Late to the topic.
Won one of these from Geekzone. Thanks, by the way. Can't find the charger at the moment but i just plug in a USB cable from the computer when I am at work, or from my Ankor that Steve Biddle kindly got for me from the US. The supplied charger has fold out power pins but I suspect one from the US will have parallel pins that will need an adapter. You shouldn't have a problem. Great sound, you'll be happy with it.
It depends. Is it a 2.5mm plug? Or something different?
There are many different plugs and an adapter is not really cheap.