The lights on the DuraCharger provide important information about its status (all combinations will be detailed in the user guide)
Here are the most common light status's:
Flashing Green (1 second on, 4 seconds off) - In standby
Breathing Green (1 second on, 1 second off) - Charging
Breathing Yellow (1 second on and 1 second off) - Plugged
In Flashing Red - CP Fault, current leakage or over voltage