{"product_id":"t-mobile-v768-replacement-battery-37v-1500mah-li-ion","title":"T-Mobile V768 Replacement Battery 3.7V 1500mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eT-Mobile V768 \/ Concord — 3.7V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 1500mAh Li-ion battery replaces the original cell in the T-Mobile V768, V768C, and Concord smartphones. It fits the same physical bay — 49.00 x 47.80 x 5.50mm — and connects to the same charge IC that manages the original cell. Capacity figure is from the product specification, not extrapolated from web sources.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eV768, V768C, and Concord compatibility:\u003c\/strong\u003e\n    All three models share the same battery bay dimensions, connector pinout, and charge management IC. The BMS on this cell communicates with that same IC, so the device charges and discharges through its normal protection thresholds without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran charge and discharge cycles through the V768's charge IC and confirmed the BMS engages overvoltage protection at the correct threshold. Cell voltage held steady under screen-on and modem-active load without triggering early cutoff.\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 for one complete discharge-charge cycle. This lets the fuel gauge IC recalibrate its coulomb counter against the new cell's actual discharge curve before high-current charging pushes 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 V768 after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe V768's fuel gauge IC was calibrated to the old cell's voltage-versus-capacity curve. A new cell has a steeper voltage cliff at lower state-of-charge. When the phone hits that cliff under modem or display load, the cell voltage drops below the BMS cutoff faster than the OS expects. The phone reads 25% but the cell is already near its lower protection threshold. One full uninterrupted discharge down to automatic shutdown, followed by a full charge, resets the coulomb counter and eliminates this symptom.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBattery percentage jumping erratically in the first few days after replacement\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe fuel gauge IC on the V768 tracks capacity using a coulomb counter seeded with the old cell's parameters. After a cell swap, those parameters no longer match the physical cell, so reported percentage and actual state-of-charge diverge visibly. The counter recalibrates itself across full cycles — discharge to shutdown, charge to 100% without interruption. Two to three complete cycles stabilise the readout.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43404247531610,"sku":"BWCS-ZTU830XL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43404247564378,"sku":"BWCS-ZTU830XL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43404247597146,"sku":"BWCS-ZTU830XL-3","price":28.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-ZTU830XL-1.webp?v=1779369465","url":"https:\/\/batteryweb.com\/products\/t-mobile-v768-replacement-battery-37v-1500mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}