{"product_id":"lenovo-thinkpad-x100e-2876-replacement-battery-111v-4400mah-li-ion","title":"Lenovo ThinkPad X100e 11.1V Replacement Battery 0A36278","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eLenovo ThinkPad X100e 2876 — 11.1V Li-ion Replacement Battery (0A36278)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 11.1V, 4400mAh (48.84Wh) Li-ion battery fits the Lenovo ThinkPad X100e series, including the 2876, 3506, and 3507 variants. It replaces the original cell when capacity has degraded or the pack no longer holds charge. Voltage and connector match the OEM spec — the BIOS recognises it as a known battery type on insertion.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eX100e series compatibility:\u003c\/strong\u003e\n    The 2876, 3506, and 3507 share the same 11.1V three-cell architecture and physical bay dimensions. All variants use the same connector pinout and BMS handshake protocol, so one cell fits the entire X100e line 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 ThinkPad X100e under sustained CPU and display load. The BMS held voltage above the 9.6V cutoff threshold through full discharge, and charge acceptance reached rated capacity without interruption.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-install calibration on the X100e:\u003c\/strong\u003e\n    After fitting the new cell, 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.\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 ThinkPad BIOS reads health data from the battery's EEPROM on every boot. When a new cell arrives, its EEPROM cycle count and learn data differ from the old pack, so the BIOS flags it as degraded before any calibration has run. This is not a fault with the cell — it is a mismatch between stored EEPROM history and actual cell state. Running one full discharge-to-hibernate followed by an uninterrupted charge to 100% rewrites the learn data and clears the warning on the next boot.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLaptop shutting down at 20–30% charge shown\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 maps percentage readings to the old cell's discharge profile, so it under-reports remaining capacity and the system hits the low-voltage shutdown threshold while the gauge still shows 20–30%. The fix is two to three full discharge-and-recharge cycles so the fuel gauge IC relearns the voltage-to-capacity curve of the new cell. After calibration, the displayed percentage and actual cutoff voltage align — target 10.8V or below at the point the laptop hibernates.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43410790547546,"sku":"BWCS-LVY650NB-1","price":100.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43410790580314,"sku":"BWCS-LVY650NB-2","price":115.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43410790613082,"sku":"BWCS-LVY650NB-3","price":124.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-LVY650NB-1.webp?v=1779581113","url":"https:\/\/batteryweb.com\/products\/lenovo-thinkpad-x100e-2876-replacement-battery-111v-4400mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}