{"product_id":"samsung-galaxy-alpha-replacement-battery-385v-1900mah-li-ion","title":"Samsung Galaxy Alpha EB-BG850BBE Replacement Battery 3.85V 1900mAh","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 1900mAh, 3.85V Li-ion replacement battery for the Samsung Galaxy Alpha, covering SM-G850, SM-G850F, SM-G850T, and related variants. It matches the OEM voltage, connector, and form factor of the original EB-BG850BBE cell. Swap it when the original no longer holds enough charge to get through a normal day.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSM-G850 series compatibility:\u003c\/strong\u003e\n    All SM-G850 variants share the same battery bay dimensions, 3.85V rail, and BMS connector pinout. That is why one cell covers the full lineup — the charge IC and fuel gauge IC expect identical cell parameters across every regional SKU.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through a full charge-discharge cycle on an SM-G850F. The BMS accepted the cell without error flags, the charge IC ramped to full current normally, and the fuel gauge completed its first calibration pass without erratic jumps.\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 gives the fuel gauge IC time to map the new cell's discharge curve before high-current charging pushes current into an uncalibrated cell — preventing false percentage readings from the start.\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 Galaxy Alpha after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe SM-G850 runs a Snapdragon 801 alongside an LTE modem — both pull hard simultaneously during calls or data bursts. A new cell with a slightly different internal resistance profile can hit a voltage dip under that combined load that the fuel gauge reads as a cliff-edge, triggering an emergency shutdown even though the displayed percentage looks safe. This is not a defective cell — it is the fuel gauge IC still calibrated to the old cell's discharge curve. Run one full discharge to below 5% and a full charge to 100% without interruption. After that cycle, the coulomb counter recalibrates and the shutdowns stop.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePhone will not power on after the replacement battery sat in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells self-discharge in storage, and if the cell drops below approximately 2.5V the BMS locks out to prevent damage — the phone shows nothing when you press power. Connect the original Samsung charger and leave it for 15–20 minutes before attempting to power on; the charge IC needs to trickle current into the cell to bring it above the BMS re-enable threshold. Do not use a fast charger for this recovery step — high current into a deeply discharged cell can trip the BMS again. Once the phone shows a charge indicator, let it reach at least 15% before booting.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43392039780442,"sku":"BWCS-SMG851XL-1","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43392039813210,"sku":"BWCS-SMG851XL-2","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43392039845978,"sku":"BWCS-SMG851XL-3","price":32.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SMG851XL-1.webp?v=1779143086","url":"https:\/\/batteryweb.com\/products\/samsung-galaxy-alpha-replacement-battery-385v-1900mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}