On-board starter battery gives more cranking power than any fast charger – up to 1100 Amps cranking power; Will accommodate a user supplied Group 31 battery; Assists both customers and employees where there is no electrical power; Recharges battery up to 20X faster than hand-carried units; Solid state circuitry monitors battery condition and maintains maximum state of charge; Fully automatic 10 Amp charger recharges starter battery or any on-board 12 Volt battery; 12-Volt DC power outlet