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,
Comparing all three batteries for the Wii U Gamepad - YouTube
How to Change the Battery Pack in a Nintendo Wii U GamePad - YouTube
Nintendo Wii U GamePad Battery WUP-001
Remote Internal Battery Pack for Nintendo Wii-U | 2000mAh | BAQ | New
Replacement Battery Cover For Nintendo Wii U Gamepad - Black | ZedLabz
For Nintendo WiiU Black White Gamepad Battery Cover Lid Door For Wii U Connsole - AliExpress
Was the Wii U GamePad's Short Battery Life Planned? — The Indy Gamer
Wii U GamePad Battery Pack Hands-on Preview - Hands-on Preview - Nintendo World Report
Nintendo Wii U GamePad Battery WUP-010, WUP-012
New Extended Replacement Battery for Nintendo Wii U GamePad WUP-012 -> WUP-013 | eBay
Battery Cover Kit ( Wii U GamePad ) White : Amazon.co.uk: PC & Video Games
Wii U GamePad Battery Replacement - iFixit Repair Guide
I bought the extended Gamepad battery. I see Nintendo planned a spot for it all along. : r/wiiu
Guide to the Best Wii U Replacement GamePad Battery - Nerd Techy
1pc 3.7V 3600mAh Rechargeable Li ion Battery Pack for Nintendo Wii U Gamepad Battery for Wii U Wiiu GamePad Controller Joystick|Batteries| - AliExpress
Bought a wii u but the gamepad battery dies quickly not even 10 min, the battery seems right what else should i check? : r/wiiu
Amazon.com: UCEC 3600 mAh Replacement Rechargeable Battery Pack for Wii U Gamepad : Video Games
Wii U GamePad Battery Replacement - iFixit Repair Guide
Our gamepad is broken, is there anything we could do to fix it. More details in comments : r/wiiu