{"product_id":"att-sgh-i997-replacement-battery-37v-1850mah-li-ion","title":"EB555157VA AT\u0026T Infuse 4G SGH-i997 Replacement Battery 3.7V 1850mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAT\u0026amp;T Samsung Infuse 4G SGH-i997 — 3.7V Li-ion Replacement Battery (EB555157VA)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V 1850mAh Li-ion cell is a direct swap for the original EB555157VA battery in the Samsung Infuse 4G (SGH-i997). It fits the AT\u0026amp;T SGH-i997 smartphone and restores power capacity when the factory cell has aged out. Voltage and capacity match OEM spec at 3.7V and 1850mAh (6.85Wh).\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSGH-i997 fitment:\u003c\/strong\u003e\n    The Infuse 4G uses a specific 56.00 x 50.20 x 5.20mm cell bay with a dedicated connector pinout tied to the phone's charge IC and fuel gauge loop. This cell matches those physical and electrical parameters so the BMS handshake completes on first boot.\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 and load cycle on the SGH-i997 platform. The BMS accepted the charge IC handshake without fault codes, and the fuel gauge IC registered capacity correctly after one complete cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle fuel gauge reset:\u003c\/strong\u003e\n    After installation, disable fast charging and run one full discharge down to automatic shutdown, then charge uninterrupted to 100%. This gives the fuel gauge IC a clean reference curve to calibrate against the new cell before normal use.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the SGH-i997 reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Infuse 4G uses a coulomb counter in the fuel gauge IC that builds its percentage model from learned discharge curves of the old cell. When you install a new cell, the IC still references that stale curve. The result is percentage readings that lag reality — often showing 30–40% when the phone is close to cutoff voltage. One complete uninterrupted discharge-to-shutdown followed by a full charge resets the learning cycle. After that single calibration pass, percentage accuracy returns to normal.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on the replacement cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the modem or display draws a current spike the fuel gauge IC did not anticipate from the new cell's discharge curve. The cell voltage dips below the BMS cutoff threshold — typically around 3.0V — under load, even though the reported percentage looks safe. The phone cuts out to protect the cell, not because the cell is faulty. Run the calibration cycle described above; once the fuel gauge IC has mapped the new cell's actual voltage-to-capacity curve, the premature shutdowns stop.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43405013844058,"sku":"BWCS-SMI997ML-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43405013876826,"sku":"BWCS-SMI997ML-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43405013909594,"sku":"BWCS-SMI997ML-3","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SMI997ML-1.webp?v=1779369820","url":"https:\/\/batteryweb.com\/products\/att-sgh-i997-replacement-battery-37v-1850mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}