{"product_id":"ibm-thinkpad-x100e-2876-replacement-battery-111v-4400mah-li-ion","title":"IBM ThinkPad X100e 11.1V 4400mAh Replacement Battery 0A36278","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eIBM ThinkPad X100e Series — 11.1V Li-ion Replacement Battery (0A36278)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is an 11.1V, 4400mAh (48.84Wh) Li-ion replacement battery for the IBM ThinkPad X100e 2876, 3506, 3507, and related X100e models. It slots into the standard battery bay and connects through the same multi-pin interface as the original. Voltage and capacity match the OEM specification exactly.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eX100e platform compatibility:\u003c\/strong\u003e\n    The X100e 2876, 3506, and 3507 share an identical battery bay geometry, connector pinout, and BMS handshake protocol — one cell fits all three. The 11.1V rail feeds the same power management IC across every revision of this chassis.\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 X100e platform. The BMS negotiated correctly with the Lenovo EC firmware — no unknown device flags, no charge inhibit at initialisation.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration on the X100e:\u003c\/strong\u003e\n    After fitting this cell, run one full discharge to hibernate-cutoff, then charge uninterrupted to 100% without interruption. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after swapping cells 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 install\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe ThinkPad X100e stores battery health data in EEPROM on the original cell. When a new cell goes in, the EC reads stale EEPROM data from the old pack and flags the replacement as degraded. This is a firmware artefact — not a fault with the new cell. Running the battery learn cycle (full discharge to hibernate, uninterrupted charge to 100%) forces the EC to rewrite its health registers against the actual new cell chemistry. After one complete cycle, the health indicator resets.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLaptop shuts down at 20–30% charge shown on screen\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe fuel gauge IC on the X100e calibrates its state-of-charge model against the old cell's discharge curve. When a new cell goes in, the IC's internal model is misaligned — it reports 20–30% remaining at a point where the new cell's actual voltage has already crossed its minimum threshold under full CPU and display load. The laptop cuts out because real voltage drops below the EC's cutoff, not because charge actually remains. Two to three full discharge-and-charge calibration cycles bring the fuel gauge IC into alignment with the new cell and eliminate the early shutdown.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43410790711386,"sku":"BWCS-LVY650NB-1","price":100.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43410790744154,"sku":"BWCS-LVY650NB-2","price":115.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43410790776922,"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\/ibm-thinkpad-x100e-2876-replacement-battery-111v-4400mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}