{"product_id":"jbl-e25bt-replacement-battery-37v-140mah-li-polymer","title":"JBL E25BT Replacement Battery 3.7V 140mAh GSP051230","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eJBL E25BT \/ T110BT — 3.7V Li-Polymer Replacement Battery (GSP051230)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 140mAh Li-Polymer cell that fits the JBL E25BT and T110BT wireless in-ear earbuds. It replaces the original GSP051230 cell inside a single earbud unit. Swap it in when the original cell has degraded and the earbud no longer holds a charge between uses.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eE25BT and T110BT compatibility:\u003c\/strong\u003e\n    Both models share the same internal cell footprint, connector pinout, and 3.7V nominal voltage rail. The GSP051230 cell fits either unit without modification to the BMS communication line.\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 E25BT hardware. The BMS accepted the new cell without fault codes, and the protection circuit engaged correctly at low-voltage cutoff.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle charge tip for E25BT:\u003c\/strong\u003e\n    After fitting, run a complete charge cycle before using the earbud. The onboard fuel gauge in the E25BT resets its calibration point on the first full charge — skipping this step causes the battery indicator to read inaccurately from day one.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the E25BT cuts out mid-audio on a new battery\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe E25BT combines Bluetooth radio draw and audio driver current in a very small housing. On a fresh cell sitting at storage voltage — typically around 3.6V — the combined draw during peak audio output can trip the BMS undervoltage protection even though the cell is not depleted. This is not a faulty cell. Run two or three full charge-discharge cycles and the BMS will stop triggering at storage voltage levels.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eEarbud shows full charge on the case but dies quickly after removal\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when a replacement cell arrives at shipping voltage and the charging case logs the charge state before the first full cycle completes. The case reads the surface charge — around 3.8–3.9V — and reports full. The actual usable capacity is lower until the cell has been cycled at least once from full charge to cutoff. Charge the earbud to 100% inside the case, use it until it powers off, then charge again. After that first complete cycle, the reported charge level will track actual capacity accurately.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43428156080218,"sku":"BWCS-PEX340SL-1","price":22.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43428156112986,"sku":"BWCS-PEX340SL-2","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43428156145754,"sku":"BWCS-PEX340SL-3","price":27.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-PEX340SL_1.webp?v=1779934278","url":"https:\/\/batteryweb.com\/products\/jbl-e25bt-replacement-battery-37v-140mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}