[Al Skierkiewicz]

The specification above (0.75 amp to 1.5 amp) is nearly correct. The five volt regulator built in is designed for a max of 1.5 amps but the RC by itself draws up to 0.75 amp. The RC is designed to draw current from the backup battery when the main battery falls below 8 volts for more than a few seconds. During this time, the backup battery supplies current to the RC and radio modem to maintain communications and the backup also supplies current to servos connected to the PWM outputs of the RC. When using the CMUCAM, the backup is supplying current to it as well.
The backup battery cannot be used to power any motors on the robot other than servos when connected the serov is connected to the RC.
As a final note, all motor control is disabled by the event controller and so all motor control must be powered by the main battery through the main circuit breaker and must controlled by either Spikes or Victors connected to the RC per the Robot section of the manual and the electrical drawing.