{"product_id":"samsung-galaxy-s-hercules-replacement-battery-37v-3400mah-li-ion","title":"Samsung Galaxy S Hercules EB-L1D7IBA Replacement Battery 3.7V 3400mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSamsung Galaxy S Hercules \/ SGH-T989 — 3.7V Li-ion Replacement Battery (EB-L1D7IBA)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 3400mAh Li-ion cell built to the EB-L1D7IBA specification for the Samsung Galaxy S Hercules, SGH-T989, and Galaxy S II X. It replaces a degraded or failed original battery and restores full power to the device. Capacity is rated at 12.58Wh.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSGH-T989 and Galaxy S II X compatibility:\u003c\/strong\u003e\n    All three models share the same battery bay dimensions, connector pinout, and BMS handshake protocol — the EB-L1D7IBA slot accepts this cell 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 full charge and discharge cycles on the SGH-T989. The BMS communicated correctly with the charge IC and the fuel gauge IC registered capacity without fault flags.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    On first installation, disable fast charging and run one complete discharge-charge cycle at standard rate. This lets the fuel gauge IC map its coulomb counter against the new cell's discharge curve before high-current charging begins on 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 SGH-T989\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe SGH-T989 modem and display together pull enough current to cause a voltage cliff on a cell whose internal resistance has climbed. When the cell voltage drops below approximately 3.4V under that combined load, the BMS trips the protection circuit before the OS registers 0%. This is not a software bug — it is the BMS doing its job on a worn cell. Replacing the cell with a fresh EB-L1D7IBA rated unit and running one full calibration cycle eliminates the premature cutoff.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePhone reports wrong percentage after cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe fuel gauge IC in the SGH-T989 stores a learned discharge curve from the previous cell. After swapping to a new cell, the IC applies that old curve to the new cell's voltage profile, producing percentage readings that jump or plateau incorrectly. The fix is one uninterrupted discharge from 100% down to automatic shutoff, followed by a full charge without interruption. After that single cycle, the coulomb counter resets its reference points to the new cell and percentage reporting stabilises.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43405021970522,"sku":"BWCS-SMT989FL-1","price":35.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43405022003290,"sku":"BWCS-SMT989FL-2","price":40.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43405022036058,"sku":"BWCS-SMT989FL-3","price":44.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SMT989FL-1.webp?v=1779369859","url":"https:\/\/batteryweb.com\/products\/samsung-galaxy-s-hercules-replacement-battery-37v-3400mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}