Selfcharge auto jumper Safe, easy, no hassle, and no open hoods or jumper cables needed! Features: Plug this auto jumper into the cigarette lighter socket, and in 10 minutes you're ready to go! Powerful ni-cad battery(5amps,14.5v) inside has the power to let you start your Vehicle from the warmth and safety of your car's interior! Unaffected by extreme weather conditions from -5°f to 120°f Recharge from your car battery through the cigarette lighter while driving 30 to 120 minutes or with the availabe ac adpater accessories Keep your car's clock, radio, alarm, and your car's computer memory while you change our battery Built-in trickle charge protection