Charge your drained car batteries without the use of complicated jumper cables.
Three easy steps to use: (1)PLUG, (2)CHARGE and (3)START Works with most 12V vehicle adapters, no jumper cables required Automatic charging process-- no buttons or switches for operation LED light indicates charging status Compact battery booster design stores neatly in most glove compartments. Works with most 12V vehicle adapters. No jumper cables required Ideal for use when stranded with a drained battery.