There are a number of chargers that'll work on the Sony range - same one will work for 350.650, or T1.

You may well have one already! If it's for phone/laptop/mp3 etc... if it's got the right plug, and is, well,  reasonable quality, try it !  if it works, there you go.....

However,  WARNING, nothing that is for anything Apple-y ! They don't like each other, and they'll get sick....

You can get a dedicated one from Sony online , or you can root around on Amazon/ebay etc... But make quite sure it is compatible - and if it's very cheap, it is so for a reason !

And a PowerMonkey works, too, by the way, which is incredibly useful, they really are brilliant....