{"product_id":"vivo-s16-replacement-battery-389v-4500mah-li-polymer","title":"Vivo S16 B-X6 Compatible Battery 3.89V 4500mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eVivo S16 \/ V2244A — 3.89V Li-Polymer Replacement Battery (B-X6)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.89V, 4500mAh (17.51Wh) lithium-polymer replacement battery for the Vivo S16 and V2244A smartphones. It replaces OEM part number B-X6 and fits the same physical cavity and connector as the original cell. Capacity figures come from our product data, not estimates.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eS16 and V2244A compatibility:\u003c\/strong\u003e\n    Both the S16 and V2244A share the same mainboard platform, battery connector pinout, and BMS handshake protocol — that is why one cell covers both model numbers. Swapping between them does not change anything electrically.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge and discharge cycles on the S16 platform. The BMS accepted the cell without throwing a protection fault, and the charge IC communicated normally with the fuel gauge through the full cycle.\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 for one complete discharge-charge cycle. This lets the fuel gauge IC map the new cell's discharge curve before high-current fast charging pushes current into an uncalibrated state — skipping this step causes erratic percentage readings early on.\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 a replacement cell in the S16\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens because the fuel gauge IC is still calibrated to the old cell's voltage-discharge curve. When the new cell hits a voltage cliff — often around 3.5V under modem or display load — the phone cuts power before the gauge reaches 0%. The fix is one full uninterrupted discharge to shutdown followed by a full charge, which forces the coulomb counter to reset its endpoints against the new cell. After that cycle, low-percentage shutdowns typically stop.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eUSB fast charge not activating on the first cycle after installation\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eAfter a cell swap, the charge IC on the S16 can refuse to negotiate fast-charge protocols — including Vivo's FlashCharge — on the first charge cycle. This is a BMS initialisation behaviour: the IC defaults to standard 5V\/1A until it has completed one full cycle and confirmed the cell is within expected impedance range. Plug in via a standard charger for the first full charge, let it reach 100%, then switch back to your fast charger. Fast-charge rates restore after that initial cycle.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43391788089434,"sku":"BWCS-BKS160SL-1","price":40.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 2 Year","offer_id":43391788122202,"sku":"BWCS-BKS160SL-2","price":47.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 3 Year","offer_id":43391788154970,"sku":"BWCS-BKS160SL-3","price":52.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-BKS160SL-1.webp?v=1779142035","url":"https:\/\/batteryweb.com\/products\/vivo-s16-replacement-battery-389v-4500mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}