Ok i just thought this was cool. My mouse and xbox controller batteries just died and im broke. Not good. So i remembered i had an old game boy advanced rechargable pack, and i remembered taking it apart before and it had 2 sets of AA batteries. So long story short i ghetto rigged some gameboy batteis in my mouse. My controller has differt style terminals so i gotta do some more stuff to the other pack. I just thinks its pretty cool, also in order to charge them i have to tape on the wires, gotta love it.