Nintendo has confirmed that you will be able to connect two of them to the console, which was apparently in doubt. The battery life of the GamePad is about what we expected, checking in at 3 to 5 hours of play time (a number that seems a bit optimistic to us). Nintendo claims that it takes about 2 to 2 ½ hours to fully re-charge the GamePad. The GamePad uses a high-performance lithium ion battery that is very lightweight.
No word yet on how much the second GamePad will cost when it is released.