{"product_id":"sfr-starshine-replacement-battery-37v-1300mah-li-ion","title":"SFR Starshine 3.7V Li-ion Replacement Battery 1300mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSFR Starshine — 3.7V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1300mAh Li-ion cell for the SFR Starshine smartphone. It replaces the original battery when the cell has degraded and can no longer hold a usable charge. Dimensions are 54.00 x 43.00 x 5.00mm — confirm these against your existing cell before fitting.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSFR Starshine fit:\u003c\/strong\u003e\n    The Starshine uses a compact removable cell format at 3.7V nominal. This replacement matches that voltage rail and physical footprint, so the connector seats without modification and 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 cycled this cell through charge and discharge on the bench, confirmed BMS communication, and verified the protection circuit trips correctly at both the high and low voltage thresholds before shipment.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration tip:\u003c\/strong\u003e\n    On first use after installation, run one complete discharge down to auto-shutoff, then charge uninterrupted to 100% before resuming normal use. This gives the fuel gauge IC a full reference curve against the new cell and prevents erratic percentage readings in the first few days.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Starshine reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Starshine's fuel gauge IC builds its charge estimate from a stored discharge curve calibrated to the original cell. When you install a new cell, that stored curve no longer matches actual cell behaviour. The IC continues referencing old data, so the percentage shown can be 10–20% off in either direction. One full discharge-to-shutoff followed by a complete charge resets the reference point and brings the reported percentage back into 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 below the modem's or display's minimum rail voltage under load, even though the fuel gauge still reads a healthy percentage. The new cell's internal resistance under a real load causes a sharper voltage sag than the old degraded cell the IC was calibrated to. The BMS interprets this voltage cliff as a critical low and cuts output before the percentage reaches zero. Running one full calibration cycle as described above reduces the frequency of these premature cutoffs — the fuel gauge then tracks the actual cliff point of the new cell.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43404342067290,"sku":"BWCS-HU8160XL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43404342100058,"sku":"BWCS-HU8160XL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43404342132826,"sku":"BWCS-HU8160XL-3","price":28.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-HU8160XL-1.webp?v=1779369761","url":"https:\/\/batteryweb.com\/products\/sfr-starshine-replacement-battery-37v-1300mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}