These are a USB cable that have one end to plug in to your USB cable and the other that plugs in to the device you want to charge, such as a cellular or PDA, but each cable is specific to the brand of phone you have. Nice thing is they are small and as a standard USB cable, so ideal for traveling. I got mine from CompUSA. I use mine with a new notebook carrying case CompUSA and Best Buy carry from APC called Travel Power Case.
USB Cables
http://www.compusa.com/products/prod...990&pfp=BROWSE
Case
http://www.compusa.com/products/prod...980&pfp=BROWSE