This is the pocket-sized battery that charges an iPhone or any USB device.
Eliminating the need to carry multiple chargers and power cords, the battery provides 25 hours of talk time for iPhones and Android smartphones, and 4-1/2 hours of use for an iPad. With a 30-pin connector for Apple products, its USB cable has built-in connectors that enable use with any device that recharges with a mini- or micro-USB port; also charges iPods, GPS receivers, tablets, and Blackberries.
With built-in protection against power and temperature surges and high-input voltages. It automatically switches to power-saving mode after 10 seconds of inactivity to preserve its energy store. It recharges via a computer's USB port.
3-1/2" L x 1-1/4" W x 3/4" D. (2-1/2 oz.)