[mman1506]

We have been running two FRC batteries in parallel for years without issue on a few of our demo bots. Once nice feature is you can hot swap batteries without turning the robot off which is especially nice for LabView programmers who haven't permacoded. We have also use a deep cycle battery on a robot without issue, just make sure the bot can handle the weight of a typically larger marine battery and watch out for leaks if you're driving it.