Hi all I get a land rover discovery 2 I have get two radio and light units I would like to know what the best to way to set them I don’t what to left my the car run and they not room for a 2nd car battery as I like to keep my light running while not in the car What where should I go with is set up

Hi all my name this Thomas I own a land rover discovery 2 I use it for work and i am slow kite it out but maybe need help with stuff going down the line