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Play longer with Nyko's UBoost for the Wii U GamePad . The UBoost works in conjunction with the existing GamePad battery providing 2x the battery power for up to 10 hours of playtime. The extra playtime of the built-in battery is complemented by a built-in stand, perfect for watching streaming content such as movies or TV shows on the GamePad's screen. The UBoost easily clips on to the back of the GamePad with no need to remove the internal battery or back cover, making installation as easy as possible. Once you're done playing, the UBoost easily recharges through the standard GamePad AC adaptor or fits into the offical GamePad charging dock.