The first generation of Skylanders Portal of Power for Wii and PS3 is powered by 3 AA batteries. It is well known that these portals consume a lot of power during play. A set of AA batteries only last a few hours. You have to  change them frequently, which disrupts play.This battery pack is specially designed for Wii and PS3 Portal of Power. It  includes a high performance rechargeable battery and a 1.9 meter long USB charging/power cable. You can enjoy unlimited play with this rechargeable battery pack for Skylanders Portal of Power. The battery pack is powered by an included USB cable. You can charge it from any USB power source including Wii or PS3 console.