[excel2474]

Thanks a lot for your reply. This was helpful.

No, the only reason I am using the lead-acid battery is because it is a battery that we already have several of. It's a small robotic football competition with my school. Because I the plays are very short, I will have time between plays to change the battery if need be. I just want to make sure that while I am using it, I'll be able to provide enough power to the motors to accurately throw the ball and not have too much change in voltage.