how to power the minibot

Looking at the rules for the minibot and the parts allowed, I can not see how you are suppost to use the NXT on the minibot. From what I can tell, you connect the DC motors to the motor controller, which has the battery wired into it and then connect the controller to an NXT motor port. Batteries to power the NXT arn’t listed in the parts you are allowed to use. How are you suppost to power the NXT?

Batteries are considered an integral part of the NXT, thus they are allowed.
http://forums.usfirst.org/showthread.php?t=16492&highlight=Batteries