Fosmon High Capacity 2850mAh Premium Extended Battery with Back Door for HP iPAQ hx2000 / hx2190 / hx2400 / hx2415 / hx2490 / hx2495 / hx2700 / hx2755 / hx2790 / hx2795 series High Quality, high capacity, light weight rechargeable DC 3.7V Li-Ion 2850mAh 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.