I got an FM transmittor for my PC for xmas; but I think it takes a battery... idealy Id like to have a USB powered one that then requires no outside power; one plug and its set. if totally nescessary tho; 12v DC would be ok.

any good buys in this area? I hate batteries; I dont like having to replace them in stuff like this; if its not truely portable and a fixed source of power is available, no reason to screw around with them.