Problem with drivetrain and we can't figure it out.

[MrForbes]

It's very common to find the "low battery" issue causing a few posts every year on CD. It seems to take some teams a while to figure out that you have to charge the batteries often! And that the FIRST thing to do when you have odd, unexplained robot performance, is to glance at the battery voltage reading on the driver station. If it's less than 12.5 v when the robot is enabled, but not doing anything, then you need a fresh battery.