Official 2,550mAh Wii U GamePad battery announced in Japan, promises up to 8 hours of gameplay | Engadget
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Amazon.com: OSTENT 3.7V 1500mAh Rechargeable Battery Pack Replacement for Nintendo Wii U Gamepad : Video Games
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32GB White Wii U, Rechargeable Wii Remote Battery And 2550mAh GamePad Battery Announced | Nintendo Life
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Nintendo's high-capacity Wii U GamePad battery comes to the US, $32 for 8 hours of playtime | Engadget
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