Can this be used to power a coolbox and power source inverter?
We only have 1 cigarette socket in the car which will need to be used for the Sat Nav. Can we use this to power the Sat Nav and a dvd player plus another item such as power source inverter or coolbox (either at separate times or together)?
You can attach up to 4 items however you must not exceed the socket rating for your car. For example, my car allows a maximum of 12Volts 120Watts, any higher wattage connected will blow the fuse. Check you manual for your socket rating.