Fosmon High Capacity 2400mAh Rechargeable Li-ion Battery fits ATT ATT Fuze High Quality, high capacity, light weight rechargeable DC 3.7V Li-Ion 2400mAh battery. Longer battery life than the original battery that comes with the device. No memory effect. Can be charged or discharged as needed without loss of capacity. Overcharge protection, with built-in battery life microchip. CE Certified with 6 months Manufacturer warranty.