The Sealey emergency jump start has a professional grade, high output AGM battery that has been especially formulated to jump start vehicles. This model features a robust case, which is durable and corrosion proof for easy portability. The battery includes an automatic maintenance charger, with patented microprocessor controller to enable speedy charging and thermal runaway protection. Completing this jump starter is an audible warning system (AWS) which signals if the unit has been turned on for too long without being connected to a battery, and easy cable and clamp storage to ensure the unit is compact and tidy when not in use.