I think I am using the USB charger plug that came with an old GPS unit that I had. As far as I know, there really is no need to buy a special one. The USB cable is just one that I had laying around, I think. The Ipod touch has it's own cable (mini-USB to fit into the charger, but a special fitting to fit into the Ipod Touch).
I had heard of some folks having trouble with cheaper charger plugs with their Iphone/IpodTouch, I guess because they were not quite built to specification.
But mine is the standard USB 5 Volt output, which I believe is what the USB specification requires. It says 5.0 Volts, 1.0 Amps maximum and, of course, 100-240 Volts input. Made in China, Switching Power Supply, Model PSB05R-050Q, but no brand name (or maybe it is I.T.E. Power supply).
Travis
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