None that I know of. I only remember ever using it once, when I first got it. All the components are there and they appear to work just fine. It just needs to be charged and everything should be good to go.
The USB cable is made to go into the computer. I would suspect that if you had a converter/plug of some sorts that USB cables can go into it would charge just the same. I am not that tech savvy so I can only assume it works that way.