{"product_id":"t-mobile-dash-replacement-battery-37v-2200mah-li-ion","title":"T-Mobile Dash EXCA160 Replacement Battery 3.7V 2200mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eT-Mobile Dash \/ MDA Mail — 3.7V Li-ion Replacement Battery (EXCA160)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 2200mAh Li-ion cell built to fit the T-Mobile Dash and MDA Mail smartphones. It replaces OEM part numbers EXCA160 and 35H00080-00M. The cell matches the original's connector, physical footprint (55.82 × 35.90 × 10.11mm), and BMS communication profile.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDash and MDA Mail fitment:\u003c\/strong\u003e\n    Both devices share the same battery bay dimensions, voltage rail, and BMS handshake protocol — one cell covers both platforms without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell on a Dash unit and confirmed the BMS accepted the new cell without a firmware lockout, held a stable charge curve, and passed the protection circuit's overvoltage and undervoltage cutoff thresholds correctly.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first install:\u003c\/strong\u003e\n    On first use after installation, disable fast charging and run one complete discharge-charge cycle. This lets the fuel gauge IC map the new cell's discharge curve before the charge IC pushes high current into 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 Dash after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Dash uses a coulomb-counting fuel gauge IC that retains the discharge curve from the old, degraded cell. When a new higher-capacity cell is installed, the IC's stored curve no longer matches actual cell voltage under load. At 20–30% reported charge, the new cell's real voltage under modem or screen load drops faster than the IC expects, triggering an emergency shutdown. One full discharge-charge cycle overwrites the old curve and resolves the cutoff. After calibration, the phone should read below 3.6V per cell before the first automatic shutdown.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePhone warm near the battery during the first charge after replacement\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eA new Li-ion cell arrives with higher internal impedance than a broken-in cell. During the first charge cycle, the charge IC pushes current into this higher-impedance cell, which generates more heat than normal at the battery contact area. This is not a fault — it reduces after one or two full cycles as the cell's impedance settles. If the device stays warm beyond the second full charge, check that the back cover is seated correctly and the cell contacts are clean and flush.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43405255704666,"sku":"BWCS-DC700XL-1","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43405255737434,"sku":"BWCS-DC700XL-2","price":30.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43405255770202,"sku":"BWCS-DC700XL-3","price":33.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DC700XL-1.webp?v=1779370350","url":"https:\/\/batteryweb.com\/products\/t-mobile-dash-replacement-battery-37v-2200mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}