Nyko Power Pak triples Wii U gamepad battery life
http://www.neogaf.com/forum/showthread.php?t=507552
http://www.nyko.com/products/product...+Pak+for+Wii+U
Power Pak for Wii U
$24.99
Triple the capacity and play time of the original GamePad
Includes mini screwdriver for easy installation
Works with the existing Nyko and first party charging solutions
Fits entirely into the existing GamePad Battery compartment – no additional bulk
CE and EL certified high quality lithium polymer battery