HEAVY DUTY SUPERCAP JUMP STARTER: Unique supercapacitor technology makes SuperCap 2 easier to use. And it has a longer lifespan than traditional battery car jump starters. POWERFUL 12 VOLT CAR JUMP STARTER: Up to a 800A peak current, SuperCap 2 can start the vast majority gasoline engines and diesel engines up to 4.0L in just a few minutes.