{"product_id":"lenovo-erazer-y50-replacement-battery-74v-7200mah-li-ion","title":"Lenovo Erazer Y50 L13M4P02 Compatible Battery 7.4V 7200mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eLenovo Erazer Y50 Series — 7.4V Li-ion Replacement Battery (L13M4P02)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 7.4V, 7200mAh (53.28Wh) Li-ion battery for the Lenovo Erazer Y50, Y50-70, Y50-70AM-IFI, Y50-70AS-ISE, and over 29 additional Y50 variants. It replaces OEM parts L13M4P02, 5B10K10190, and L13N4P01. Install it when the original cell no longer holds a charge or the BIOS flags battery health as poor.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eY50 series compatibility:\u003c\/strong\u003e\n    All Y50 and Y50-70 variants share the same 7.4V two-cell battery bay, connector pinout, and BMS handshake protocol — one cell fits the full line without wiring adapters or firmware changes.\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 a Y50-70 unit. The BMS communicated correctly with the EC, charge termination triggered at the expected voltage, and no overcurrent flags were thrown during a sustained CPU-plus-display load test.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle calibration on the Y50:\u003c\/strong\u003e\n    After installation, run one full discharge until the laptop hibernates, then charge uninterrupted to 100%. This forces the fuel gauge IC to recalibrate against the new cell's actual capacity and clears the inaccurate health warning the BIOS displays 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 battery health as poor after swapping the Y50 cell\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Y50's embedded controller reads health data stored in the old cell's EEPROM and compares it against the new cell's reported state-of-charge. A fresh cell with no charge history looks degraded by that metric. This is not a fault with the replacement cell — it is a calibration gap. Running one full discharge-to-hibernate followed by an uninterrupted charge to 100% resets the BIOS battery learn cycle. After two to three full cycles, the health indicator returns to normal.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eY50 shutting down at 20–30% charge shown on screen\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the cell cannot sustain voltage under combined CPU and display load — voltage drops below the EC's cutoff threshold before the fuel gauge reads zero. It is a voltage cliff, not a calibration issue. The fuel gauge IC has learned the old cell's discharge curve and is predicting capacity incorrectly. Run three full discharge-to-hibernate cycles to let the gauge IC map the new cell's actual voltage curve; the shutdowns stop once the curve is correctly learned down to approximately 3.0V per cell.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409757077594,"sku":"BWCS-LVY500NB-1","price":115.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409757110362,"sku":"BWCS-LVY500NB-2","price":131.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409757143130,"sku":"BWCS-LVY500NB-3","price":145.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-LVY500NB-1.webp?v=1779580734","url":"https:\/\/batteryweb.com\/products\/lenovo-erazer-y50-replacement-battery-74v-7200mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}