CTEK Comfort Indicator - Cig Plug
Comfort Indicator uses a simple 'traffic light' system to show state of charge of your battery. A flashing green light shows the battery does not require charging. Orange means that battery should be charged to avoid harmful acid stratifaction. A red light warns that the battery is discharged to a point where sulphation is occuring and also that the vehciles may be in danger of not starting.