{"product_id":"lenovo-thinkpad-l13-yoga-gen-3intel21b5003miu-replacement-battery-1536v-2850mah-li-polymer","title":"Lenovo ThinkPad L13 Yoga Gen 3 Compatible Battery 15.36V 43.78Wh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eLenovo ThinkPad L13 Yoga Gen 3 \/ L13 Gen 3 \u0026amp; Gen 4 — 15.36V Li-Polymer Replacement Battery (5B10W51848)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 15.36V, 2850mAh (43.78Wh) Li-Polymer replacement battery for the Lenovo ThinkPad L13 Yoga Gen 3 (Intel), L13 Gen 3, and L13 Gen 4 series. It replaces OEM part numbers including 5B10W51848, L21C4PG1, L21D4PG1, L21M4PG1, SB10W51949, and related variants. The connector, BMS handshake protocol, and cell configuration match the original Lenovo specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eL13 Yoga Gen 3 \/ L13 Gen 3 and Gen 4 compatibility:\u003c\/strong\u003e\n    Intel and AMD variants across these generations share the same 15.36V four-cell Li-Polymer architecture and physical footprint. The BMS communication protocol is identical across the lineup, so one cell fits all covered models without firmware or connector differences.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this battery through full charge and discharge cycles on an L13 Gen 3 unit. The BMS handshake completed on first connection, charge current accepted at spec rate, and cell voltage held steady across varied CPU and display load states.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration on ThinkPad L13 series:\u003c\/strong\u003e\n    After fitting, discharge the laptop fully until it hibernates on its own, then charge uninterrupted to 100% without using the machine. This runs 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 fitting a new cell\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThinkPad BIOS reads health data from EEPROM stored on the battery's BMS board. When a new cell is installed, that EEPROM counter does not match what the BIOS expects from a fresh charge cycle, so it flags the battery as degraded even though the cell is new. This is not a fault with the replacement — it is a calibration mismatch. Run one full discharge-to-hibernate followed by an uninterrupted charge to 100%. After that cycle completes, the BIOS health reading will reset to reflect the actual cell state.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLaptop shuts down at 20–30% charge showing on screen\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge IC on the BMS still holds calibration data from the old, degraded cell. It maps the remaining charge curve inaccurately, calling a shutdown before the new cell is actually empty. Under combined CPU and display load the voltage sag looks steeper than the IC expects, triggering a premature cutoff. Run two to three full discharge-to-hibernate then full-charge cycles without interruption — after that the fuel gauge IC recalibrates against the new cell's actual voltage curve and the cutoff point moves back to the correct level near 3.0V per cell.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409546281050,"sku":"BWCS-LVL133NB-1","price":93.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409546313818,"sku":"BWCS-LVL133NB-2","price":111.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409546346586,"sku":"BWCS-LVL133NB-3","price":124.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-LVL133NB-1.webp?v=1779579986","url":"https:\/\/batteryweb.com\/products\/lenovo-thinkpad-l13-yoga-gen-3intel21b5003miu-replacement-battery-1536v-2850mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}