{"product_id":"samsung-galaxy-s8-plus-replacement-battery-385v-3500mah-li-polymer","title":"Samsung Galaxy S8 Plus EB-BG955ABE Replacement Battery 3.85V","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSamsung Galaxy S8 Plus — 3.85V Li-Polymer Replacement Battery (EB-BG955ABE)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.85V, 3500mAh Li-Polymer battery replaces the original EB-BG955ABE cell in the Samsung Galaxy S8 Plus. It fits the Galaxy S8 Plus, Galaxy S8 Plus TD-LTE, Dream 2, and SM-G955F among other listed variants. Capacity figures come from the product data — 13.48Wh at rated voltage.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eS8 Plus variant compatibility:\u003c\/strong\u003e\n    The SM-G955 lineup shares a common battery bay geometry, connector pinout, and BMS handshake protocol across regional variants including TD-LTE and Dream 2. One cell design covers all listed models because Samsung locked the same power rail and NTC thermistor arrangement across the series.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell on an SM-G955F through charge initiation, fast-charge handshake, and thermal monitoring. The BMS accepted charge current without fault flags, and the NTC thermistor reported within spec throughout the 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 and run one full discharge-to-charge cycle. This lets the fuel gauge IC map the new cell's discharge curve before the charge IC pushes high current into an uncalibrated cell — skipping this step is the leading cause of erratic percentage readings after a swap.\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 S8 Plus after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe S8 Plus uses a coulomb counter combined with a voltage-based lookup table stored in the fuel gauge IC. When a new cell goes in, that table is still calibrated to the old cell's internal resistance profile. Under high-current loads — active LTE, Bluetooth, and a bright display simultaneously — the new cell's voltage can dip below the shutdown threshold even while the gauge still reads 20–30%. The fix is one complete uninterrupted discharge from 100% to automatic power-off, followed by a full charge without interruption. After that cycle, the fuel gauge IC resets its reference points against the actual cell curve and the premature shutdowns stop.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eUSB-PD fast charge not activating on the first cycle after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eSamsung's Adaptive Fast Charging protocol requires a BMS handshake before the charge IC ramps current above the standard 5V\/1A baseline. On a freshly installed cell, the BMS sometimes withholds that handshake until it has completed one baseline charge cycle and confirmed cell integrity. This is not a fault — it is a protection state. Charge the phone once at standard speed using the original Samsung charger, allow it to reach 100%, then unplug and replug. On the second connection, the fast-charge handshake completes and the charger steps up to 9V\/1.67A as normal.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43392075956314,"sku":"BWCS-SMG955XL-1","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43392075989082,"sku":"BWCS-SMG955XL-2","price":28.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43392076021850,"sku":"BWCS-SMG955XL-3","price":31.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SMG955XL-1.webp?v=1779143639","url":"https:\/\/batteryweb.com\/products\/samsung-galaxy-s8-plus-replacement-battery-385v-3500mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}