{"product_id":"lenovo-thinkpad-p16s-gen-1intel21bt008cra-replacement-battery-1548v-3250mah-li-polymer","title":"Lenovo ThinkPad P16s Replacement Battery 15.48V 5B10W51869","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eLenovo ThinkPad P16s \/ T16 Gen 1 \u0026amp; 2 — 15.48V Li-Polymer Replacement Battery (5B10W51869 \/ L21M4P73)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 15.48V, 3250mAh (50.31Wh) Li-Polymer cell replaces the original battery in the Lenovo ThinkPad P16s Gen 1 (Intel and AMD) and ThinkPad T16 Gen 2 (AMD) series, along with 119 additional verified models. It uses OEM part numbers 5B10W51869, L21M4P73, and SB10W51970. Voltage and connector pinout match the factory spec exactly.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eThinkPad P16s and T16 Gen 2 platform fit:\u003c\/strong\u003e\n    These models share a common 15.48V four-cell Li-Polymer architecture with the same BMS handshake protocol and SmartBattery connector. One cell covers both the Intel and AMD board variants without any firmware conflict.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell on a ThinkPad T16 Gen 2 under sustained CPU and display load. The BMS held voltage above the 14V cutoff threshold throughout the draw cycle, and the charge IC accepted a full 0–100% charge without interruption.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration on ThinkPad 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 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\"\u003eWhy the ThinkPad P16s shuts down at 20–30% after a battery swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe BIOS fuel gauge IC calibrates its low-voltage cutoff map against data stored from the previous cell. After a swap, that map is stale — it predicts a voltage cliff at a state-of-charge that no longer matches the new cell's discharge curve. The laptop interprets a moderate draw spike from the CPU or dGPU as an imminent collapse and triggers an emergency shutdown. Running two or three full discharge-to-hibernate cycles forces the fuel gauge IC to rebuild its internal model against the new cell's actual chemistry. After calibration, the reported percentage and the real cutoff point realign.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting battery health as \"Poor\" or \"Replace Soon\" on a brand-new cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe ThinkPad BIOS reads health status from EEPROM registers that carry over cycle count and wear data from the old cell's embedded controller — not from the physical chemistry of the new one. A fresh cell installed without a learn cycle will inherit the previous battery's degraded health tag. Open Lenovo Vantage, navigate to Power → Battery Settings, and run the Battery Gauge Reset function. If Vantage is unavailable, enter the BIOS power menu and trigger the discharge-reset cycle manually — after one complete discharge and recharge, the health flag clears and reads correctly.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409548836954,"sku":"BWCS-LVP162NB-1","price":98.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409548869722,"sku":"BWCS-LVP162NB-2","price":116.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409548902490,"sku":"BWCS-LVP162NB-3","price":129.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-LVP162NB-1.webp?v=1779579986","url":"https:\/\/batteryweb.com\/products\/lenovo-thinkpad-p16s-gen-1intel21bt008cra-replacement-battery-1548v-3250mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}