The JNC8800 delivers 800 Start Assist Amps, whether the outside temperature is 70˚F or -30˚F, overcoming one of the biggest problems of battery-based jump starters – deteriorating cold temperature performance as the temperature drops. It is also able to provide endless jump starts from a single charge based on two factors: 1.) the ultracapacitor power source can be charge from the disabled battery to be jumped, and 2.) when the disabled battery is jumped, the ultracapacitor power source can be recharged from the now running vehicle. This makes the unit particularly applicable for dealerships, auto auctions, fleet service and tow operations, where operators are often required to jump multiple vehicles in a row.