The High Capacity Lithium Ion Rechargeable Battery pack provides3300 mAh of capacity at 3.7 volts. The 3300 mAh battery offers approximately 22% more power than the 2350 mAh battery which makes it ideal for solutions that deploy high-speed WWAN and WLAN radios, data capture devices and other peripherals. The 3000 mAh battery is an Advanced Smart Battery that has a power indicator so that the battery's state of charge is always known. A high capacity battery door is required with the High Capacity Battery.