Powerful, energy-efficient, and compact. A dual-bank battery maintainer charger with 8 amps (2 amps per bank) to simultaneously charge and maintain multiple batteries from vehicles such as cars, motorcycles, boats, ATVs, RVs, lawn mowers, lawn tractors, trucks, and more. The built-in temperature sensor detects the ambient temperature and adjusts the charging to prevent overcharging in hot climates and undercharging in cold climates. It automatically detects battery sulfation and acid stratification to restore lost battery performance and extend battery life.