{"product_id":"lenovo-yoga-tablet-2-851f-replacement-battery-375v-6400mah-li-ion","title":"Lenovo Yoga Tablet 2-851F Compatible Battery L14C2K31 3.75V 6400mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eLenovo Yoga Tablet 2-851F \/ 830F Series — 3.75V Li-ion Replacement Battery (L14C2K31)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.75V, 6400mAh (24Wh) Li-ion battery for the Lenovo Yoga Tablet 2-851F, Yoga Tablet 2-830F, Yoga Tablet 2 L851F, and Yoga Tablet 2 830LC. It replaces OEM part numbers L14C2K31 and L14D2K31. Fit is confirmed across the 8-inch Android tablet range that shares this cell format and connector pinout.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eYoga Tablet 2 family compatibility:\u003c\/strong\u003e\n    The 851F, 830F, L851F, and 830LC variants share the same 3.75V single-cell architecture, connector pitch, and BMS handshake protocol — which is why one cell covers all four. The PCB protection circuit is identical across the run.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge and discharge on the Yoga Tablet 2 platform. The BMS accepted the cell without error flags, the fuel gauge IC initialised correctly, and charge current tapered normally at the top-of-charge threshold.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration for the Yoga Tablet 2:\u003c\/strong\u003e\n    After fitting this cell, run one full discharge until the tablet auto-shuts off, then charge uninterrupted to 100%. The fuel gauge IC on this tablet needs at least one full cycle against the new cell to reset its learned capacity model — skipping this leaves the percentage readout unreliable for the first week of use.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Yoga Tablet 2 reports poor battery health immediately after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Yoga Tablet 2 stores charge history and health data in EEPROM on the battery's protection circuit board. When you fit a new cell, that EEPROM is blank or carries factory default values the OS reads as degraded. Android's battery health indicator pulls from this stored data, not from a live measurement. Running one full discharge-to-shutoff followed by a full uninterrupted charge writes fresh cycle data to the fuel gauge IC and clears the erroneous health warning.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eTablet shuts down at 15–25% charge shown on screen\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge IC's state-of-charge map no longer matches the actual cell's voltage curve — common after a cell swap. The tablet hits the hardware low-voltage cutoff (around 3.0V under load) while the gauge still shows charge remaining. The fix is a calibration cycle: drain fully to auto-shutdown, leave for two minutes, then charge straight to 100% without interruption. After two to three of these cycles the percentage readout and the actual cutoff voltage align.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409558929498,"sku":"BWCS-LVF851NB-1","price":53.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409558962266,"sku":"BWCS-LVF851NB-2","price":63.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409558995034,"sku":"BWCS-LVF851NB-3","price":70.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-LVF851NB-1.webp?v=1779580029","url":"https:\/\/batteryweb.com\/products\/lenovo-yoga-tablet-2-851f-replacement-battery-375v-6400mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}