Somehow managed to fit a 10,000mAh battery inside of my Wii U game

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Krisdonia 50000mAh Laptop Power Bank External Battery Quick Charge 3.0 Portable Charger for Laptop, Smartphone and Other Digital Devices : : Electronics

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Somehow managed to fit a 10,000mAh battery inside of my Wii U game pad! Battery life from around 2 hours to (so far) more than 13 hours at full brightness. See captions