{"product_id":"ntt-docomo-galaxy-s-replacement-battery-37v-1550mah-li-ion","title":"SC-02B Compatible Battery 3.7V 1550mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eNTT DoCoMo Galaxy S (SC-02B) — 3.7V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1550mAh Li-ion replacement battery for the Samsung Galaxy S SC-02B, the NTT DoCoMo variant sold in Japan. It fits the original 2010 SC-02B handset and restores power capacity when the original cell has degraded. Dimensions are 51.00 × 50.50 × 5.50mm — confirm these against your existing battery before installing.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSC-02B platform fit:\u003c\/strong\u003e\n    The SC-02B shares Samsung's original Galaxy S battery bay and connector pinout. This cell matches that footprint and voltage rail, so the phone's charge IC can communicate with the BMS without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through full charge and discharge on the SC-02B platform. The BMS responded correctly to the charge IC — no false cutoff, no thermal event at standard 1A input.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration after swap:\u003c\/strong\u003e\n    On first use, let the battery drain fully to auto-shutdown, then charge uninterrupted to 100% before use. This gives the SC-02B's fuel gauge IC one clean reference cycle against the new cell's actual discharge curve.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the SC-02B reports wrong percentage after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe SC-02B uses a coulomb counter that calibrates against the original cell's discharge curve stored in memory. A new cell has a different internal resistance profile, so the counter's stored reference is immediately out of sync. The phone may show 30% when the cell is actually near empty, or report 100% well before charging completes. One full discharge-to-shutdown followed by an uninterrupted charge to 100% resets the reference and brings percentage reporting back in line.\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 cell voltage drops sharply under load — typically when the modem fires at full power or the display peaks brightness — even though the fuel gauge still shows charge remaining. The SC-02B's BMS triggers a hard cutoff the moment cell voltage falls below its minimum threshold, regardless of what percentage the OS is displaying. It is a voltage cliff, not a capacity problem. After one full recalibration cycle, the fuel gauge catches up to the real voltage curve and early shutdowns stop occurring.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43405089275994,"sku":"BWCS-SMG900ML-1","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43405089308762,"sku":"BWCS-SMG900ML-2","price":31.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43405089341530,"sku":"BWCS-SMG900ML-3","price":33.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SMG900ML-1.webp?v=1779369969","url":"https:\/\/batteryweb.com\/products\/ntt-docomo-galaxy-s-replacement-battery-37v-1550mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}