{"product_id":"bbk-vivo-y55-replacement-battery-385v-2700mah-li-polymer","title":"BBK VIVO Y55 Replacement Battery B-B1 3.85V 2700mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eBBK VIVO Y55 Series — 3.85V Li-Polymer Replacement Battery (B-B1)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThe B-B1 is a 3.85V, 2700mAh (10.4Wh) lithium-polymer cell that fits the VIVO Y55, Y55A, and Y55L smartphones. It slots into the same footprint as the factory cell at 83.10 × 61.20 × 3.20 mm. Use this when the original battery no longer holds charge or causes unexpected shutdowns.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eY55, Y55A, Y55L compatibility:\u003c\/strong\u003e\n    All three models share the same internal battery bay dimensions, connector pinout, and BMS handshake protocol — one cell covers the full platform without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled the B-B1 through full discharge and recharge on a Y55 unit. The BMS accepted the cell on first insertion, charge current ramped correctly, and the protection circuit triggered cleanly at the low-voltage cutoff threshold.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle fast-charge hold:\u003c\/strong\u003e\n    After installation, disable fast charging and run one complete discharge-charge cycle at standard rate. This gives the fuel gauge IC time to map the new cell's discharge curve before high-current charging pushes current into an uncalibrated cell.\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 Y55 after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe VIVO Y55 fuel gauge IC holds a learned discharge curve from the original cell. A new cell with a different internal resistance profile hits a voltage cliff earlier than the IC expects, cutting power before the displayed percentage reaches zero. This is a calibration gap, not a faulty battery. Run two full discharge-charge cycles at standard charge rate and the coulomb counter will converge on the new cell's actual curve.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePhone won't power on after the B-B1 sat in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-polymer cells stored below 2.5V trigger a BMS lockout that blocks normal boot. The VIVO Y55 charge IC cannot start if the cell voltage is too low to power the protection circuit. Connect the phone to a wall charger — not a PC USB port — and leave it for 15–20 minutes without attempting to power on. Once the cell climbs above approximately 3.0V, the BMS releases and the phone will boot normally.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43392073597018,"sku":"BWCS-BKY550SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43392073629786,"sku":"BWCS-BKY550SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43392073662554,"sku":"BWCS-BKY550SL-3","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-BKY550SL-1.webp?v=1779143620","url":"https:\/\/batteryweb.com\/products\/bbk-vivo-y55-replacement-battery-385v-2700mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}