{"product_id":"myphone-next-replacement-battery-37v-2300mah-li-polymer","title":"MyPhone NEXT Li-Polymer Replacement Battery 3.7V 2300mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eMyPhone NEXT — 3.7V Li-Polymer Replacement Battery (NEXT)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 2300mAh Li-Polymer cell is a direct replacement for the original battery in the MyPhone NEXT smartphone. It restores power capacity when the original cell has degraded through charge cycles. Capacity is rated at 8.51Wh and dimensions are 71.50 × 58.53 × 4.60 mm.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMyPhone NEXT fit:\u003c\/strong\u003e\n    This cell matches the voltage rail and physical footprint of the MyPhone NEXT. The BMS communication protocol and connector pinout align with the original unit, so the phone's charge IC accepts the new cell 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 a full discharge and charge sequence on the bench. The BMS responded correctly at both the low-voltage cutoff and the charge termination threshold — no false shutdowns or abnormal charge termination during testing.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration after swap:\u003c\/strong\u003e\n    On first use after installing this cell, disable fast charging and run one complete discharge-charge cycle at standard rate. This lets the fuel gauge IC map its internal model against the new cell's actual discharge curve before high-current charging begins on an uncalibrated cell.\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 MyPhone NEXT after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe MyPhone NEXT uses a coulomb-counter fuel gauge that was calibrated against the original cell's discharge curve. After swapping to a new cell, the stored curve no longer matches reality. When the phone draws peak current — modem activity, screen brightness spikes — the new cell's voltage drops faster than the gauge predicts, and the system shuts down to protect the cell even though the reported percentage looks safe. One full discharge-charge cycle at standard charge rate resets the reference points. After calibration, the gauge tracks the new cell correctly and shutdowns at mid-range stop.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePhone feels warm near the battery during the first charge after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA new Li-Polymer cell comes from storage with higher internal impedance than a fully conditioned cell. On the first charge cycle, the charge IC pushes current into a cell that has not yet reached its rated low-impedance state, generating slightly more heat than normal. This is a one-cycle event — not a fault. If the phone stays warm past the second full charge, check that the charger output does not exceed the rated input voltage for the NEXT. Use a 5V standard charger for the first two cycles and measure the battery area temperature after each session.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43404153028698,"sku":"BWCS-GNN800SL-1","price":24.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43404153061466,"sku":"BWCS-GNN800SL-2","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43404153094234,"sku":"BWCS-GNN800SL-3","price":30.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-GNN800SL-1.webp?v=1779369080","url":"https:\/\/batteryweb.com\/products\/myphone-next-replacement-battery-37v-2300mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}