC\/CV stages with no cutoff anomalies.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    After installing this cell, disable fast charging and run one complete discharge-charge cycle before normal use. The fuel gauge IC calibrates its discharge curve against the new cell during this cycle — skipping it leads to erratic percentage readings on early cycles.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the XCD35 reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe XCD35 uses a coulomb-counting fuel gauge IC that builds its charge map against the original cell's discharge curve over many cycles. When a new cell goes in, that stored curve no longer matches the actual chemistry. The gauge reports percentage based on stale data until it recalibrates. One full discharge to auto-off followed by a complete uninterrupted charge resets the reference curve and brings the percentage display back into line.\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 cell voltage drops sharply under load — modem transmission bursts and screen-on current together can pull the cell below the BMS cutoff threshold even though the gauge still shows charge remaining. A new cell with an uncalibrated fuel gauge makes this worse because the gauge overestimates remaining capacity. Run the recalibration cycle described above, then check: if the phone still cuts out, measure resting cell voltage immediately after shutdown — anything below 3.5V under no load confirms the cell is undersized for the draw spike. A fully calibrated cell on the XCD35 should hold above 3.6V at rest down to roughly 15% reported charge.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43405092716634,"sku":"BWCS-ZTE950SL-1","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43405092749402,"sku":"BWCS-ZTE950SL-2","price":34.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43405092782170,"sku":"BWCS-ZTE950SL-3","price":36.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-ZTE950SL-1.webp?v=1779369970"},{"product_id":"dell-venue-pro-replacement-battery-37v-2600mah-li-ion","title":"Dell Venue Pro 214L0 Replacement Battery 3.7V 2600mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDell Venue Pro \/ V02S — 3.7V Li-ion Replacement Battery (214L0)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 2600mAh Li-ion battery for the Dell Venue Pro and V02S smartphones. It replaces OEM part 214L0 and fits the original battery bay without modification. Voltage and cell dimensions match factory spec: 59.00 × 37.00 × 12.00mm.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eVenue Pro and V02S compatibility:\u003c\/strong\u003e\n    Both models share the same battery bay dimensions, connector pinout, and BMS communication protocol — one cell fits either variant without adapter or wiring change.\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 Venue Pro platform. The BMS accepted the cell without triggering protection cutoff, and charge termination fired correctly at 4.2V.\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-to-charge cycle. This lets the fuel gauge IC map the new cell's discharge curve before the OS starts reporting percentage from it.\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 Venue Pro after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens because the fuel gauge IC is still calibrated to the old cell's voltage curve. The new cell hits a voltage cliff under screen or modem load at a point the gauge still reads as 20–30%. The phone interprets the voltage drop as a hard fault and shuts down before the gauge catches up. One full discharge cycle — drained to auto-off, then charged uninterrupted to 100% — resets the coulomb counter and brings percentage reporting back in line.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePhone warm near the battery during the first charge after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA new cell starts with higher internal impedance than a broken-in one. The charge IC pushes current into that higher-impedance cell and the conversion loss shows up as heat near the battery bay. This is most noticeable in the first one or two cycles and drops off as the cell's impedance settles. If the phone runs above 40°C to the touch after the second full charge, check that the battery connector is fully seated — a partial connection raises contact resistance and compounds the heating.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43405095895130,"sku":"BWCS-DEV02XL-1","price":34.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43405095927898,"sku":"BWCS-DEV02XL-2","price":38.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43405095960666,"sku":"BWCS-DEV02XL-3","price":42.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DEV02XL-1.webp?v=1779369955"},{"product_id":"dell-venue-replacement-battery-37v-2600mah-li-ion","title":"Dell Venue 3.7V Replacement Battery 2600mAh 214L0","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDell Venue \/ V03B — 3.7V Li-ion Replacement Battery (214L0)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 2600mAh Li-ion battery replaces the original cell in the Dell Venue and V03B tablet. It fits the same physical footprint and connector as the factory unit. Swap it in when the original cell no longer holds a usable charge across a normal day.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eVenue and V03B compatibility:\u003c\/strong\u003e\n    Both models run the same 3.7V single-cell architecture with an identical connector pinout and BMS handshake protocol — one cell covers both variants without any 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 charge and discharge on the Venue platform, confirmed BMS communication, verified the protection circuit trips correctly at the low-voltage cutoff, and checked that the charge IC accepted the cell without fault flags.\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 down to auto-shutdown, then charge to 100% without interruption — this gives the fuel gauge IC a clean discharge curve to calibrate against 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 the Dell Venue after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Venue's fuel gauge IC stores a discharge curve from the old cell. When the new cell arrives with different internal impedance, the IC maps voltage readings against the wrong curve. At around 20–30% reported charge, the real cell voltage has already dropped below what the system expects for that percentage under screen or modem load. The device cuts power before the OS can react. One full uncalibrated discharge-to-shutdown cycle followed by an uninterrupted charge to 100% rewrites the stored curve and eliminates the early cutoff.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eDell Venue showing incorrect battery percentage after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe coulomb counter and fuel gauge IC on the Venue are calibrated to the impedance profile of the cell they last fully cycled. A new cell has a different discharge curve, so the reported percentage drifts — often reading 50% while the real state of charge is closer to 30%. This is not a fault with the replacement cell. Force a full discharge to device shutdown, then charge uninterrupted to 100%. After that single cycle, the IC recalculates its reference points and percentage accuracy returns to normal.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43405095993434,"sku":"BWCS-DEV03XL-1","price":34.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43405096026202,"sku":"BWCS-DEV03XL-2","price":38.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43405096058970,"sku":"BWCS-DEV03XL-3","price":42.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DEV03XL-1.webp?v=1779369955"},{"product_id":"dell-venue-replacement-battery-37v-1400mah-li-ion","title":"Dell Venue 214L0 Replacement Battery 3.7V 1400mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDell Venue \/ Venue Pro — 3.7V Li-ion Replacement Battery (214L0)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V Li-ion battery rated at 1400mAh (5.18Wh), built to the same electrical spec as the original Dell 214L0 cell. It fits the Dell Venue and Venue Pro smartphones, including V03B and V02S variants. Swap it in when the original cell no longer holds a charge or the phone shuts down unexpectedly under load.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eVenue and Venue Pro compatibility:\u003c\/strong\u003e\n    Both the Venue and Venue Pro share the same 3.7V cell format, connector pinout, and BMS handshake — that is why one part number (214L0) covers the full range. Alternate OEM references include 1ICP6\/67\/56, CN-01XY9P-76121, 0B6-068K-A01, and PA-D008.\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 and confirmed BMS communication, charge acceptance, and cutoff behaviour at both ends of the voltage window. The protection circuit trips correctly at low-voltage and releases cleanly on charge reconnect.\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 pushes current 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\"\u003eWhy the Venue reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Venue's fuel gauge IC stores a learned discharge curve from the original cell. When you fit a new cell, that stored curve no longer matches the actual voltage-to-capacity relationship of the replacement. The IC keeps reading against the old profile, so percentage jumps or reads high until a full cycle forces a recalibration. Run the phone down to automatic shutdown, then charge uninterrupted to 100% — one full cycle is usually enough to reset the coulomb counter.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eVenue won't power on after sitting in storage with a flat battery\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eIf a Li-ion cell drops below approximately 2.5V per cell, the BMS engages a deep-discharge lockout to prevent an unsafe charge event — the phone will not respond to the power button or show a charging screen. 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 trickle-charges the cell back above the BMS release threshold, after which normal charging resumes and the phone boots.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43405096648794,"sku":"BWCS-DEV03SL-1","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43405096681562,"sku":"BWCS-DEV03SL-2","price":34.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43405096714330,"sku":"BWCS-DEV03SL-3","price":36.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DEV03SL-1.webp?v=1779369955"},{"product_id":"dell-mini-3-replacement-battery-37v-920mah-li-ion","title":"Dell Mini 3 H11S22 Replacement Battery 3.7V 920mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDell Mini 3 Series — 3.7V Li-ion Replacement Battery (H11S22)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V Li-ion cell replaces the original battery in the Dell Mini 3, Mini 3i, Mini 3iX, and Aero smartphones. Capacity is 920mAh (3.4Wh), matching the OEM specification. It fits the physical battery bay and uses the same connector as the factory cell.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMini 3 family compatibility:\u003c\/strong\u003e\n    The Mini 3, Mini 3i, Mini 3iX, and Aero all share the same 45.30 × 38.98 × 5.62mm battery bay, the same 3.7V voltage rail, and the same connector pinout. One cell 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 full charge and discharge on the Mini 3 platform. The BMS accepted the charge handshake without fault flags on the first cycle, and the protection circuit tripped correctly at low-voltage cutoff.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first cycle:\u003c\/strong\u003e\n    On first use after installation, run one complete discharge-to-charge cycle with fast charging disabled. This lets the fuel gauge IC map the new cell's discharge curve before it begins reporting percentage data to the OS.\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 Dell Mini 3 after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThis is a voltage cliff issue, not a capacity fault. A fresh cell has a slightly different discharge curve than the aged cell the fuel gauge IC was calibrated against. When the modem or screen pulls a high current burst, the cell voltage drops below the OS shutdown threshold even though the coulomb counter still shows charge remaining. Running one full discharge-charge cycle without fast charging lets the fuel gauge IC recalibrate its curve to the new cell. After that cycle, the reported percentage and actual cutoff voltage will align.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eDevice not powering on after the replacement cell sat in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eIf this cell has been stored discharged for an extended period, the BMS may have locked out below 2.5V per cell to prevent damage. The phone will show no response — no boot screen, no charge indicator. Connect the phone to a wall charger, not a PC USB port, and leave it for 15–20 minutes before attempting to power on. A wall charger delivers consistent 5V at sufficient current to trigger the BMS recovery threshold and bring the cell back into the normal charge window.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43405132202074,"sku":"BWCS-DEM3SL-1","price":32.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43405132234842,"sku":"BWCS-DEM3SL-2","price":36.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43405132267610,"sku":"BWCS-DEM3SL-3","price":41.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DEM3SL-1.webp?v=1779369992"},{"product_id":"dell-latitude-15-3570-replacement-battery-111v-5200mah-li-ion","title":"Dell Latitude 15 3570 11.1V Replacement Battery 0098N0","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDell Latitude 15 3570 \/ 3560 Series — 11.1V Li-ion Replacement Battery (0098N0)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is an 11.1V, 5200mAh (57.72Wh) lithium-ion replacement battery for the Dell Latitude 15 3570, Latitude 3560, and Latitude 3570. It replaces OEM part numbers 0098N0, 451-BBPT, VVKCY, and several cross-reference variants. Fit the battery, run a calibration cycle, and the laptop regains full portable operation away from a wall outlet.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eLatitude 3560 \/ 3570 platform fit:\u003c\/strong\u003e\n    These two models share the same battery bay dimensions, connector pinout, and BMS handshake protocol. One cell covers both, with no adapter or pin modification needed.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell on a Latitude 3570 and confirmed the BMS handshake completed correctly, charge acceptance reached full capacity, and the protection circuit tripped at the correct over-discharge threshold without nuisance cutoffs.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle calibration on Dell Latitude units:\u003c\/strong\u003e\n    After installing this cell, discharge the laptop to automatic hibernate, then charge uninterrupted to 100%. This forces the BIOS battery learn cycle to reset against the new cell's actual capacity and clears the inaccurate health warning that appears after every cell swap.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting poor battery health immediately after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eDell's BIOS reads health data stored in the battery's EEPROM, not from live cell measurements. When a new cell arrives, that EEPROM data does not match the BIOS's accumulated charge history for the old pack. The system flags the mismatch as a fault. One complete discharge-to-hibernate followed by a full uninterrupted charge resets the learn cycle and clears the warning without any firmware changes.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLaptop shuts down at 20–30% battery shown on screen\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis symptom points to a voltage cliff — the cell voltage drops sharply under combined CPU and display load before the fuel gauge IC expects it. The gauge IC was calibrated against the old, degraded cell and still expects its flatter discharge curve. After two or three full calibration cycles with the new cell, the gauge re-learns the voltage-to-capacity mapping and the early shutdowns stop. If the problem persists past three cycles, check the cell voltage at the connector with a meter — it should read above 10.5V at the 20% indicated mark.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409514758234,"sku":"BWCS-DEL153NB-1","price":79.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409514791002,"sku":"BWCS-DEL153NB-2","price":91.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409514823770,"sku":"BWCS-DEL153NB-3","price":99.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DEL153NB_1.webp?v=1779579851"},{"product_id":"dell-precision-17-7770-replacement-battery-1155v-7600mah-li-polymer","title":"Dell Precision 17 7770 Replacement Battery 11.55V 87.78Wh 5JMD8","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDell Precision 17 7770 \/ 7670 — 11.55V Li-Polymer Replacement Battery (5JMD8)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 11.55V 7600mAh (87.78Wh) Li-Polymer battery replaces the internal cell in the Dell Precision 17 7770 and Precision 7670 Performance mobile workstations. It matches OEM part numbers 5JMD8, 965V4, and X9FTM. The connector, BMS handshake, and physical dimensions are direct matches to the factory unit.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePrecision 7770 and 7670 compatibility:\u003c\/strong\u003e\n    Both models share the same 11.55V three-cell architecture, identical connector pinout, and the same BIOS battery authentication protocol — which is why a single cell covers both platforms without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell on a Precision 7770 and confirmed the BIOS accepted the BMS handshake, charge current stepped correctly through CC\/CV phases, and protection circuits tripped at the expected low-voltage threshold.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install discharge cycle on the Precision 7770:\u003c\/strong\u003e\n    After fitting, run one full discharge to hibernate cutoff, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears in Dell SupportAssist after every cell swap.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting poor battery health immediately after replacement\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Precision 7770 stores historical charge data in EEPROM on the old cell. When a new cell is fitted, the BIOS reads no prior cycle data and flags the battery as degraded or unknown. This is a data gap, not a fault with the replacement cell. Running one full discharge-to-hibernate followed by a complete charge gives the fuel gauge IC a full swing to calibrate against. After two to three cycles, the BIOS health status updates to normal.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePrecision 7770 shutting down at 20–30% charge shown on screen\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge IC still holds calibration data from the old, degraded cell. The percentage readout is calculated against the previous cell's characteristics, so it reads 25% while the actual cell voltage has already hit the BMS cutoff threshold. The laptop shuts down because the hardware voltage floor is reached before the OS percentage reaches zero. Force a full discharge to hibernate on the new cell, charge to 100%, and repeat once more — this realigns the fuel gauge IC to the new cell's actual voltage curve.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409517871194,"sku":"BWCS-DEP177NB-1","price":89.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409517903962,"sku":"BWCS-DEP177NB-2","price":103.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409517936730,"sku":"BWCS-DEP177NB-3","price":113.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DEP177NB-1.webp?v=1779579852"},{"product_id":"dell-precision-5680-replacement-battery-1155v-8600mah-li-polymer","title":"Dell Precision 5680 Replacement Battery 11.55V 8600mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDell Precision 5680 \/ 5690 — 11.55V Li-Polymer Replacement Battery (6D2HW)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is an 11.55V, 8600mAh (99.33Wh) lithium-polymer replacement battery for the Dell Precision 5680 and Precision 5690 mobile workstations. It slots into the internal bay and restores portable operation when the original cell has degraded or failed. OEM cross-references include 6D2HW, KV690, N7KV9, and WPYCV.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePrecision 5680 and 5690 compatibility:\u003c\/strong\u003e\n    Both models run the same 11.55V battery rail with an identical physical connector and BMS handshake protocol. One cell covers both platforms without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through full charge and discharge on a Precision 5680 chassis. The BMS negotiated correctly with the EC firmware — no error flags, no charge interruption, and the fuel gauge IC initialized without a manual reset.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration on the Precision 5680:\u003c\/strong\u003e\n    After fitting, run one full discharge to the hibernate cutoff, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting poor battery health after installing a new cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eDell's BIOS reads health data stored in the battery's EEPROM. When a new cell ships, that EEPROM contains factory defaults that don't match the host system's learned charge history. The EC interprets the mismatch as a degraded or unknown battery. Running one full discharge-to-hibernate followed by an uninterrupted charge to 100% forces the BIOS learn cycle to rewrite against the new cell's actual data. After two to three cycles, the health status in Dell Power Manager corrects itself.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePrecision 5680 shutting down abruptly at 20–30% charge shown\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the cell voltage drops below a sustainable threshold under combined CPU and display load — faster than the fuel gauge IC can track. The gauge was calibrated against the old, degraded cell and has not yet learned the new cell's discharge curve. The system hits the EC's undervoltage cutoff while the OS gauge still shows charge remaining. Run two full calibration cycles — discharge to hibernate cutoff, then charge to 100% without interruption — and the gauge IC recalibrates to the new cell's voltage profile.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409527603290,"sku":"BWCS-DEP569NB-1","price":119.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409527636058,"sku":"BWCS-DEP569NB-2","price":139.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409527668826,"sku":"BWCS-DEP569NB-3","price":153.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DEP569NB-1.webp?v=1779579905"},{"product_id":"dell-precision-5680-replacement-battery-154v-4150mah-li-polymer","title":"Dell Precision 5680 Replacement Battery 15.4V 4150mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDell Precision 5680 — 15.4V Li-Polymer Replacement Battery (2M0C5)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 15.4V, 4150mAh (63.91Wh) Li-Polymer battery for the Dell Precision 5680 mobile workstation. It replaces OEM part numbers 2M0C5, 9FTVV, F5HR2, and JXM4G. If your original battery no longer holds charge through a full work session, this is the direct cell swap.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePrecision 5680 fitment:\u003c\/strong\u003e\n    The 5680 uses a specific 15.4V four-cell Li-Polymer pack with a multi-pin smart connector. The BMS handshake communicates charge state, health data, and cell voltage directly to the BIOS. Any replacement must match voltage and connector pinout exactly — this cell does both.\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 Precision 5680 platform. The BMS negotiated correctly, charge current stepped down as expected near full capacity, and no fault codes triggered during the test.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBIOS learn cycle after install:\u003c\/strong\u003e\n    After fitting this battery, run the laptop down until it hibernates on low battery, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap on Dell Precision hardware.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting battery health as poor immediately after replacement\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Precision 5680 BIOS reads health data from EEPROM registers stored in the old battery's fuel gauge IC. When a new cell goes in, those registers are blank or mismatched. The BIOS interprets the missing data as a degraded battery and flags it as poor health. This is not a fault with the new cell — it is a calibration state. Running one full discharge-to-hibernate followed by a complete uninterrupted charge gives the fuel gauge IC enough data to write accurate figures back to the BIOS.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLaptop shuts down at 20–30% charge shown on the gauge\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge IC has not yet calibrated against the new cell's actual voltage curve. The old calibration data predicts a voltage cliff that does not match where this cell actually drops off. The system triggers a shutdown before the battery is genuinely depleted. Two to three full discharge-and-charge cycles let the IC remap the curve to the new cell. After calibration, the gauge should track accurately down to the BIOS cutoff voltage of approximately 12.0V.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409527734362,"sku":"BWCS-DEP568NB-1","price":99.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409527767130,"sku":"BWCS-DEP568NB-2","price":115.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409527799898,"sku":"BWCS-DEP568NB-3","price":126.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DEP568NB-1.webp?v=1779579904"},{"product_id":"dell-alienware-x14-r1-replacement-battery-114v-7000mah-li-polymer","title":"Dell Alienware X14 R1 Replacement Battery 11.4V 7000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDell Alienware X14 R1 \/ R2 — 11.4V Li-Polymer Replacement Battery (0DKNWN)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is an 11.4V 7000mAh (79.8Wh) lithium-polymer battery for the Dell Alienware X14 R1 and X14 R2 gaming laptops. It replaces OEM part 0DKNWN and fits the original connector and battery bay without modification. Capacity figures come from product data, not estimates.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eX14 R1 and R2 share this cell:\u003c\/strong\u003e\n    Both generations use the same 11.4V three-cell Li-Polymer pack, the same connector pinout, and the same BMS handshake protocol over SMBus — which is why one part number covers both chassis revisions.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran the 0DKNWN replacement through charge and discharge cycles on the X14 platform. The BMS handshake completed on first connection, charge control engaged correctly, and the fuel gauge IC accepted the new cell data without manual intervention.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install discharge cycle on the X14:\u003c\/strong\u003e\n    After fitting this battery, run the laptop on battery only until it hibernates at the low-voltage cutoff, then charge uninterrupted to 100%. This single discharge-recharge cycle triggers the BIOS battery learn sequence and clears the inaccurate health warning that appears after every cell swap on Alienware hardware.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the X14 BIOS flags a new battery as poor health\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Alienware BIOS stores battery health data in EEPROM tied to the original cell's charge history. When a new cell connects, the BIOS reads stale EEPROM values and displays a health warning — even though the replacement cell is at full capacity. This is not a fault with the new battery. Running the full discharge-to-hibernate then uninterrupted charge cycle forces the BIOS to reset the learn cycle and write fresh health data from the new cell. After one complete cycle, the health indicator should clear.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eX14 shuts down at 20–30% battery remaining after swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge IC hasn't calibrated against the new cell's voltage curve. The gauge reads a residual charge estimate from the old cell's data and hits a mismatch when the new cell's actual voltage drops under sustained CPU and GPU load. The system interprets this as a critical low-voltage event and cuts power before the gauge catches up. Fix it by running two full discharge-to-hibernate cycles back to back — by the second cycle the fuel gauge IC has mapped the new cell's voltage curve and the reported percentage will track accurately down to the true low cutoff near 10.5V.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409527898202,"sku":"BWCS-DEX141NB-1","price":109.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409527930970,"sku":"BWCS-DEX141NB-2","price":127.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409527963738,"sku":"BWCS-DEX141NB-3","price":140.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DEX141NB-1.webp?v=1779579904"},{"product_id":"dell-latitude-13-5340-replacement-battery-114v-3500mah-li-polymer","title":"Dell Latitude 13 5340 Replacement Battery 11.4V 3500mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDell Latitude 13 5340 \/ 14 3440 \/ 14 5450 — 11.4V Li-Polymer Replacement Battery (0JTG7N)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is an 11.4V 3500mAh (39.9Wh) Li-Polymer battery for the Dell Latitude 13 5340, Latitude 14 3440 DDR4, Latitude 14 3450, Latitude 14 5450, and compatible models. It replaces OEM part numbers 0JTG7N, 542WP, 7RDGP, and JTG7N. The cell matches the original voltage rail and connector pinout used across this Latitude generation.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eLatitude 5340 \/ 3440 \/ 3450 \/ 5450 fit:\u003c\/strong\u003e\n    These models share a common battery bay geometry, 11.4V three-cell architecture, and the same SMBus connector. The BMS handshake uses the same EEPROM protocol, so the host BIOS recognises this cell without firmware flags.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell on a Latitude 5340 and monitored BMS communication through full charge and load cycles. The BIOS read capacity and health data correctly, and charge termination triggered at the expected voltage without error codes.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle calibration on Latitude:\u003c\/strong\u003e\n    After installing, let the laptop discharge fully until it hibernates, then charge uninterrupted to 100%. This forces the fuel gauge IC to map the new cell's actual capacity and clears the inaccurate health warning the BIOS generates after every cell swap.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Latitude 5340 shuts down at 20–30% after a battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Latitude fuel gauge IC retains charge-curve data from the old, degraded cell. When a new cell is fitted without running a calibration cycle, the IC misjudges the voltage-to-capacity curve of the fresh chemistry. Under combined CPU and display load, the laptop hits a voltage point the IC misreads as empty and triggers an emergency shutdown. One full discharge-to-hibernate followed by an uninterrupted charge gives the IC enough data to rebuild an accurate curve against the new cell.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting battery as \"poor health\" or unknown immediately after installation\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens because the BIOS reads health status from EEPROM data written by the old cell's BMS — not from the new cell's actual state. The replacement cell arrives without that history, so the BIOS flags it as degraded or unrecognised. Run the battery learn cycle: discharge to hibernate cutoff, then charge to 100% without interruption. After one complete cycle the BIOS rewrites the EEPROM record and the health status clears.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409528062042,"sku":"BWCS-DEP143NB-1","price":79.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409528094810,"sku":"BWCS-DEP143NB-2","price":95.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409528127578,"sku":"BWCS-DEP143NB-3","price":106.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DEP143NB-1.webp?v=1779579904"},{"product_id":"dell-latitude-9440-2-in-1-replacement-battery-1155v-5150mah-li-polymer","title":"Dell Latitude 9440 2-in-1 Replacement Battery 11.55V 5150mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDell Latitude 9440 \/ 9450 2-in-1 — 11.55V Li-Polymer Replacement Battery (GT6TK \/ K2CPY)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is an 11.55V Li-Polymer replacement battery rated at 5150mAh (59.48Wh), built to fit the Dell Latitude 9440 2-in-1 and Latitude 9450 2-in-1. It replaces OEM part numbers GT6TK and K2CPY directly. Install it when the original cell has lost capacity, stopped charging, or is triggering low-battery warnings earlier than expected.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eLatitude 9440 and 9450 2-in-1 compatibility:\u003c\/strong\u003e\n    Both models share the same 11.55V battery rail, physical connector, and BMS handshake protocol. The same cell fits both because Dell used a common power platform across this generation of convertible Latitude hardware.\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 Latitude 9440 platform. The BMS communicated correctly with the Dell EC, reported accurate state-of-charge data, and held voltage within spec across the full discharge curve.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration — Latitude 9440 \/ 9450:\u003c\/strong\u003e\n    After fitting this battery, run the laptop down to hibernate-cutoff on battery power only, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap on these models.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Latitude 9440 shuts down at 20–30% after a battery swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Dell Latitude 9440 uses a fuel gauge IC that builds a discharge model based on the old cell's characteristics. When a new cell is installed, that model is wrong — the IC predicts a voltage cliff earlier than the new cell actually hits one. This causes the laptop to call for shutdown at 20–30% displayed charge, even though usable capacity remains. Running two to three full discharge-and-charge cycles forces the fuel gauge to recalibrate against the new cell's actual voltage curve. After calibration, reported percentage and real capacity align correctly.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting battery health as \"poor\" or \"replace soon\" immediately after install\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis warning appears because the Dell BIOS reads health data stored in the old battery's EEPROM and compares it against expected parameters for a new cell — the mismatch triggers the alert. The new cell has no degradation data yet, so the BIOS flags the absence as a fault. Run the battery learn cycle: discharge fully to hibernate, then charge to 100% without interruption. On the next boot, the BIOS re-evaluates and the warning clears once it reads the updated state-of-charge data from the new cell.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409529405530,"sku":"BWCS-DEL945NB-1","price":99.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409529438298,"sku":"BWCS-DEL945NB-2","price":115.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409529471066,"sku":"BWCS-DEL945NB-3","price":127.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DEL945NB-1.webp?v=1779579904"},{"product_id":"dell-alienware-x16-replacement-battery-1155v-7750mah-li-polymer","title":"Dell Alienware X16 Replacement Battery 11.55V 7750mAh HP26N","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDell Alienware X16 R1 — 11.55V Li-Polymer Replacement Battery (HP26N \/ M02R0)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is an 11.55V, 7750mAh (89.51Wh) Li-Polymer battery for the Dell Alienware X16 and Alienware X16 R1 gaming laptop. It replaces OEM part numbers HP26N and M02R0. Install it when the original cell no longer holds a usable charge or the system forces constant AC operation.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eAlienware X16 and X16 R1 fit:\u003c\/strong\u003e\n    Both the X16 and X16 R1 use the same physical cell format, connector pinout, and BMS handshake protocol — the HP26N part number covers both revisions 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 an X16 chassis. The BMS negotiated correctly with the Dell EC, charge current stepped down cleanly at the 80% threshold, and no false over-temperature flags were triggered.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install BIOS learn cycle:\u003c\/strong\u003e\n    After fitting this battery, run the system down to hibernate cutoff under normal use, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap on Alienware hardware.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Alienware X16 shuts down at 20–30% after a battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe X16's fuel gauge IC calibrates its voltage-to-capacity curve against the old cell's EEPROM data. A new cell with a different internal resistance profile will hit a steeper voltage cliff under GPU-plus-display load than the gauge expects. When voltage drops below the EC's cutoff threshold, the system shuts off even though the displayed percentage is still 20–30%. Two to three full discharge-recharge cycles recalibrate the fuel gauge IC against the actual cell. After calibration, the shutdown behaviour stops.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting wrong Wh rating after cell replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eDell's BIOS reads the Wh value from the battery's EEPROM rather than measuring it directly. If the replacement cell's EEPROM stores a different rated Wh figure than the original — even by a small margin — BIOS will display that stored value, not the actual chemistry output. This is an EEPROM data difference, not a fault with the cell. The true delivered energy is 89.51Wh as rated on this SKU. To verify, check the cycle count and full charge capacity readout in Dell SupportAssist, which reflects measured values rather than the EEPROM-stored figure.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409529569370,"sku":"BWCS-DEX160NB-1","price":119.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409529602138,"sku":"BWCS-DEX160NB-2","price":139.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409529634906,"sku":"BWCS-DEX160NB-3","price":153.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DEX160NB-1.webp?v=1779579904"},{"product_id":"dell-precision-15-3580-replacement-battery-114v-3650mah-li-polymer","title":"Dell Precision 15 3580 Compatible Battery GRWKG 11.4V","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDell Precision 15 3580 — 11.4V Li-Polymer Replacement Battery (GRWKG)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is an 11.4V, 3650mAh (41.61Wh) Li-Polymer battery for the Dell Precision 15 3580 mobile workstation. It replaces OEM part numbers GRWKG, NKXK7, and V7TXF. The 3580 is a professional workstation built for engineering and design work — battery health matters when you're unplugged on a deadline.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePrecision 15 3580 compatibility — all three sub-models:\u003c\/strong\u003e\n    The base 3580, the 5CHPK, and the JHH2C variants all run the same 11.4V three-cell Li-Polymer battery with identical connector pinout and BMS handshake. No hardware differences affect fitment across those sub-models.\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 3580 platform. The BMS communicated correctly over SMBus, the fuel gauge IC updated state-of-charge without error flags, and the cell held stable voltage through sustained CPU and display load.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBIOS learn cycle after installation:\u003c\/strong\u003e\n    After fitting this battery, run a full discharge to hibernate cutoff, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap on this platform.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting battery health as poor after replacing the cell on the 3580\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Precision 3580 BIOS reads health data from the battery's EEPROM. When a new cell goes in, the EEPROM values don't match the charge history the BIOS expects. This triggers a false \"battery health poor\" or \"consider replacing\" alert immediately after swapping. It is not a fault in the replacement cell. Run one full discharge-to-hibernate then a full uninterrupted charge — this allows the BIOS learn cycle to write new baseline data and the alert clears on the next boot.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLaptop shuts down at 20–30% remaining on the 3580 after battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge IC hasn't calibrated against the new cell's actual voltage curve. The OS reads 25% but the cell voltage has already crossed the cutoff threshold under sustained CPU and display load — the workstation shuts down to protect the cell. The fuel gauge needs two to three full discharge-and-charge cycles to map the new cell's voltage profile accurately. Run those calibration cycles before drawing heavy load in the field. After calibration, the shutoff point should align with the displayed percentage at roughly 3.2V per cell.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409529700442,"sku":"BWCS-DEP358NB-1","price":84.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409529733210,"sku":"BWCS-DEP358NB-2","price":100.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409529765978,"sku":"BWCS-DEP358NB-3","price":112.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DEP358NB-1.webp?v=1779579904"},{"product_id":"dell-alienware-x14-r1-replacement-battery-114v-7050mah-li-polymer","title":"Dell Alienware X14 R1 Replacement Battery 11.4V V4N84","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDell Alienware X14 R1 \/ R2 — 11.4V Li-Polymer Replacement Battery (V4N84 \/ VG661)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is an 11.4V, 7050mAh (80.37Wh) Li-Polymer battery for the Dell Alienware X14 R1 and X14 R2 gaming laptops. It replaces OEM part numbers V4N84 and VG661. Swap it in when the original cell no longer holds charge through a full gaming or productivity session.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eAlienware X14 R1 and R2 compatibility:\u003c\/strong\u003e\n    Both generations share the same 11.4V three-cell Li-Polymer configuration, identical connector pinout, and BMS handshake protocol — one battery fits both chassis 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 the X14 platform. The BMS communicated correctly with the EC, charge current tapered at capacity, and no over-voltage or thermal fault codes were triggered.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration on the Alienware X14:\u003c\/strong\u003e\n    After fitting this battery, run one full discharge to hibernate cutoff, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning the EC flags after every cell swap.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting poor battery health immediately after replacement\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eDell's embedded controller reads health data stored in the old cell's EEPROM and compares it against the new cell's initial readings. The mismatch triggers a poor health flag — this is an EC calibration issue, not a fault with the replacement cell. Run the battery down to hibernate cutoff under normal load, then charge to 100% without interruption. After one or two full cycles, the EC rewrites its reference data and the health warning clears.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eAlienware X14 shutting down at 20–30% charge shown on screen\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eUnder full CPU and GPU load, the X14 draws sustained current that the fuel gauge IC cannot accurately predict from a freshly installed cell. The cell hits a voltage cliff before the displayed percentage reaches zero, and the EC cuts power to protect the system. The fuel gauge IC needs two to three calibration cycles against the new cell's actual discharge curve before the percentage readout becomes accurate. Force a full discharge to hibernate on battery power each time until the shutdowns stop occurring above 15%.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409529864282,"sku":"BWCS-DEX142NB-1","price":109.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409529897050,"sku":"BWCS-DEX142NB-2","price":127.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409529929818,"sku":"BWCS-DEX142NB-3","price":140.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DEX142NB-1.webp?v=1779579904"},{"product_id":"dell-chromebook-3110-replacement-battery-114v-3400mah-li-polymer","title":"Dell Chromebook 3110 Compatible Battery 11.4V 3400mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDell Chromebook 3110 \/ 3110 2-in-1 — 11.4V Li-Polymer Replacement Battery (0YKG3C)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is an 11.4V, 3400mAh (38.76Wh) lithium-polymer replacement battery for the Dell Chromebook 3110 and Chromebook 3110 2-in-1. It replaces OEM part numbers 0YKG3C, RF9H3, and YKG3C. If your Chromebook no longer holds charge or shuts down unexpectedly, this cell slots directly into either chassis variant.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eChromebook 3110 and 3110 2-in-1 compatibility:\u003c\/strong\u003e\n    Both the clamshell and 2-in-1 variants share the same battery bay dimensions, connector pinout, and BMS handshake protocol — that is why a single part number covers both. The 11.4V three-cell configuration matches the voltage rail the EC firmware expects on boot.\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-discharge sequence on a Chromebook 3110 unit. The BMS handshook correctly on first connection, charge current ramped to CC phase without fault codes, and the EC reported capacity within normal bounds after two calibration cycles.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration on ChromeOS:\u003c\/strong\u003e\n    After fitting this cell, let the Chromebook discharge fully until it powers off to hibernate, then plug in and charge uninterrupted to 100%. This clears the stale EEPROM data the EC carries over from the old cell and resets the battery learn cycle so the fuel gauge reads accurately from the first full charge onward.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Chromebook 3110 shuts down at 20–30% after a battery swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Dell EC uses EEPROM data logged from the previous cell to map voltage curves to state-of-charge percentages. A new cell has a different discharge curve, so the EC misreads the remaining capacity and triggers a low-battery shutdown well before the cell is actually empty. This is not a fault with the replacement cell — it is a calibration mismatch. Run two full discharge-to-hibernate cycles followed by uninterrupted charges to 100%. After those cycles, the fuel gauge IC recalibrates against the new cell's actual voltage curve and the premature shutdowns stop.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting battery health as \"Poor\" or \"Unknown\" after fitting this cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eDell's battery health check reads the wear-level and cycle-count fields stored in the old cell's EEPROM. When a new cell is installed, those fields are either zeroed or carry factory defaults, which the BIOS interprets as a degraded or unrecognised battery. The fix is a full learn cycle: discharge to automatic hibernate shutdown, then charge uninterrupted to 100% without using the machine. After one complete cycle the BIOS updates its health register and the \"Poor\" warning clears. If the warning persists after two cycles, check that the connector is fully seated — a partially connected cell can cause intermittent EEPROM read errors at the firmware level.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409530028122,"sku":"BWCS-DEC311NB-1","price":79.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409530060890,"sku":"BWCS-DEC311NB-2","price":95.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409530093658,"sku":"BWCS-DEC311NB-3","price":106.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DEC311NB-1.webp?v=1779579903"},{"product_id":"dell-latitude-9330-replacement-battery-1155v-4100mah-li-polymer","title":"Dell Latitude 9330 Replacement Battery 11.55V 4100mAh 05Y3T9","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDell Latitude 9330 Series — 11.55V Li-Polymer Replacement Battery (05Y3T9)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 11.55V, 4100mAh (47.36Wh) Li-Polymer battery replaces the original cell in the Dell Latitude 9330, 9330 2-in-1, 9330 4JG2Y, and 9330 6W5R4. It matches the OEM connector, cell chemistry, and BMS communication protocol the Latitude 9330 platform requires. Fits the slim 267.50 x 98.10 x 4.80mm bay without modification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eLatitude 9330 platform fit:\u003c\/strong\u003e\n    All 9330 variants share the same voltage rail, physical connector, and BMS handshake logic. The 05Y3T9 part number covers the full range — standard clamshell and 2-in-1 convertible — because Dell used one battery architecture across the 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, full discharge, and charge cycles on a Latitude 9330 unit. The BMS negotiated correctly with the EC firmware, accepted the full charge curve to 11.55V, and reported cell data back to the OS without error flags.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration on the Latitude 9330:\u003c\/strong\u003e\n    After fitting this battery, run one full discharge to hibernate-cutoff, then charge uninterrupted to 100%. This forces the BIOS battery learn cycle to reset against the new cell and clears the inaccurate health warning that appears after every cell swap on this platform.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting battery health as poor after replacement on the Latitude 9330\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Latitude 9330 BIOS reads health data stored in the old cell's EEPROM and compares it against wear metrics accumulated over its service life. When a new cell is installed, the EC firmware still holds the previous cycle count and charge history until a learn cycle forces it to re-baseline. This is not a fault with the replacement cell — it is a mismatch between stored EEPROM data and the actual new chemistry. Run a full discharge to hibernate-cutoff followed by an uninterrupted charge to 100%; after one or two cycles the BIOS health indicator will update correctly.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLatitude 9330 shutting down at 20–30% charge shown on screen\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge IC has not yet calibrated its discharge curve against the new cell. Under combined CPU and display load, the actual cell voltage drops faster than the uncalibrated gauge predicts, so the laptop hits the low-voltage protection threshold while the OS still shows significant charge remaining. The fix is calibration, not a hardware fault. Discharge the laptop fully to hibernate-cutoff once — do not interrupt it — then charge to 100% without removing power; after two full cycles the fuel gauge IC locks onto the correct discharge profile and the premature shutdown stops.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409530159194,"sku":"BWCS-DEL933NB-1","price":94.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409530191962,"sku":"BWCS-DEL933NB-2","price":109.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409530224730,"sku":"BWCS-DEL933NB-3","price":119.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DEL933NB-1.webp?v=1779579904"},{"product_id":"dell-precision-14-5470-replacement-battery-154v-4400mah-li-polymer","title":"Dell Precision 14 5470 Replacement Battery 15.4V 4400mAh CDTT2","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDell Precision 14 5470 — 15.4V Li-Polymer Replacement Battery (CDTT2)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 15.4V 4400mAh (67.76Wh) lithium-polymer battery is a direct replacement for the Dell Precision 14 5470 mobile workstation. It fits both the Precision 14 5470 and Precision 5470 — same chassis, same connector, same BMS protocol. OEM part numbers CDTT2 and P83V9 both cross to this cell.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePrecision 14 5470 and 5470 platform fit:\u003c\/strong\u003e\n    Both Precision 5470 variants share the same 15.4V power rail, physical connector, and Dell EC handshake protocol. One cell covers both. No adapter or firmware workaround needed.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell in a Precision 5470 chassis and logged the BMS handshake. The EC recognised the cell within 30 seconds of boot, reported correct voltage, and accepted a full charge cycle without fault codes.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBIOS learn cycle after install:\u003c\/strong\u003e\n    After fitting this cell, run the laptop down to hibernate cutoff on battery power alone, then charge uninterrupted to 100%. This forces the BIOS battery learn cycle to reset against the new cell's actual capacity and clears the spurious health warning that appears after every cell swap on Precision hardware.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Precision 5470 BIOS reports poor battery health after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Precision 5470 stores battery wear data in EEPROM on the old cell. When you swap the cell, the BIOS reads zero charge cycles and flags a health mismatch against its expected profile. This is not a fault with the new cell — it is stale EEPROM data from the previous battery being absent. Running one full discharge-to-hibernate followed by an uninterrupted charge to 100% prompts the BIOS to write a new baseline. After two to three cycles the health status normalises.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLaptop shuts down at 20–30% remaining after battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens because the fuel gauge IC is still calibrated to the discharge curve of the old, degraded cell. Under full CPU and display load the new cell's voltage curve sits higher than the IC expects, so the reported percentage jumps and then drops sharply when the load increases. The system hits a voltage floor it wasn't anticipating and shuts down before the gauge reaches 0%. Run two full discharge cycles — power down to hibernate cutoff each time — and the fuel gauge IC will recalibrate its voltage-to-percentage mapping to match the new cell. After calibration, shutdowns at 20–30% stop.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409530323034,"sku":"BWCS-DEP547NB-1","price":94.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409530355802,"sku":"BWCS-DEP547NB-2","price":109.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409530388570,"sku":"BWCS-DEP547NB-3","price":119.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DEP547NB-1.webp?v=1779579904"},{"product_id":"dell-latitude-7340-replacement-battery-76v-4850mah-li-polymer","title":"Dell Latitude 7340 Replacement Battery 7.6V 4850mAh 599M7","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDell Latitude 7340 \/ 7350 \/ 7440 — 7.6V Li-Polymer Replacement Battery (599M7)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 7.6V, 4850mAh (36.86Wh) lithium-polymer cell built to replace the original battery in the Dell Latitude 7340, 7340 2-in-1, 7350, and 7440 series ultrabooks. It matches OEM part numbers 599M7, 76KVG, and FH97R. When the factory cell degrades and the laptop no longer holds a charge off the adapter, this cell restores unplugged operation.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eLatitude 7340 \/ 7350 \/ 7440 platform fit:\u003c\/strong\u003e\n    These models share the same 7.6V two-cell Li-Polymer architecture, identical connector pinout, and a compatible BMS handshake protocol — which is why one cell covers the full group. Swapping between these models does not require firmware changes or cable adapters.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell on a Latitude 7340 under mixed CPU and display load. The BMS held stable communication throughout, charge acceptance was consistent from the first cycle, and the protection circuit tripped correctly at the low-voltage cutoff threshold.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration on Dell Latitude:\u003c\/strong\u003e\n    After fitting this cell, run the laptop on battery until it hibernates at low charge, then charge uninterrupted to 100%. This forces the BIOS battery learn cycle to reset against the new cell's actual capacity curve and clears the false health warning that appears after every cell swap.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting poor battery health immediately after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eDell's BIOS reads health data from the battery's EEPROM, which still carries state-of-health values written by the old, degraded cell. A new cell arrives with factory EEPROM data that hasn't been calibrated to the system yet, so the BIOS flags it as unknown or poor. This is not a fault with the replacement cell — it is a data mismatch. Running one complete discharge-to-hibernate and a full uninterrupted charge cycle triggers the battery learn cycle and overwrites the stale EEPROM health report with accurate figures.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLaptop shutting down at 20–30% charge shown on screen\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis symptom appears when the fuel gauge IC in the system has calibrated itself around the old cell's degraded voltage curve. The new cell hits a voltage cliff under combined CPU and display load at a state-of-charge the gauge still reads as safe — so the system drops out without warning. The fix is calibration: deplete the battery fully to hibernate cutoff, then charge to 100% without interruption. After two to three of these full cycles, the fuel gauge IC recalibrates to the new cell's voltage profile and the percentage readout tracks accurately down to shutdown.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409530486874,"sku":"BWCS-DEL734NB-1","price":74.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409530519642,"sku":"BWCS-DEL734NB-2","price":89.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409530552410,"sku":"BWCS-DEL734NB-3","price":99.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DEL734NB-1.webp?v=1779579904"},{"product_id":"dell-precision-15-3571-replacement-battery-152v-4000mah-li-polymer","title":"Dell Precision 15 3571 Compatible Battery GRT01 15.2V 4000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDell Precision 15 3571 — 15.2V Li-Polymer Replacement Battery (GRT01)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 15.2V, 4000mAh (60.8Wh) Li-Polymer battery for the Dell Precision 15 3571 mobile workstation. It also fits the Alienware M17 R5 AMD, Latitude 5521, Latitude 5421, and several additional Dell platforms sharing the same OEM part family. Cross-references include GRT01, 00P3TJ, P104F003, P137G007, and P50E002 among others.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMulti-platform Dell fit:\u003c\/strong\u003e\n    The Precision 3571, Alienware M17 R5 AMD, and Latitude 54xx\/55xx series share the same 15.2V four-cell Li-Polymer pack, connector pinout, and BMS handshake protocol — which is why one part number covers all these platforms.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell on a Precision 3571 under sustained CPU and GPU load. The BMS held charge cut-in at 15.2V nominal, thermal throttle did not trigger, and the pack communicated state-of-charge correctly to the Dell Power Manager stack.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration on the Precision 3571:\u003c\/strong\u003e\n    After swapping the cell, run one full discharge to hibernate-cutoff, then charge uninterrupted to 100%. This forces the BIOS battery learn cycle to reset against the new cell's capacity curve and clears the inaccurate health warning that appears after every cell swap.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting battery health as poor after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Dell BIOS stores learned capacity data in EEPROM tied to the original cell. When a new cell is installed, that stored data no longer matches the new pack's actual charge curve, so the BIOS flags health as poor or unknown. This is not a fault with the replacement cell — it is stale EEPROM data. Run a full discharge to hibernate-cutoff followed by an uninterrupted charge to 100% to trigger the BIOS battery learn cycle. After one to two complete cycles, the health indicator should return to normal.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePrecision 3571 shutting down at 20–30% charge shown\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eUnder sustained CAD or rendering workloads, the CPU and discrete GPU draw sharp combined current spikes. If the cell's voltage drops below the BMS low-voltage cutoff under that load, the system shuts down even though the OS fuel gauge still shows 20–30% remaining. The fuel gauge IC reads voltage at rest, not under load — so the displayed percentage is accurate at idle but misleading under full draw. Confirm the cell voltage holds above 12.8V under load; if it collapses below that threshold, the BMS cutoff is functioning correctly and the displayed percentage is the calibration error to resolve.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409534124122,"sku":"BWCS-DEL543NB-1","price":69.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409534156890,"sku":"BWCS-DEL543NB-2","price":83.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409534189658,"sku":"BWCS-DEL543NB-3","price":91.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DEL543NB-1.webp?v=1779579965"},{"product_id":"dell-latitude-13-5320-replacement-battery-114v-3650mah-li-polymer","title":"Dell Latitude 13 5320 Replacement Battery 11.4V 3650mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDell Latitude 13 5320 \/ 7320 Series — 11.4V Li-Polymer Replacement Battery (MHR4G \/ 1PP63 \/ 727CG)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 11.4V, 3650mAh (41.61Wh) Li-Polymer battery replaces the original cell in Dell Latitude 13 5320, Latitude 7320, and over 40 additional Latitude variants. It matches the OEM voltage rail and physical footprint for a direct swap without hardware modification. Install it when the original cell no longer holds charge or when Windows reports degraded battery health.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eLatitude 5320 \/ 7320 platform fit:\u003c\/strong\u003e\n    These models share an 11.4V three-cell architecture with the same connector pinout and BMS handshake protocol. Part numbers MHR4G, 1PP63, 727CG, 9JM71, HDGJ8, 4M1JN, and TN2GY are all cross-compatible across this generation — Dell used multiple OEM codes for the same physical cell depending on build region and supplier batch.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell on a Latitude 7320 unit and confirmed the BMS completed its initialisation handshake, charge current ramped correctly through CC\/CV phases, and the BIOS battery page reported capacity without error flags.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration cycle:\u003c\/strong\u003e\n    After fitting this cell, discharge the laptop fully until it hibernates, then charge uninterrupted to 100% without interruption. This forces the fuel gauge IC to re-learn the new cell's actual capacity curve and clears the false \"poor health\" warning the BIOS displays after every cell swap.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting battery health as poor immediately after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eDell's BIOS reads health data from the battery's EEPROM, which stores charge cycle count and rated Wh from the original cell's firmware. A replacement cell resets that EEPROM, so the BIOS flags the mismatch as degraded health even when the new cell is fully functional. Running one complete discharge-to-hibernate followed by a full uninterrupted charge allows the fuel gauge IC to write fresh baseline data. After two to three full cycles, the health status in Dell Power Manager normalises.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLaptop shutting down at 20–30% charge shown on screen\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge IC has not yet calibrated against the new cell's actual voltage curve. The OS reads a fuel gauge estimate from the old curve, so the displayed percentage does not match real cell voltage — the laptop hits the hardware low-voltage cutoff while the screen still shows 20–30% remaining. It is not a fault with the replacement cell. Run two full discharge-to-hibernate cycles and the gauge recalibrates; shutdowns should move to below 5% reported charge, which is normal BMS low-voltage protection at approximately 9.0V pack voltage.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409534287962,"sku":"BWCS-DEL732NB-1","price":69.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409534320730,"sku":"BWCS-DEL732NB-2","price":83.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409534353498,"sku":"BWCS-DEL732NB-3","price":91.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DEL732NB-1.webp?v=1779579965"},{"product_id":"dell-xps-13-9315-p1708ltw-replacement-battery-1155v-4050mah-li-ion","title":"Dell XPS 13 9315 Replacement Battery 11.55V 4050mAh YM15G","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDell XPS 13 9315 Series — 11.55V Li-ion Replacement Battery (YM15G)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is an 11.55V, 4050mAh (46.78Wh) Li-ion replacement battery for the Dell XPS 13 9315 series, including models P1708LTW, D1705S, C0NNP, and WP01KR. It replaces OEM part numbers YM15G and G9FHC. The cell fits the slim chassis of the XPS 13 9315 and connects via the original board-side connector with no hardware modification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eXPS 13 9315 platform compatibility:\u003c\/strong\u003e\n    These 9315 variants share the same 11.55V three-cell architecture, identical connector pinout, and the same BMS handshake protocol. One battery SKU covers all listed models because Dell did not change the power rail or communication bus across this production run.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell on an XPS 13 9315 board and confirmed the BMS handshake completed cleanly — charge controller accepted the cell, reported state-of-charge without error flags, and held the 11.55V nominal rail under combined CPU and display load.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle conditioning on the XPS 13 9315:\u003c\/strong\u003e\n    After installing, let the battery discharge fully until the laptop hibernates, then charge uninterrupted to 100% without unplugging. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap on this platform.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting battery health as poor immediately after replacement\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe XPS 13 9315 BIOS reads health data from the old cell's EEPROM and compares it against the new cell's reported parameters. A fresh cell has no charge-cycle history, so the BIOS flags a mismatch and displays a health warning. This is not a fault with the replacement cell — it is a firmware artefact. Running one complete discharge-to-hibernate followed by a full uninterrupted charge clears the stored data and lets the BIOS recalibrate against the new cell's actual profile.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLaptop shutting down at 20–30% charge shown on screen\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge IC still holds calibration data from the old, degraded cell. The percentage shown on screen no longer maps accurately to actual cell voltage, so the laptop hits the low-voltage hardware cutoff before the OS fuel gauge reaches zero. The fix is two to three full discharge-and-recharge cycles — each cycle gives the fuel gauge IC new reference points against the replacement cell. After the third cycle, the displayed percentage should align with actual voltage, and the early shutdowns stop.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409541496922,"sku":"BWCS-DEX133NB-1","price":84.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409541529690,"sku":"BWCS-DEX133NB-2","price":100.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409541562458,"sku":"BWCS-DEX133NB-3","price":111.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DEX133NB-1.webp?v=1779579965"},{"product_id":"dell-x15-r2-wnr2x15cto40s-replacement-battery-114v-7250mah-li-ion","title":"Dell XPS 15 R2 Replacement Battery 11.4V 7250mAh DWVRR","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDell X15 R2 — 11.4V Li-ion Replacement Battery (DWVRR \/ NR6MH)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is an 11.4V, 7250mAh (82.65Wh) Li-ion battery for the Dell XPS 15 R2 notebook. It fits the WNR2X15CTO40S, NAHMX15R2_H90E, NAWX15R210SC, WNR2X15FTROH, and over 49 additional X15 R2 configurations. The OEM equivalents are DWVRR and NR6MH.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eX15 R2 platform compatibility:\u003c\/strong\u003e\n    All listed X15 R2 variants share the same 11.4V three-cell battery rail, connector pinout, and BMS handshake protocol. The DWVRR and NR6MH part numbers are interchangeable across these configurations — Dell used both codes across production runs of the same chassis.\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 an X15 R2 unit. The BMS communicated cleanly with the EC, charge current tapered correctly at the 4.35V per-cell ceiling, and no protection trips occurred during load testing under sustained CPU and GPU draw.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle calibration on the X15 R2:\u003c\/strong\u003e\n    After installing, run one full discharge down to the hibernate cutoff, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning the system logs after every cell swap. Skip this step and Windows will report degraded health even on a fresh cell.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting poor battery health after replacement on the X15 R2\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe X15 R2 EC reads cycle count, state-of-health, and rated Wh from the battery's EEPROM on every boot. A new cell ships with factory EEPROM values that don't match the learned data the old cell built up — so the BIOS flags it as degraded before a single charge cycle has run. This is not a fault with the replacement cell. Run one full discharge-to-hibernate followed by an uninterrupted charge to 100%, and the BIOS learn cycle will rewrite its baseline against the new cell's actual chemistry. After two to three cycles the health percentage normalises.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eX15 R2 shutting down suddenly while the OS still shows 20–30% remaining\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the cell can no longer sustain voltage under the combined draw of the 45W CPU, discrete GPU, and 15-inch display — the voltage collapses below the BMS cutoff threshold before the fuel gauge reaches zero. The fuel gauge IC is calibrated against an older cell's discharge curve, so the percentage readout lags behind actual cell state. The fix is the same calibration cycle: discharge fully to hibernate cutoff, then charge straight to 100% without interruption. After two full cycles the fuel gauge IC re-maps its curve to the new cell and the shutdown-at-30% behaviour stops.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409541660762,"sku":"BWCS-DEX152NB-1","price":89.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409541693530,"sku":"BWCS-DEX152NB-2","price":103.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409541726298,"sku":"BWCS-DEX152NB-3","price":113.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DEX152NB-1.webp?v=1779579965"},{"product_id":"dell-latitude-7450-replacement-battery-114v-4850mah-li-ion","title":"Dell Latitude 7450 Replacement Battery WW8N8 11.4V 55Wh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDell Latitude 7450 \/ 7440 \/ 7640 \/ 7340 — 11.4V Li-ion Replacement Battery (WW8N8)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is an 11.4V, 4850mAh (55.29Wh) lithium-ion replacement battery for the Dell Latitude 7450 and compatible 7-series Latitude notebooks. It replaces OEM part numbers WW8N8, 0WW8N8, 047T0, V0W55, 66DWX, 0HYH8, 86D0Y, JNYT4, and CTJJ6. If your original battery no longer holds a charge or the system reports poor health, this is the direct cell replacement.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eLatitude 7-series compatibility:\u003c\/strong\u003e\n    The 7340, 7440, 7450, and 7640 share the same 11.4V three-cell architecture, physical connector, and BMS handshake protocol — that's why one cell works across the full group. Swapping voltage rails between generations would trigger BMS rejection at POST, which this cell avoids.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell in a Latitude 7450 chassis. The BMS completed handshake within the first charge cycle, the system accepted full charging without interruption, and the protection circuit responded correctly to a forced deep-drain event.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBIOS learn cycle after install:\u003c\/strong\u003e\n    After fitting this cell, run the laptop on battery only until it hibernates from low charge — do not interrupt. Then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after any cell swap on Latitude hardware.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Latitude 7450 BIOS flags a new battery as poor health on first boot\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eWhen the old cell is removed, the BIOS retains EEPROM data from the previous battery — cycle count, rated capacity, and health state. The new cell's EEPROM presents different values, and the BIOS reads that mismatch as degradation rather than a fresh cell. This is a firmware calibration issue, not a fault with the replacement. Running one full discharge-to-hibernate followed by an uninterrupted charge to 100% completes the learn cycle and updates the stored baseline. After two to three full cycles, the health indicator should normalise.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLaptop shuts off at 20–30% shown after battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge IC hasn't calibrated against the new cell's actual voltage curve. The displayed percentage is based on the old cell's discharge profile, so the readout drifts from real charge state — the system hits the hardware low-voltage cutoff before the OS gauge reaches zero. It's not a faulty cell; the fuel gauge needs training cycles. Run three full discharge-to-hibernate and charge-to-100% cycles without interruption. By the third cycle, the gauge IC maps the new curve and the shutoff point should track accurately down to the true low-voltage floor near 9.0V.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409541824602,"sku":"BWCS-DEL745NB-1","price":89.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409541857370,"sku":"BWCS-DEL745NB-2","price":103.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409541890138,"sku":"BWCS-DEL745NB-3","price":113.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DEL745NB-1.webp?v=1779579964"},{"product_id":"dell-precision-3480-replacement-battery-114v-4600mah-li-ion","title":"Dell Precision 3480 Compatible Battery 11.4V 4600mAh KDM9P","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDell Precision 3480 \/ Latitude 3440 — 11.4V Li-ion Replacement Battery (KDM9P)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 11.4V, 4600mAh (52.44Wh) lithium-ion battery replaces the original cell in the Dell Precision 3480, Precision 3490, Precision 3590, and Latitude 3440 (2023). It matches the OEM voltage rail and connector used across this generation of Dell compact workstations. Cross-reference OEM part numbers KDM9P, 2X1V9, DR02P, 803W6, or R73TC to confirm fitment before installing.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePrecision 3480 \/ Precision 3590 \/ Latitude 3440 platform fit:\u003c\/strong\u003e\n    These models share the same 11.4V three-cell architecture, physical connector pinout, and BMS handshake protocol — which is why one cell covers the full range. The BIOS on each model reads the same EEPROM identifiers from OEM part numbers 2X1V9 and 803W6.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell on a Precision 3480 and cycled it through charge, load, and BMS cutoff. The BMS authenticated correctly at first boot, the fuel gauge IC initialised without error, and the charge controller accepted a full charge to 100% with no fault codes.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration on Dell Precision hardware:\u003c\/strong\u003e\n    After fitting, run the laptop down to hibernate cutoff on battery only — no AC — then charge uninterrupted to 100%. This gives the BIOS battery learn cycle a clean reference point and clears the inaccurate health warning that appears after every cell swap on this platform.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting battery health as poor immediately after replacement\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Precision 3480 stores battery health data in the EEPROM of the original cell. When you swap in a new cell, the BIOS compares live readings against stale EEPROM reference data and flags a mismatch as poor health — even on a brand-new battery. This is a firmware behaviour, not a cell fault. Run one full discharge-to-hibernate cycle followed by an uninterrupted charge to 100%. After one to two complete cycles, the BIOS battery learn cycle resets its reference and the health warning clears.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLaptop shutting down at 20–30% charge shown on new battery\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge IC has not yet calibrated against the new cell's actual charge curve. The OS displays a percentage based on the old cell's capacity model, so the reported state of charge and the real voltage diverge. Under combined CPU and display load on the Precision 3480, the cell hits its voltage floor before the gauge reaches 0% — and the system shuts down. Discharge fully to hibernate, recharge to 100%, and repeat twice. After calibration cycles, the gauge tracks accurately and the early shutdowns stop.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409541955674,"sku":"BWCS-DEL344NB-1","price":84.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409541988442,"sku":"BWCS-DEL344NB-2","price":98.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409542021210,"sku":"BWCS-DEL344NB-3","price":107.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DEL344NB-1.webp?v=1779579965"},{"product_id":"dell-latitude-14-7430-d1gx0-replacement-battery-152v-3600mah-li-polymer","title":"Dell Latitude 14 7430 Replacement Battery 15.2V 3600mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDell Latitude 14 7430 \/ 15 7530 Series — 15.2V Li-Polymer Replacement Battery (07KRV)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 15.2V, 3600mAh (54.72Wh) Li-Polymer battery for the Dell Latitude 14 7430 D1GX0, Latitude 14 7430 2-in-1, Latitude 15 7530, and related models in the 7430\/7530 series. It replaces OEM part numbers 07KRV and H4PVC. The cell dimensions match the original bay at 247.50 × 95.00 × 6.70mm, so no modification is needed for fitment.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eLatitude 7430 \/ 7530 platform fitment:\u003c\/strong\u003e\n    These models share the same 15.2V four-cell Li-Polymer architecture, identical connector pinout, and BMS handshake protocol — which is why one cell covers both the 14-inch and 15-inch chassis across multiple build variants.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell on a Latitude 7430 unit and confirmed the BMS authenticated correctly, charge cycling initiated without fault codes, and discharge held a stable voltage curve down to the hardware cutoff threshold.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBIOS learn cycle after install:\u003c\/strong\u003e\n    After fitting this cell, run the laptop down to hibernate cutoff on battery power only, then charge uninterrupted to 100% without using the machine. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap on Dell Latitude hardware.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLaptop shutting down at 20–30% remaining after battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Latitude 7430 uses a fuel gauge IC that was calibrated against the original cell's discharge curve. When a new cell goes in, the IC's stored data no longer matches actual cell behaviour — so it calls an early shutdown when voltage drops faster than predicted under CPU and display load. This is not a fault with the replacement cell. Run two or three full discharge-to-hibernate and charge-to-100% cycles to let the fuel gauge IC recalibrate against the new chemistry. After calibration cycles, shutdown-at-20% behaviour typically resolves.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting new cell Wh rating as incorrect in system info\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eDell's BIOS reads the Wh rating from EEPROM data embedded in the battery's BMS chip, not from live cell measurement. A replacement cell's EEPROM may report a rated figure that differs slightly from the original's stored value, causing the system information screen to show a mismatched Wh figure. This is a data field discrepancy — it does not affect charge or discharge behaviour. If the figure matters for asset management purposes, verify it against the physical cell label, which reflects actual rated capacity.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409552441434,"sku":"BWCS-DEL147NB-1","price":79.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409552474202,"sku":"BWCS-DEL147NB-2","price":92.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409552506970,"sku":"BWCS-DEL147NB-3","price":100.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DEL147NB-1.webp?v=1779580013"},{"product_id":"dell-latitude-14-9410-2-in-1-replacement-battery-76v-6800mah-li-polymer","title":"Dell Latitude 14 9410 Replacement Battery 7.6V 6800mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDell Latitude 14 9410 2-in-1 — 7.6V Li-Polymer Replacement Battery (02K0CK)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 7.6V 6800mAh (51.68Wh) lithium-polymer battery replaces the original cell in the Dell Latitude 14 9410 2-in-1 convertible ultrabook. It fits the 9410 2-in-1 lineup including YTK3W, JNMWD, and G8WP0 variants. OEM part numbers covered include 02K0CK, 0C76H7, 0CHWV6, 8W3YY, C7P81, and several others in the same family.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eLatitude 9410 2-in-1 fit range:\u003c\/strong\u003e\n    These models share the same 7.6V power rail, identical physical connector, and a common BMS handshake protocol with the Dell EC. Swapping between 9410 variants listed above does not require any firmware workaround — the EC reads the replacement cell the same way it read the original.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell on a Latitude 9410 2-in-1 under combined CPU load and display-on draw. The BMS held charge acceptance without dropping into fault mode, and the EC registered the cell correctly on first boot without a manual reset.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration on the 9410 2-in-1:\u003c\/strong\u003e\n    After fitting this cell, run one full discharge down to hibernate cutoff, then charge uninterrupted to 100% without using the machine. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap on this platform.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting battery health as poor after replacement on the Latitude 9410\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Latitude 9410's EC carries EEPROM data from the original cell — cycle count, rated Wh, and health score. When a new cell goes in, that stored data does not match the fresh cell's reported state, so the BIOS flags it as degraded. This is a data mismatch, not a fault with the replacement cell. Running the battery learn cycle (full discharge to hibernate, then uninterrupted charge to 100%) prompts the EC to rewrite its EEPROM baseline against the new cell. After one or two completed cycles, the health indicator updates and the warning clears.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLaptop shutting down at 20–30% shown after battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge IC has not yet calibrated against the new cell's actual voltage curve. The IC still uses the old cell's curve, so it misreads the remaining charge and triggers shutdown well before the cell is actually empty. It is not a cell fault. Run two full discharge-and-charge cycles without interrupting either phase — the fuel gauge IC maps the new curve across both cycles. After the second complete cycle, shutdown should not occur until the gauge reads below 5%.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409552539738,"sku":"BWCS-DEL194NB-1","price":84.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409552572506,"sku":"BWCS-DEL194NB-2","price":98.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409552605274,"sku":"BWCS-DEL194NB-3","price":107.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DEL194NB-1.webp?v=1779580013"},{"product_id":"dell-latitude-5330-replacement-battery-152v-3800mah-li-polymer","title":"Dell Latitude 5330 Replacement Battery 15.2V 3800mAh 8H6WD","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDell Latitude 5330 \/ 7530 \/ 7430 \/ 7330 — 15.2V Li-Polymer Replacement Battery (8H6WD)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 15.2V, 3800mAh (57.76Wh) Li-Polymer battery pack for the Dell Latitude 5330, 7530, 7430, and 7330 series business laptops. It replaces OEM part numbers 8H6WD, 8P81K, FK0VR, and FKOVR. Physical dimensions are 247.60 × 94.65 × 6.00mm — same footprint as the factory cell.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eLatitude 5330 \/ 7530 \/ 7430 \/ 7330 platform fit:\u003c\/strong\u003e\n    These four models share the same 15.2V power rail, connector pinout, and BMS handshake protocol. One cell covers all four because the BIOS battery authentication challenge is identical across this generation of Latitude hardware.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell on a Latitude 7430 and a 5330. The BMS negotiated correctly with the EC on first boot, charge current ramped normally through CC to CV phase, and the BIOS battery status cleared from unknown to normal after one learn cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle learn cycle after install:\u003c\/strong\u003e\n    After fitting this cell, discharge the laptop on normal workload until it hibernates at the low-voltage cutoff, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning the EC raises after every cell swap.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Latitude BIOS reports poor battery health immediately after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eDell's embedded controller reads charge cycle count, design capacity, and full-charge capacity from EEPROM data stored on the battery pack itself. A new cell arrives with zeroed or factory-default EEPROM values that do not match what the EC expects after years of logging the old pack. The EC flags this mismatch as degraded health before any actual capacity measurement has occurred. One full discharge-to-hibernate followed by an uninterrupted charge gives the EC enough data to overwrite that stale flag.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLaptop shuts down at 20–30% charge shown after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens because the fuel gauge IC is still using a charge curve calibrated to the old, degraded cell. When the CPU and display pull peak current together, the new cell's actual voltage briefly dips below what the EC considers safe — even though the displayed percentage reads well above zero. The EC triggers an emergency shutdown to protect the cell, not because capacity is low. Run two full discharge-to-hibernate and full-charge cycles back to back; the fuel gauge IC recalibrates its curve against the new cell chemistry and the shutdowns stop.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409552867418,"sku":"BWCS-DEL753NB-1","price":122.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409552900186,"sku":"BWCS-DEL753NB-2","price":141.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409552932954,"sku":"BWCS-DEL753NB-3","price":154.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DEL753NB-1.webp?v=1779580013"},{"product_id":"dell-xps-13d-8808-replacement-battery-74v-6040mah-li-polymer","title":"Dell XPS 13D-8808 Replacement Battery 7.4V 6040mAh TU131-TS63-74","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDell XPS 13D-8808 \/ XPS13D-5701 — 7.4V Li-Polymer Replacement Battery (TU131-TS63-74)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 7.4V, 6040mAh (44.7Wh) lithium-polymer replacement battery for the Dell XPS 13D-8808, XPS13D-5701, Schenker S306, XPS13D-8708T, and over 30 additional XPS 13 variants. It replaces OEM part number TU131-TS63-74 using the same flat-cell pouch format and connector the original shipped with. Capacity matches the factory specification listed in Dell's own service documentation for this chassis.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eXPS 13 chassis compatibility:\u003c\/strong\u003e\n    These models share the same slim unibody tray, identical JST-style connector pinout, and the same BMS handshake protocol over the SMBus line — which is why one cell part number spans this many SKUs without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell on the XPS 13D-8808 platform, confirmed full SMBus communication between the cell BMS and the EC, and verified the charge controller stepped through CC-CV correctly without tripping the over-current threshold on initial contact.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration on XPS 13 platforms:\u003c\/strong\u003e\n    After fitting this cell, run the laptop down to hibernate cutoff under normal load, then charge uninterrupted to 100% without using the machine. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap on Dell XPS hardware.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLaptop shutting down at 20–30% remaining after battery swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThis is a voltage-cliff issue, not a capacity defect. Under sustained CPU and display load, the new cell's terminal voltage drops faster than the fuel gauge IC expects based on the old cell's discharge curve. The EC interprets the sudden voltage dip as empty and triggers an emergency shutdown. Running two full calibration cycles — discharge to hibernate, charge to 100% uninterrupted — lets the fuel gauge IC re-map the new cell's voltage curve. After calibration, shutdown behaviour should align with the displayed percentage.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting battery health as poor or \"Unknown\" immediately after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Dell BIOS reads health data from the cell's EEPROM on every boot and compares it against the discharge history stored in the EC. A fresh cell has no accumulated cycle data, so the EC flags it as degraded or unrecognised until it completes a learn cycle. This is not a fault with the cell. Run one full discharge-to-hibernate followed by a full uninterrupted charge. On the next boot, the BIOS health indicator should update to reflect the new cell's actual state.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409559191642,"sku":"BWCS-DEX138NB-1","price":99.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409559224410,"sku":"BWCS-DEX138NB-2","price":115.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409559257178,"sku":"BWCS-DEX138NB-3","price":126.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DEX138NB-1.webp?v=1779580013"},{"product_id":"dell-latitude-13-7330-replacement-battery-1125v-3450mah-li-polymer","title":"Dell Latitude 13 7330 Replacement Battery 11.25V 01VX5","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDell Latitude 13 7330 \/ 7330 Rugged Extreme — 11.25V Li-Polymer Replacement Battery (01VX5)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 11.25V, 3450mAh (38.81Wh) lithium-polymer battery replaces the original cell in the Dell Latitude 13 7330 and Latitude 7330 Rugged Extreme. It matches OEM part numbers 01VX5, 293F1, and 404T8. Slot it in and the laptop powers on — no driver installs, no BIOS flags during boot.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eLatitude 7330 and 7330 Rugged Extreme fit:\u003c\/strong\u003e\n    Both variants share the same 11.25V three-cell architecture, connector pinout, and BMS handshake protocol — one cell covers both. The Rugged Extreme adds a hardened chassis but does not change the battery bay or management circuit.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge, discharge, and a full BIOS battery learn cycle on a Latitude 7330 unit. The BMS reported capacity correctly, the fuel gauge IC synced within two cycles, and no spurious health warnings appeared in Dell's battery diagnostics.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration on the 7330:\u003c\/strong\u003e\n    After fitting, run one full discharge to hibernate-cutoff then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap on this platform.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting poor battery health immediately after fitting a new cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Latitude 7330 BIOS reads health data stored in the outgoing cell's EEPROM and flags a mismatch when a new cell arrives with fresh EEPROM values. This is not a fault with the replacement — it is the firmware comparing old cycle-count data it no longer has. Run the battery learn cycle: discharge fully to hibernate, then charge to 100% without interruption. After one complete cycle the BIOS recalibrates and the warning clears.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLaptop shuts down at 20–30% shown on the fuel gauge\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge IC has not yet calibrated against the new cell's actual discharge curve. Under full CPU and display load, voltage drops faster than the old curve predicts, and the BMS triggers a protective shutdown before the gauge reaches zero. The fix is two or three full discharge-to-hibernate and recharge cycles — each one teaches the fuel gauge IC where the real voltage cliff sits. After calibration, shutdown should occur below 5% indicated charge.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409569841242,"sku":"BWCS-DET173NB-1","price":115.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409569874010,"sku":"BWCS-DET173NB-2","price":136.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409569906778,"sku":"BWCS-DET173NB-3","price":152.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DET173NB-1.webp?v=1779580060"},{"product_id":"dell-latitude-7330-rugged-replacement-battery-114v-4400mah-li-ion","title":"Dell Latitude 7330 Rugged Compatible Battery 11.4V 4400mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDell Latitude 7330 Rugged — 11.4V Li-ion Replacement Battery (XVJNP \/ 6JRCP)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 11.4V, 4400mAh (50.16Wh) lithium-ion replacement battery for the Dell Latitude 7330 Rugged and Latitude 5430 Rugged. Both are rugged-class notebooks used in field, industrial, and public safety environments where battery failure has real consequences. OEM part numbers XVJNP and 6JRCP cross-reference directly to this cell.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eLatitude 7330 and 5430 Rugged compatibility:\u003c\/strong\u003e\n    Dell uses the same 11.4V three-cell Li-ion architecture and connector pinout across both Rugged platforms. The BMS handshake uses identical EEPROM identifiers, so one replacement cell covers both 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 full charge and discharge on a Latitude 7330 Rugged. The BMS authenticated without fault codes, charge current stepped down correctly at the 80% threshold, and the cell reached 50.16Wh confirmed on a calibrated load tester.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration on Rugged Latitude units:\u003c\/strong\u003e\n    After fitting this battery, run the laptop down to hibernate cutoff under normal use — do not force-shutdown — then charge uninterrupted to 100%. This triggers Dell's BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting battery health as poor after fitting a new cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eDell's BIOS reads stored cycle count, health percentage, and rated Wh from EEPROM data embedded in the battery controller. A new cell ships with EEPROM values that don't yet match the BIOS's learned baseline for the old pack. This mismatch triggers a \"Battery Health is Poor\" or \"Consider Replacing\" warning even on a brand-new cell. Run one full discharge-to-hibernate and uninterrupted full charge cycle — the BIOS learn cycle overwrites the stale baseline and the warning clears.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLatitude shutting down at 20–30% shown on the fuel gauge\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis is a voltage cliff issue, not a capacity issue. Under combined CPU and display load, cell voltage drops faster than the fuel gauge IC can recalculate — the laptop hits the low-voltage cutoff before the displayed percentage reaches zero. The fuel gauge IC needs two to three full calibration cycles against the new cell before its discharge curve model is accurate. After three complete discharge-to-hibernate and full-charge cycles, the shutdown point should align with the gauge reading below 10%.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409570431066,"sku":"BWCS-DEL733NB-1","price":69.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409570463834,"sku":"BWCS-DEL733NB-2","price":81.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409570496602,"sku":"BWCS-DEL733NB-3","price":90.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DEL733NB-1.webp?v=1779580060"},{"product_id":"dell-inspiron-13-7577-replacement-battery-152v-3500mah-li-ion","title":"Dell Inspiron 13 7577 Replacement Battery 15.2V 3500mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDell Inspiron 13 7577 Series — 15.2V Li-ion Replacement Battery (4WN0Y)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 15.2V, 3500mAh (53.2Wh) Li-ion replacement battery for the Dell Inspiron 13 7577, 7779, 7778, and 7353. It fits directly in place of the original cell using OEM part numbers 4WN0Y, 9P3NW, G4MX4, JYFV9, and M245Y. If your current battery no longer holds a charge or Windows reports poor health, this is the direct cell swap.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eInspiron 13 7000 series compatibility:\u003c\/strong\u003e\n    The 7577, 7779, 7778, and 7353 share the same 15.2V four-cell architecture, connector pinout, and BMS handshake protocol — one cell covers the full group without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell on a 7577 board and confirmed the BMS completed a full charge cycle, reported correct voltage at each pin, and passed the Dell power adapter handshake without fault codes.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBIOS learn cycle after install:\u003c\/strong\u003e\n    After fitting this cell, run one full discharge to hibernate cutoff, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap on Inspiron 13 hardware.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLaptop shutting down at 20–30% remaining after battery swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge IC still holds calibration data from the old, degraded cell. The new cell has a steeper voltage curve than the worn one, so the system hits a voltage cliff earlier than the gauge expects and triggers an emergency shutdown. The fix is a full discharge cycle to hibernate cutoff — not just to 0% on the taskbar. After one complete uninterrupted discharge and recharge, the gauge IC recalibrates against the new cell's actual voltage curve and the shutdowns stop.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting battery health as poor immediately after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eDell's BIOS reads health data from EEPROM embedded in the battery pack. A new cell ships with factory EEPROM values that haven't been validated against the host system's charge history, so the BIOS flags it as unknown or degraded on first boot. This is not a fault with the cell. Run the BIOS battery learn cycle — one full discharge to hibernate cutoff followed by a full uninterrupted charge to 100% — and the BIOS will rewrite its health register based on the new cell's actual performance. Recheck under Dell SupportAssist or the BIOS hardware scan after one complete cycle.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409570594906,"sku":"BWCS-DEL173NB-1","price":64.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409570627674,"sku":"BWCS-DEL173NB-2","price":77.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409570660442,"sku":"BWCS-DEL173NB-3","price":85.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DEL173NB-1.webp?v=1779580060"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/collections\/Dell_Logo.png?v=1787154889","url":"https:\/\/batteryweb.com\/collections\/dell-replacement-batteries.oembed?page=5","provider":"BatteryWeb","version":"1.0","type":"link"}