{"product_id":"samsung-sch-a570-replacement-battery-37v-1000mah-li-ion","title":"Samsung SCH-A570 Replacement Battery BST383ADA 3.7V 1000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSamsung SCH-A570 — 3.7V Li-ion Replacement Battery (BST383ADA)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThe BST383ADA is a 3.7V, 1000mAh Li-ion cell that fits the Samsung SCH-A570 mobile phone. It restores power to the handset when the original cell no longer holds a usable charge. Capacity is 3.7Wh, matching the original specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSCH-A570 fit:\u003c\/strong\u003e\n    This cell matches the voltage rail, physical form factor, and connector orientation the SCH-A570 requires. The BMS handshake on this phone expects a 3.7V nominal cell — a mismatched voltage causes the device to reject the battery entirely or report erratic percentages from the first boot.\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 SCH-A570 platform and monitored BMS response at each stage. The protection circuit held cutoff correctly at the low-voltage threshold, and the charge IC accepted the cell without fault flags.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration after swap:\u003c\/strong\u003e\n    On first use, disable any power-saving shortcuts and run one complete discharge down to automatic shutoff, then charge uninterrupted to 100%. This gives the fuel gauge IC one full reference cycle against the new cell's discharge curve before it starts reporting accurate percentages.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the SCH-A570 reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe SCH-A570 uses a fuel gauge IC that builds its percentage estimate from a stored discharge curve tied to the original cell. When a new cell goes in, that stored curve no longer matches the actual voltage-to-capacity relationship of the replacement. The gauge reads voltage correctly but maps it to the wrong percentage point on the old curve. One full discharge-to-shutoff and uninterrupted recharge resets the reference and brings the displayed percentage 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 — calls, backlight, and radio transmit all pull current simultaneously, and a cell that hasn't been calibrated yet hits the BMS low-voltage cutoff before the display percentage catches up. The phone reads 25% but the cell is already below the 3.0V protection threshold under that combined load. It isn't a faulty cell — it's an uncalibrated gauge mapping charge state incorrectly. Run one complete cycle as described above; after calibration, the shutoff will align with the displayed percentage.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409458397274,"sku":"BWCS-SCH570SL-1","price":22.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 2 Year","offer_id":43409458430042,"sku":"BWCS-SCH570SL-2","price":25.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 3 Year","offer_id":43409458462810,"sku":"BWCS-SCH570SL-3","price":27.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SCH570SL-big.webp?v=1779579767","url":"https:\/\/batteryweb.com\/products\/samsung-sch-a570-replacement-battery-37v-1000mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}