This dual voltage 2412v 20amp maximum high frequency battery charger features inverter and micro processor technology which is suitable for charging batteries such as conventional lead calcium absorbent glass matt agm and gel batteries the energy efficient inverter protects the battery from high current damage by automatically varying the charging voltage variable current output 20amp12v only 10amp or 2amp provides a quick medium or trickle charge as required simple 12v 24v push bu