It comes with the batteries for 2 Wiimotes

You can get it from a number of places for under £20, but this was the cheapest that I found.
Nyko also do a model which has just come out. The stories of the Joytech version breaking your Wiimote sound a little worrying, but I am sure that they would have been recalled if they were doing that much damage. So I reckon they are fine.
If anybody has experience of either , please post.
For me, its better than buying rechargeable AA's as you have to fiddle about. With this, you dont have to worry.
It shows how overpriced the 360 charge stuff is :(