Do you have a portable cooler with a 12-volt or 12/24-volt connection, or are you planning to buy one? Then you will always have the option to run it from the mains too. With the matching Dometic CoolPower mains adapter you can use it on a mains socket at home, in the hotel, or in your holiday home. That will give you a much wider range of possibilities.
COOLPOWER EPS 100