The Controlled Magnetic Amplifier circuitry provides years of trouble-free operation. The Battery Chargers comply with the standard of the National Fire Protection Association.
The A45M Mine Battery Charger features a solid-state design with a minimal number of electronic components for the greatest reliability. Operation is easy, just plug in the battery.
The A46/A46F Engine Start Battery Charger is specifically designed for maintaining and recharging starting batteries of engine generator sets. 
The A40/A40F Engine Starting Battery Charger provides precise and constant output voltage to charge your batteries. A40F is a filtered charger.
The Magnetic Amplifier design battery charger/eliminator has an extremely high MTBF. Battery Power Systems