On the PCB of the CleanJuice itself, there are 2 LEDs and colors may vary.
If the PG labeled light on the board is on, this means the USB cable is providing power to the system. This also means you can power your console from the USB without draining the battery - plug and play option.
If the CHG labeled light on the board is on, this means the USB is charging the battery. When it goes off, the battery is fully charged.
Both indicator lights will be on when module is charging. When module is fully charged, only the PG light will remain.
If you connect a USB cable and the PG light does not turn on, your cable or power supply are faulty.