The Nintendo GameCube InterAct Mobile Power Back Battery Pack is an external attachment designed for the Nintendo GameCube console. It is made of plastic and features a purple color. This battery pack allows for extended gameplay by providing additional power to the console. With a wired connectivity option and compatibility with the Nintendo GameCube platform, this product is a reliable accessory for gaming enthusiasts looking to enhance their gaming experience. The InterAct brand ensures quality and reliability, making this battery pack a practical choice for gamers looking to extend their gaming sessions.