{"product_id":"samsung-galaxy-alpha-replacement-battery-385v-1700mah-li-ion","title":"Samsung Galaxy Alpha EB-BG850BBE Replacement Battery 3.85V 1700mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSamsung Galaxy Alpha SM-G850 Series — 3.85V Li-ion Replacement Battery (EB-BG850BBE)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.85V, 1700mAh Li-ion replacement cell for the Samsung Galaxy Alpha smartphone. It fits the SM-G850, SM-G850F, SM-G850T, and related variants that shipped with the original EB-BG850BBE or equivalent OEM part numbers. Install it when the original cell no longer holds a usable charge across a normal day of calls, browsing, and standby.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSM-G850 platform fit:\u003c\/strong\u003e\n    The Galaxy Alpha's compact chassis uses a narrow connector pitch and a BMS handshake tied to Samsung's fuel gauge IC. All SM-G850 variants share the same voltage rail and physical cell footprint — 85.88 × 38.68 × 4.40mm — so one cell covers the full model range.\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-G850F and confirmed the BMS accepted charge handshake on first connection. The fuel gauge IC registered the new cell and began coulomb counting without requiring a manual reset.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle fast charge protocol:\u003c\/strong\u003e\n    On first use after installation, disable fast charging and run one full discharge-to-charge cycle at standard rate. This lets the fuel gauge IC map the new cell's discharge curve before high-current charging begins pushing into an uncalibrated state.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Galaxy Alpha reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Galaxy Alpha uses a coulomb-counting fuel gauge IC that builds its reference model from the original cell's discharge curve over hundreds of cycles. When a new cell goes in, the IC is still referencing the old degraded curve. This mismatch causes the percentage display to read high or low until the IC relearns the new cell. One full discharge from 100% to automatic shutdown, followed by an uninterrupted charge to 100%, forces the IC to recalibrate. After that cycle, percentage readouts stabilise.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% charge remaining on the replacement cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the modem or display draws a short burst of high current and the cell voltage drops below the BMS cutoff threshold — even though the gauge still shows charge remaining. On a freshly installed cell with an uncalibrated fuel gauge, the displayed percentage and the actual state of charge can diverge by 15–25%. The fix is the same recalibration cycle: drain the phone to zero under normal use, let it shut down on its own, then charge to 100% without interruption. After one clean cycle the gauge aligns to the new cell and the early shutdowns stop.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43404233867354,"sku":"BWCS-SMG850SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43404233900122,"sku":"BWCS-SMG850SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43404233932890,"sku":"BWCS-SMG850SL-3","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SMG850SL-1.webp?v=1779369465","url":"https:\/\/batteryweb.com\/products\/samsung-galaxy-alpha-replacement-battery-385v-1700mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}