The Schumacher DSR124 DSR ProSeries Fully Automatic Battery Charger with Engine Starter, Boost, and Maintainer has a 330 amp engine start that is powerful enough for SUVs, trucks, and large engines. A 30 amp/80 amp boost mode quickly charges batteries. The fully automatic microprocessor control prevents overcharging and damage to both the battery and unit, while float-mode monitoring automatically maintains optimum battery charge. A digital display with LED indicators and a touchpad allows for easy use and includes a user-controlled start/stop interface.