{"product_id":"lenovo-legion-5-15-replacement-battery-1544v-3900mah-li-polymer","title":"Lenovo Legion 5 15 15.44V Replacement Battery 5B10W86195","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eLenovo Legion 5 15 \/ Legion R7000 — 15.44V Li-Polymer Replacement Battery (5B10W86195)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 15.44V, 3900mAh (60.22Wh) Li-Polymer cell replaces the original battery in the Lenovo Legion 5 15, Legion 5 15IMH05H, Legion R7000, and Legion R7000 2020. It fits units using OEM part numbers 5B10W86195, L19C4PC0, L19L4PC0, L19M4PC0, L19SPC0, SB10W86190, and SB10W86191. Install it when the factory cell no longer holds a usable charge or fails to power the laptop at all.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eLegion 5 15 and R7000 platform fit:\u003c\/strong\u003e\n    Both the Legion 5 15IMH05H and R7000 2020 share the same 15.44V four-cell battery rail, connector pinout, and BMS handshake protocol — which is why a single part number covers the full range. Swapping a mismatched voltage cell here triggers an immediate BIOS charge-fault flag.\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 a Legion 5 15 unit. The BMS negotiated correctly with the EC firmware, charge current stepped down at the expected 80% threshold, and the protection circuit tripped cleanly at the low-voltage cutoff without nuisance trips under simulated CPU plus GPU load spikes.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration for Legion firmware:\u003c\/strong\u003e\n    After fitting this cell, 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 in Lenovo Vantage following 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 immediately after replacement\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Legion BIOS reads cycle count and health data stored in the old cell's EEPROM. A new cell ships with a fresh EEPROM — the firmware interprets the mismatch as a degraded or unknown battery and flags poor health in Lenovo Vantage. This is a firmware calibration issue, not a cell fault. Run the battery learn cycle: full discharge to hibernate shutdown, then a single uninterrupted charge to 100%. After one complete cycle the BIOS rewrites its reference data and the health warning clears.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLaptop shutting down at 20–30% charge shown on the gauge\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe fuel gauge IC calibrates its state-of-charge map against the old cell's discharge curve. On a new cell, the IC underestimates remaining capacity and triggers a low-voltage shutdown while the gauge still reads above 20%. This is not a faulty cell — it is the gauge IC losing accuracy at the voltage cliff before recalibration. Force two full discharge-to-hibernate cycles followed by full uninterrupted charges. After those cycles the gauge IC re-maps its curve against the new cell chemistry and the premature shutdown stops. Confirm the cell is holding above 14.8V under load before ruling out a cell issue.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409655365722,"sku":"BWCS-LVR700NB-1","price":65.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409655398490,"sku":"BWCS-LVR700NB-2","price":77.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409655431258,"sku":"BWCS-LVR700NB-3","price":86.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-LVR700NB-1.webp?v=1779580311","url":"https:\/\/batteryweb.com\/products\/lenovo-legion-5-15-replacement-battery-1544v-3900mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}