Monoprice External Battery Pack/Charger 5000mAh
This external battery will easily fit into a pocket or purse. It carries a maximum charge of 5000mAh, so it can fully recharge the battery of any existing mobile phone or tablet and still have charge to spare.
To charge your device, simply plug one end of a USB charging cable into the device and the other into one of the two USB ports on this battery pack. One port can provide up to 1 amp of 5 VDC charging power, while the other provides up to 2.1 amps, which is enough to charge the iPad at full speed. Both ports can be used at the same time, but the total power output will be 2.1A, divided between the two ports.
The battery pack itself is also charged using a USB power source. Four LEDs on the battery pack display both the existing charge and recharging status. The button on the front of the battery pack is used to check the charge status and to turn on or off the charging output. A 30″ USB A male to USB micro-B male cable is included.