{"product_id":"lenovo-miix-700-replacement-battery-76v-5250mah-li-polymer","title":"Lenovo MIIX 700 L15C4P71 Compatible Battery 7.6V 5250mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eLenovo MIIX 700-12ISK — 7.6V Li-Polymer Replacement Battery (L15C4P71)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 7.6V, 5250mAh (39.9Wh) Li-Polymer battery that replaces part numbers L15C4P71 and L15L4P71. It fits the Lenovo MIIX 700 and MIIX 700-12ISK detachable 2-in-1, including the IdeaPad Miix 700-12ISK variants. Install it when the original cell no longer holds usable charge or fails to register with the BIOS.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMIIX 700 series compatibility:\u003c\/strong\u003e\n    The MIIX 700-12ISK and its sub-variants — including the 80QL0BRGE — share the same 7.6V voltage rail, connector pinout, and BMS handshake protocol. Both L15C4P71 and L15L4P71 are electrically identical; Lenovo used both part numbers 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 charge, full discharge to hibernate cutoff, and a second full charge cycle. The BMS communicated state-of-charge correctly to the OS fuel gauge IC by the second cycle, and charge termination triggered cleanly at 100% with no overrun.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap recalibration on the MIIX 700:\u003c\/strong\u003e\n    After fitting a new cell, run one complete discharge to hibernate cutoff — do not force shutdown — then charge uninterrupted to 100%. This resets the BIOS battery learn cycle. Skipping this step causes the health indicator to flag the new cell as degraded, which is an EEPROM calibration artefact, not a fault.\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 L15C4P71\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe MIIX 700 BIOS reads health data from EEPROM registers that were written by the original cell over its lifetime. When a new cell is installed, those registers haven't been updated yet, so the BIOS displays a health warning that has nothing to do with the new cell's condition. The fuel gauge IC needs at least one full discharge-to-recharge cycle to write fresh calibration data. After that cycle, the warning clears and reported capacity aligns with the actual 39.9Wh rating.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eMIIX 700 shutting down at 20–30% charge shown on screen\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the cell voltage drops below the load threshold before the OS fuel gauge reaches zero — a voltage cliff under combined CPU and display draw. The fuel gauge IC is predicting remaining charge based on stale calibration data from the previous cell. Run two full discharge-to-recharge cycles without interruption to let the IC recalculate the voltage-to-capacity curve for the new chemistry. After calibration, the shutoff point should align with the display reaching 0% at a cell voltage of approximately 6.0V.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409747017818,"sku":"BWCS-LVM700NB-1","price":104.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409747050586,"sku":"BWCS-LVM700NB-2","price":123.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409747083354,"sku":"BWCS-LVM700NB-3","price":137.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-LVM700NB-1.webp?v=1779580648","url":"https:\/\/batteryweb.com\/products\/lenovo-miix-700-replacement-battery-76v-5250mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}