{"product_id":"lenovo-legion-5-17ach6h-82jy00gmmx-replacement-battery-1536v-5000mah-li-polymer","title":"L20C4PC2 Lenovo Legion 5 17ACH6H Compatible Battery 15.36V 5000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eLenovo Legion 5 17ACH6H Series — 15.36V Li-Polymer Replacement Battery (L20C4PC2)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 15.36V, 5000mAh (76.8Wh) Li-Polymer replacement battery for the Lenovo Legion 5 17-inch gaming laptop. It fits the Legion 5 17ACH6H-82JY00GMMX and over 150 compatible Legion 5 variants across the ACH6, ITH6H, and related sub-series. OEM part numbers covered include L20C4PC2, L20M4PC2, L20L4PC2, L20D4PC2, SB11B53887, and SSB11B53884.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eLegion 5 17-inch platform fit:\u003c\/strong\u003e\n    The ACH6H, ACH6, and ITH6H sub-series all share the same 15.36V four-cell battery architecture, connector pinout, and BMS handshake protocol — which is why one part number family covers all of them. Swapping between sub-variants does not affect BMS communication.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through full charge and discharge cycles on Legion 5 hardware. The BMS negotiated correctly, charge current stepped down properly at 95%, and there was no fault flag at the EC level during load transitions from idle to full CPU and GPU draw.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration cycle:\u003c\/strong\u003e\n    After fitting, run the laptop on battery until it hibernates at the low-voltage cutoff, then charge uninterrupted to 100% without using the machine. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after 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 poor battery health immediately after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLenovo's BIOS reads health data from EEPROM embedded in the battery pack — not from live cell measurements. When a new cell arrives, that EEPROM data does not match the charge history the BIOS expects to see, so it flags the battery as degraded or unknown. This is a data mismatch, not a fault with the replacement cell. Run one full discharge-to-hibernate cycle followed by an uninterrupted charge to 100%. After one or two complete cycles the BIOS learn cycle re-establishes baseline data and the health warning clears.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLaptop shuts off at 20–30% charge shown on screen\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge IC has not yet calibrated against the new cell's actual voltage curve. The OS is reading a fuel map built from the old, degraded cell — so it thinks 25% remaining is safe when the new cell is already near its real low-voltage threshold under load. Under full CPU plus display draw on the Legion 5, voltage sag on a miscalibrated gauge hits the EC cutoff before the reported percentage reaches zero. Fix this by completing two full discharge-to-hibernate cycles followed by full charges — recalibrates the fuel gauge IC against the actual cell chemistry and the premature shutdowns stop.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409572692058,"sku":"BWCS-LVL517NB-1","price":96.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409572724826,"sku":"BWCS-LVL517NB-2","price":112.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409572757594,"sku":"BWCS-LVL517NB-3","price":125.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-LVL517NB-1.webp?v=1779580060","url":"https:\/\/batteryweb.com\/products\/lenovo-legion-5-17ach6h-82jy00gmmx-replacement-battery-1536v-5000mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}