It varies, depending on the usage and other factors, but in general, it takes about 3-4 hours to charge the Wii U gamepad
The Wii U gamepad cannot be used with the Wii.
No. The Wii U gamepad is not compatible with the original Wii.
All Wii U games can be played with only the gamepad while some can utilize the Wii remotes
All new Wii U consoles include a Wii U gamepad. As of February 15th, 2013, gamepads are not sold separately.
No, the Nintendo Wii U can be powered on without a gamepad and a Wii remote can be used to open applications and games on the Wii U. However, it is strongly recommended to have the Gamepad because all Wii U games are compatible with the gamepad, but not all Wii U games are compatible with the Wii remote and classic controllers
No sadly you cannot but you can play with the gamepad as long as the console has power so you can play an assortment of games that dont need the television
Certain Wii U games have the ability to display the game on the gamepad only. This allows someone to be playing a game on the Wii U while the TV is being played for something else. Some games will automatically mirror what's displayed on the TV on the gamepad's screen while other games need to be set to display on the gamepad instead. There are also some games that require the use of both the TV and the gamepad.
No. It is part of what makes the Wii U special.
Approximately 3 hours.
Wii U games cannot be played on the Wii.
The Wii U has an internet browser that allows you to view webpages on the TV and on the GamePad.
It can take a few hours depending on how run down it is.