3000mAh Extended Battery fits HTC TyTN / O2 XDA Trion / Dopod 838 Pro / i-mate JASJAM / Qtek 9600 / MDA Vario II / Cingular 8525 / HTC Hermes / Orange SPV M3100 / Vodafone 1605 / Dopod CHT9000 series High Quality, high capacity, light weight rechargeable DC 3.7V Li-Ion 3000mAh battery. Longer battery life than the original battery that comes with the PDA. Best replacement for the original HTC TyTN / O2 XDA Trion / Dopod 838 Pro / i-mate JASJAM / Qtek 9600 / MDA Vario II / Cingular 8525 / HTC Hermes / Orange SPV M3100 / Vodafone 1605 / Dopod CHT9000 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.