[Al Skierkiewicz]

Bill,
That seems like a big overkill since our robots won't sit there shoving against another player for the full two minutes. You are not only stressing the battery but the drive motors and controllers as well. I can tell you that there is a huge list of teams that have asked this question, admitting that as little as 1:30 of heavy driving killed the battery. Driving in practice should give you a fair indication of battery use. Teams when pushed to the limit will try to devise faster methods of battery charging (to keep up with demand) which starts that downward spiral of early battery failure. The KOP battery can be safely charged at 6 amps maximum, which would require at least 3 hours to fully charge the battery if it was fully discharged. Remember that the backup battery only hides the real problem. A dead primary battery will keep you from driving whether the RC is functioning or not.