I feel that you don't have to get anything special for touchpad, it is just a AC-to-USB adapter, with some specs on output power.
Any cheap wall charger on Amazon [amazon.com] would work, or some for FAR [macmall.com] all the time
EDIT: I quoted the output specs on the original wall charger for TouchPad borrowed from my roommate as below
"OUTPUT: 5.3V - 2.0A"
so as long as it's ~5 volts with some Amp coming out, say even 800mA, it'll charge your touchpad, just a little bit slower.
I personally wouldn't spend 8 bucks on a charger, whose job could be done by couple of cents...
Last edited by celeritini; 10-15-2012 at 10:25 AM..
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