This item is a sight for sore eyes for anyone who owns a Wii Fit balance board. Have you ever had your workout cut short because you have runout of batteries? This simple rechargeable battery pack made specially for the Wii Fit balance board will make sure you always have enough power for your workout. Simply plug one end of the supplied USB cable into your Wii and the other end into the battery pack and leave it to charge. One fully charged the powerful 2800mAh battery pack will then give your hours and hours of trouble free workout fun. Don't forget you will also save a huge amount of money from not having to buy disposable batteries, a must have item. Compatible With Wii Fit Balance Board High capacity for a longer workout time before recharging High quality non slip yoga mat. Never run out of batteries again during your workout.