{"product_id":"lenovo-e31-replacement-battery-76v-4500mah-li-polymer","title":"Lenovo ThinkPad E31 7.6V Replacement Battery L14L2P22","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eLenovo E31-70 Series — 7.6V Li-Polymer Replacement Battery (L14L2P22)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 7.6V, 4500mAh Li-Polymer cell replaces the original L14L2P22 battery in Lenovo ThinkPad E31, E31-70, and E31-70-80KX0007GE notebooks. It matches the original voltage rail, connector pinout, and BMS communication protocol. Capacity is 4500mAh (34.2Wh), identical to the factory specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eE31 and E31-70 platform fit:\u003c\/strong\u003e\n    These models share the same battery bay dimensions, the same 7.6V charging circuit, and the same L14L2P22 BMS handshake. A cell that reports the wrong EEPROM data will trigger a health warning in the BIOS — this unit carries the correct identifiers for the E31 series.\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-load discharge, and BMS cutoff cycles on an E31-70 chassis. The BMS accepted the cell without fault codes, and the BIOS recognised the rated 34.2Wh without prompting a manual override.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install discharge cycle on the E31:\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 that appears after every cell swap on E31 series 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 poor battery health immediately after fitting the new cell\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe E31 BIOS reads health status from EEPROM data stored on the battery controller, not from live voltage alone. When a new cell is installed, the BIOS compares the fresh EEPROM against its learned discharge history from the old cell and flags a mismatch as poor health. This is not a fault with the replacement — it is a calibration gap. Run one full discharge to hibernate-cutoff followed by an uninterrupted charge to 100%, and the BIOS learn cycle will reset. After two to three full cycles, the health indicator should clear to normal.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eFuel gauge jumping erratically for the first few charges\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe E31's fuel gauge IC builds its capacity model from accumulated charge and discharge data. A new cell has no history in that model, so the IC estimates wildly until it has enough data points to recalibrate. This shows up as percentage jumps, sudden drops, or a gauge that reads 50% and then immediately triggers low-battery warnings. Run three complete charge-to-100% and discharge-to-hibernate cycles without interruption. By the third cycle, the fuel gauge IC will have enough data to track the new cell's actual voltage curve accurately.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409758847066,"sku":"BWCS-LVE310NB-1","price":61.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409758879834,"sku":"BWCS-LVE310NB-2","price":72.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409758912602,"sku":"BWCS-LVE310NB-3","price":80.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-LVE310NB-1.webp?v=1779580733","url":"https:\/\/batteryweb.com\/products\/lenovo-e31-replacement-battery-76v-4500mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}