Socket Mobile Power Pack

"The Socket Mobile Power Pack is a small, light weight mobile charging source for users of portable electronic devices such as Pocket PCs, palmOne devices, PDAs, mobile phones, Smartphones, BlackBerry’s, digital cameras,MP3 players as well as Socket products (Cordless GPS receiver, Cordless 56K Modem, Cordless Serial Adapter and Cordless Hand Scanner). It’s a 5 volt battery pack that can charge/run most 5 volt electronic devices and products that draw power from a USB port."

http://www.expansys.com/product.asp?code=116815