The Energizer ENC2A 2 Amp Battery Charger Maintainer features 6 volt and 12 volt charging selectivity. Use this for battery maintenance as well as charging RVs, specialty vehicles, antique and classic cars, marine deep cycle batteries, motorcycles, lawn mowers, ATVs, snowmobiles, personal watercraft, and more. It maintains a battery charge in stored vehicles and battery applications. The ENC2A is fully automatic, provides a charge when needed, and stops charging when the battery is fully charged or topped-off. Built-in circuit protection guards against overcharging, reverse polarity, or short circuit.