[EricH]

Originally Posted by chmconkling

Deep cycle batteries are not allowed in the event. Some regionals don't care but the one I was a safety advisor at, one team wanted to use one and we had to end up taking it from them.

Got a source? Neither the FRC Administrative Manual nor the FIRST Safety Manual says anything about deep-cycle batteries that I can find. On the robot, sure--everyone has to use the same batteries, and that's in the rules. Not on the robot, I see nothing at all to prevent someone from bringing one in, barring safety concerns (and if the battery is handled properly, not a concern).