We are a company who make and sale Portable Rechargable Battery since 1999. Our new model "powerbar" is a universal battery pack, compatible for mobile phones, game players, MP3/MP4 & IPOD, PSP, GPS and all digital devices with 5.5 output voltage. It has dual functions for both backup battery and charger, equivalent to six times of the capacity of an ordinary mobile phone battery. And, it has a mini size. You can carry ?Powerbar' for power demand at anytime, anywhere.