{"product_id":"samsung-galaxy-grand-3-replacement-battery-38v-2200mah-li-ion","title":"Samsung Galaxy Grand 3 EB-BG720CBC Replacement Battery 3.8V 2200mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSamsung Galaxy Grand 3 \/ SM-G7200 — 3.8V Li-ion Replacement Battery (EB-BG720CBC)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.8V, 2200mAh Li-ion replacement battery for the Samsung Galaxy Grand 3 and Galaxy Grand 3 Duos. It fits SM-G720AX, SM-G7200, and related variants. It slots into the same compartment as the original EB-BG720CBC and EB-BG720CBK cells.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eGrand 3 and Grand 3 Duos platform fit:\u003c\/strong\u003e\n    Both single-SIM and Duos variants run the same 3.8V battery rail with identical connector pinout and BMS handshake — one cell covers the entire SM-G720 range without modification.\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 an SM-G7200 unit. The BMS accepted charge without interruption, voltage held steady under display and modem load, and no thermal events occurred at the charge IC.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    Disable fast charging for the first full discharge-charge cycle after installation. This gives the fuel gauge IC time to map the new cell's discharge curve before high-current charging pushes into an uncalibrated profile.\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 Grand 3 after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Grand 3's fuel gauge IC still holds the discharge curve from the old, degraded cell. When the new cell's voltage drops below that stale curve at 20–30% reported charge, the IC signals a shutdown before the cell is actually depleted. This is a calibration mismatch, not a faulty replacement. Run one full uninterrupted discharge to automatic shutoff, then charge to 100% without interruption — the coulomb counter resets against the new cell's actual capacity and the phantom shutoffs stop.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eOS reporting wrong battery percentage after installation\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eSamsung's fuel gauge IC on the SM-G720 platform uses a stored charge curve to estimate remaining capacity. Swapping the physical cell doesn't reset that curve — the IC keeps comparing live voltage against data built on a different cell's behaviour. Reported percentage can jump, plateau, or read 100% while the phone is clearly draining. One complete discharge-to-shutoff followed by a full uninterrupted charge cycle forces the IC to recalibrate its coulomb counter against the replacement cell's actual curve.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43404196773978,"sku":"BWCS-SMG720XL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43404196806746,"sku":"BWCS-SMG720XL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43404196839514,"sku":"BWCS-SMG720XL-3","price":28.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SMG720XL-1.webp?v=1779369370","url":"https:\/\/batteryweb.com\/products\/samsung-galaxy-grand-3-replacement-battery-38v-2200mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}