I have the Nyko Charge Station, and it's nice, also the rubber grips are awesome, but having to disconnect the nunchuck sucks. I recently saw a new rechargeable kit at Target - it's made by Psyclone. It's a rechargeable battery kit that charges via USB, which is awesome, because you can leave the Nunchuck plugged in, or even the GH3 guitar, if you use a USB extension. They're $10 each for the battery and the cable, I might get a couple, just for the convenience. The only downside is they are very, very light, either that or someone stole the batteries out of the pack (it was kind of open). It may even just run on regular-ass rechargeable AAs, and charge via USB (AA is 1.5v, USB is 3.3-5v, IIRC).