1.It uses for Wii Balance Board power supply.
2.With large capacity rechargeable battery, can charge more than five hunderd times.
3.It has a smart design, can be regulary serviced by fastening the Balance Board battery slot, it can be charging and using at the same time.
4.It can also be charged through USB cable.
5.Fist time charge must be more than 12 hours, usual charge is more than 5 hours.