The Wii Fit Balance Board is coming to the US soon and like the WiiMote, it takes batteries to operate. Nyko`s got a solution for you if you don`t want to buy batteries. The Energy Pak for the Wii Balance Board installs on the underside of the board and will let you play and charge at the same time. They claim you can play for 20 hours on one charge and is expected in stores on May 19th for $20. I`m surprised Nintendo doesn`t just create these products with rechargeable options in mind but hey, it`s nice that Nyko`s around to help out.