Schauer Fully Automatic Constant Current Electronic Charger charges faster and more accurately than conventional chargers. Charge control is constant current charge to a constant voltage and then to a float standby. The float charge holds the battery at 100% ready state. The charger can be left on indefinitely without worry of undercharge or overcharge. The CM6A has selectable amperage settings of 1 amps, 4 amps, and 6 amps, as well as profile settings to safely charge the varying types of lead acid batteries. 4 lbs (1.5Kg) shipping weight.