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Amazon.com: UCEC Wii U Gamepad Battery, Wii U Accessories 3600 mAh Wii U Battery Replacement Rechargeable Battery Pack Compatible for Nintendo Wii U Gamepad : Video Games
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1pc 3.7V 3600mAh Rechargeable Li-ion Battery Pack for Nintendo Wii U Gamepad Battery for Wii-U Wiiu GamePad Controller Joystick