Portable Smart Charger6/12 Volt Full-Rate ChargerWith 100A Engine Start. Automatic 6 &12 Volt settings turn off at fullcharge and turn back on if battery needsmore power. LED Digital Display indicates charging voltage,amperage, charge time and countdown forstart function 15/2 Amps Charger 100 Amps Crank Assist Continuous rating 12V 15/2 Amps 100A Engine Start 12V Automatic bad battery detection Automatic 6V position for lower voltage requirements Designed for Standard, AGM, GEL batteries