Buy Repairs Nintendo Wii U Repairs: Gamepad Top Charging Port Replacement Service | eStarland.com
I've compared the prototype E3 gamepad against the retail version. Nintendo did make some changes after the E3 in 2011 when they exhibited the console. : r/wiiu
Wii U GamePad Android knock-off review | Eurogamer.net
Amazon.com: Nintendo Wii U Black Gamepad - Replacement ONLY - no cables : Video Games