What do I need to play a DS lite from Hong Kong in the UK?

Hey guys,
Not really a PC related question, but I know there are some experianced gamers on this forum so maybe someone can answer my question.

I just bought a Nintendo DS Lite on ebay from Hong Kong, a complete impulse buy, it had 30 seconds left (I got it for £65 which is not bad seeing as it will sell for £100 when it arrives in the UK on 23rd June). Anyway, can someone tell me what I need to charge this (I'm guessing Chinese) DS lite in the UK?

Thanks