3 stages – fast, absorption, precision Short circuit protection Over current protection Over voltage protection Reverse polarity protection Multiple output cords 2 color charge-stage indicator For deep cycle, starting, and sealed batteries A more powerful version of the Adventure Power 12 volt 2.0 amp output charger, this 4.0 amp battery trickle charger maintainer will charge and maintain sealed lead-acid batteries in scooters, ATVs, dirt bikes, motorcycles, personal watercraft (PWC), automobiles, and boats Keep your ride ready to roll with this Adventure Power charger made by Universal Power Group (UPG)Description A more powerful version of the Adventure Power 12 volt 2.0 amp output charger, this 4.0 amp battery trickle charger maintainer will charge and maintain sealed lead-acid batteries in scooters, ATVs, dirt bikes, motorcycles, personal watercraft (PWC), automobiles, and boats. Keep your ride ready to roll with this Adventure Power charger made by Uni