{"product_id":"zte-s302-replacement-battery-37v-1050mah-li-ion","title":"ZTE S302 Replacement Battery Li3710T42P3h553657 3.7V 1050mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eZTE S302 — 3.7V Li-ion Replacement Battery (Li3710T42P3h553657)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V Li-ion cell replaces the original battery in the ZTE S302 smartphone. It carries a capacity of 1050mAh (3.89Wh) and matches the OEM part number Li3710T42P3h553657. The physical dimensions — 55.42 × 35.01 × 5.41mm — match the S302 battery bay without modification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eS302 platform fit:\u003c\/strong\u003e\n    The S302 uses a slim single-cell Li-ion pack at 3.7V nominal. This cell replicates the connector pinout and BMS communication lines the phone's charge IC expects, so the device recognises the pack 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 under load representative of the S302's modem and display draw. The BMS held cutoff correctly at the low-voltage threshold and did not trip during simulated peak-current events.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    On first use after installation, disable fast charging and run one full discharge-charge cycle at standard rate. This lets the S302's fuel gauge IC map its coulomb counter against the new cell's discharge curve before any high-current protocol pushes current into an uncalibrated pack.\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 ZTE S302 after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe S302's fuel gauge IC stores a learned discharge curve from the old cell. When a new cell goes in, that curve no longer matches the actual voltage-vs-capacity profile of the replacement. At high-draw moments — active LTE, screen at full brightness — the new cell's terminal voltage drops below the IC's cutoff threshold while the displayed percentage still reads 20–30%. The phone interprets this as a hard undervoltage event and shuts down. One full slow-rate discharge-charge cycle forces the IC to relearn the curve, and the shutdowns stop.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eZTE S302 not powering on after the battery sat discharged in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells that drop below roughly 2.5V trigger a BMS protection lockout — the pack disconnects itself to prevent cell damage, and the phone sees no power rail at all. Plugging into a charger may show no response for several minutes while the charge IC trickle-charges the cell back above the BMS re-enable threshold. Leave the phone on charge with a known-good cable and adapter for at least 15–20 minutes before attempting to power on. Once the cell reaches approximately 3.0V, the BMS re-initialises and normal charging resumes.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43405005488218,"sku":"BWCS-ZTS302SL-1","price":22.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43405005520986,"sku":"BWCS-ZTS302SL-2","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43405005553754,"sku":"BWCS-ZTS302SL-3","price":27.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-ZTS302SL-1.webp?v=1779369820","url":"https:\/\/batteryweb.com\/products\/zte-s302-replacement-battery-37v-1050mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}