Nintendo DS Lite Purchased in the USA

Question

I purchsed a Nintendo DS Lite in the USA and I am having problems with recharging the battery as there is no orange light showing that it is being recharged and obviously when I turn it on, it goes dead after the initial opening screen. I am living in the UK and use a normal travel adaptor. Any suggestions or should I just order a new Console adaptor with a UK 3 pin plug, will I also need to order a rechargeable batterie in the UK so that I can use the 3 pin plug with this? Does anyone know if there is a power convertor switch on the console are the units pretty much universal. Any help would be appreciated as I bought two consoles in the US for my daughters xmas present.

Thanks