2000mAh Battery fits HP iPAQ hx4000 / hx4700 / hx4705 / h4800 series High Quality, high capacity, light weight rechargeable DC 3.7V Li-Ion 2000mAh battery. Longer battery life than the original battery that comes with the PDA. Best replacement for the original HP iPaq hx4000 / hx4700 / hx4705 / h4800 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.