Robot Advance allows you to create or to modify your robot. ...
Power Expander
Use the VEX Power Expander to add a secondary power source for four of the PWM outputs on the VEX Microcontroller.
Balance a robot's motor load across two batteries to extend robot run time and increase performance.
The VEX Power Expander also incorporates an internal circuit breaker to prevent damage to the unit or connected devices.
The Feedback LED provides the battery and circuit breaker status of the unit.
Refer to the following Feedback LED Status Chart for more information.