BT-USB-AA USB power Back-up kit
The remarkable new Sentina uCharge (Model BT-USB-AA) is the smart power solution for virtually every manufacturer of USB based cell phones, personal digital assistants (PDAs), video games, and MP3 players. Specifically, the Sentina uCharge works with the Apple iPhone® 3GS/3G, iPhone®, iPod®, and iPod® Touch.

In all, the Sentina uCharge is compatible for use with most USB devices.