The exposure car charger is a great little gadget to have for your exposure maxx light it allows you to charge your light in the car whether you are on the way to your destination or if you have run out of juice at the start of your second lap and need to refuel the car charger is compatible with any 12v socket in cars caravans etc and works just like the standard 240v adapter it quickly chargers you light to give you hours of lighting so you can carry on riding without a worry about exposu