{"product_id":"samsung-sch-a930-replacement-battery-37v-850mah-li-ion","title":"Samsung SCH-A930 Replacement Battery 3.7V 850mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSamsung SCH-A930 \/ SPH-A960 Series — 3.7V Li-ion Replacement Battery (AB553446GABSTD)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V 850mAh Li-ion cell replacing the original battery in Samsung's early flip phone lineup. It fits the SCH-A930, SPH-A960, SCH-A990, and SPH-A640 among others. Voltage and physical dimensions match OEM spec — 49.50 × 33.80 × 4.70mm.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCross-model fit — SCH and SPH series:\u003c\/strong\u003e\n    These Samsung flip phones share the same battery footprint, connector orientation, and 3.7V single-cell architecture. The AB553446GA cell family was used across both CDMA variants, so one part number covers the full group 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 discharge and charge on the SCH-A930. The BMS accepted charge from a standard 5V source without tripping into protection mode, and the phone powered through startup without a low-voltage cutoff event.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    After installing a fresh cell, run one complete discharge down to automatic shutdown, then charge uninterrupted to 100% before normal use. The phone's fuel gauge IC was calibrated to the wear curve of the old cell — skipping this step causes erratic percentage readings from the first day.\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-A930 reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eSamsung's flip phone fuel gauge IC builds a discharge model based on how the installed cell behaves over repeated cycles. When you replace the cell, that internal model still reflects the old battery's degraded curve — not the new one. The gauge then misreads state-of-charge, often showing 100% for too long then dropping sharply. One full discharge-charge cycle forces the IC to relearn the new cell's actual voltage-to-capacity relationship and corrects the display.\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 fuel gauge IC still maps the old cell's steep voltage cliff onto the new cell. The phone reads 25% remaining but the uncalibrated gauge misses the actual cutoff threshold, and the processor shuts down to protect the cell. It is not a defective battery — it is a calibration mismatch. Force a full discharge to automatic shutdown, charge back to 100% without interruption, and the cutoff behaviour corrects itself. After that cycle, the gauge trips the shutdown closer to the true 3.0V per cell floor.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409455087706,"sku":"BWCS-SCH930SL-1","price":21.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409455120474,"sku":"BWCS-SCH930SL-2","price":24.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409455153242,"sku":"BWCS-SCH930SL-3","price":26.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SCH930SL-1.webp?v=1779579736","url":"https:\/\/batteryweb.com\/products\/samsung-sch-a930-replacement-battery-37v-850mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}