Say goodbye to expensive batteries with the Mad Catz Rechargeable Battery Pak for the Wii Fit Balance Board. Simply remove the battery cover and batteries from your Balance Board and replace them with the Battery Pak for up to 20 hours of continuous energy. The included USB charge cable compatible with the Wii and PCs makes recharging the internal batteries easy and convenient.

Key Features :

• Battery Pack for Wii Balance Board
• Compatible with Wii Balance Board Power Supply
• Large Capacity Rechargeable Battery
• Batteries Can Be Charged While Board Is In Use Through a USB Cable