{"product_id":"samsung-galaxy-grand-3-replacement-battery-37v-2200mah-li-ion","title":"Samsung Galaxy Grand 3 EB-BG720CBC 3.7V Replacement Battery","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSamsung Galaxy Grand 3 — 3.7V Li-ion Replacement Battery (EB-BG720CBC)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 2200mAh Li-ion replacement battery for the Samsung Galaxy Grand 3 and Grand 3 Duos smartphones. It fits SM-G720AX, SM-G7200, and related SM-G720 variants. Swap it in when the original cell no longer holds a charge or causes unexpected shutdowns.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSM-G720 series fitment:\u003c\/strong\u003e\n    The Grand 3 and Grand 3 Duos share the same battery bay geometry, connector pin-out, and BMS handshake requirements. Both single-SIM and Duos variants draw from the same 3.7V rail, so one cell covers the full SM-G720 lineup 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 SM-G7200 hardware. The BMS accepted the charge IC handshake on the first cycle, voltage held steady across screen-on and modem-active load states, and cutoff triggers fired within spec at both ends of the curve.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle fuel gauge recalibration:\u003c\/strong\u003e\n    On first use after installation, disable fast charging and run one complete discharge-charge cycle at standard current. This lets the fuel gauge IC map its coulomb counter against the new cell's actual discharge curve before high-current charging is applied to an uncalibrated cell.\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 replacement cell\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Grand 3's fuel gauge IC holds a discharge curve calibrated to the original cell. A new cell with a slightly different internal resistance profile hits a voltage cliff earlier under modem or display load than the IC expects. The phone reads 25% remaining but the cell voltage has already dropped below the safe-operation threshold. One full discharge-to-shutoff followed by an uninterrupted charge to 100% resets the coulomb counter and brings the percentage reading back into alignment with actual cell state.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eDevice not powering on after the battery sat in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells self-discharge in storage. If this battery was stored discharged for an extended period, the cell voltage may have fallen below 2.5V — the threshold at which the BMS latches into lockout to prevent damage. The phone will show no response to the power button and may not register on a charger immediately. Connect to a wall charger at 5V and leave it for 20–30 minutes; the charge IC will trickle current into the cell until the BMS re-initialises above 2.8V, after which normal charging resumes.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43404201656410,"sku":"BWCS-SMG720SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43404201689178,"sku":"BWCS-SMG720SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43404201721946,"sku":"BWCS-SMG720SL-3","price":28.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SMG720SL-1.webp?v=1779369370","url":"https:\/\/batteryweb.com\/products\/samsung-galaxy-grand-3-replacement-battery-37v-2200mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}