Never get stuck needing a jump again with the Self Charge Auto Jumper. A must have for any car trip, this auto supply is a surefire way to get out of tough situation.Don't have jumper cables? Don't want the hassle of open hoods and possible electrocution? No problem! Trust the Auto Jumper! Plug this 12V Portable Battery Jump Starter into the accessory socket of a vehicle with a weak battery. In about 10 minutes you're ready to go! The Auto Jumper's powerful Ni-Cad battery lets you start your car while you sit safely in your car - absolutely unaffected by extreme weather conditions. And recharging is a snap -- it fully recharges from your car battery via the cigarette lighter, while driving for 30 minutes to 120 minutes.