Normally when one performs a firmware update on a piece of hardware, you generally make sure it remains plugged into the power source instead of relying on the internal battery's charge (where possible), and you do not touch any of the cables hooked up to it until the entire process is done. The thing is, video game industry journalist Ben Fritz unplugged his spanking new Wii U during a firmware update as there was no way to cancel the download and he did not want to wait for the stipulated two hours required to complete the update, resulting in a bricked Wii U.
Ubergizmo , Wii U Bricked During Firmware Update, Wii U Bricked During Firmware Update
