This is an awesome bit of kit, I originally bought one a few months back from Tkmaxx for the same price.
It acts like an extended battery pack for any device that charges through USB via regular AAA batteries, and also allows you to charge the AAA batteries from a power socket or through the car 12v socket.
* Emergency mobile pack
* Comes with 8x different tips to fit various devices
* Fits mobile phones, MP3, PSP and DVD players
* With LED torch
* Charges the device
* Charges from USB
* Complete with 4x 1000mAh AAA cells
* Can be used with alkaline batteries :Also provided - 12v car charging socket