1250mAh Battery fits Dopod 838 / Wiza100, HTC Wizard, I-Mate K-Jam / Jam, O2 XDA Mini Pro, Qtek 9100, MDA Vario series High Quality, high capacity, light weight rechargeable DC 3.7V Li-Ion 1250mAh battery. Longer battery life than the original battery that comes with the PDA. Best replacement for the original Dopod 838 / Wiza100, HTC Wizard, I-Mate K-Jam / Jam, O2 XDA Mini Pro, Qtek 9100, MDA Vario series battery pack. No memory effect. Can be charged or discharged as needed without loss of capacity. Overcharge protection, with built-in battery life microchip.