Duracell DJUMP~17 Instant Jump Start System... The Duracell Instant Jumpstart System is an easy~to~use power solution when dealing with dead battery emergencies and eliminates the need for a second vehicle to boost your battery. Its built~in emergency light allows you to see under the hood in the dark and the reverse~polarity indicator ensures the included jumper cables are correctly connected to the battery terminals. The 400 cold~cranking amps will jump~start most vehicles. The Duracell Instant Jumpstart System also features one DC outlet so you can power any 12~volt device such as a portable cooler or a coffee maker.