{"product_id":"bbk-vivo-y51-replacement-battery-38v-2300mah-li-polymer","title":"BBK Vivo Y51 B-95 Replacement Battery 3.8V 2300mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eBBK Vivo Y51 Series — 3.8V Li-Polymer Replacement Battery (B-95)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.8V, 2300mAh (8.74Wh) lithium-polymer cell built to replace the original B-95 battery in the Vivo Y51 family. It fits the Vivo Y51, Y51 TD-LTE, Y51 Dual SIM, and Y51A. When the factory cell degrades and can no longer hold voltage under screen or modem load, this is the direct swap.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eY51 variant coverage:\u003c\/strong\u003e\n    The TD-LTE, Dual SIM, and Y51A share the same physical battery bay dimensions and BMS handshake protocol as the base Y51 — same connector, same 3.8V nominal rail. One part number covers the full variant group.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran the B-95 replacement through charge, discharge, and modem-load cycles. The BMS accepted charge from the Vivo charge IC without fault flags and held voltage above the modem-cutoff threshold through a full discharge curve.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    On first use after installation, disable fast charging and run one complete discharge-charge cycle at standard current. This lets the fuel gauge IC map the new cell's discharge curve before fast charge pushes higher current into an uncalibrated coulomb counter.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on the Vivo Y51 after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Y51's fuel gauge IC was calibrated to the original cell's internal resistance profile. A new cell has lower impedance, which shifts the voltage-to-percentage mapping. Under high-draw moments — screen at full brightness, active 4G modem, GPS — the SoC reads 25% but the cell voltage drops sharply below the hardware shutdown threshold. The phone cuts out even though the displayed percentage looks safe. One full discharge down to automatic power-off followed by a full charge resets the coulomb counter and eliminates most of these early shutdowns.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eVivo Y51 not powering on after the replacement battery sat in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLithium-polymer cells self-discharge in storage. If the cell dropped below approximately 2.5V per cell, the BMS enters lockout to prevent damage and will not pass current to the phone even when a charger is connected. Plug in a known-working Vivo-compatible charger and leave it connected for 15–20 minutes without pressing the power button — the charge IC trickle-charges the cell back above the BMS re-enable threshold. Once the phone shows a charging indicator, proceed with a normal full charge before first use.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43392108298330,"sku":"BWCS-BKY510SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43392108331098,"sku":"BWCS-BKY510SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43392108363866,"sku":"BWCS-BKY510SL-3","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-BKY510SL-1.webp?v=1779143796","url":"https:\/\/batteryweb.com\/products\/bbk-vivo-y51-replacement-battery-38v-2300mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}