Schumacher 3 Amp Fully Automatic Electronic Trickle Charger/Maintainer: * Fully automatic microprocessor controlled * 100 amp engine start for emergency starting * 10/20 amp fast charge for self-adjusting, variable charge rates for everyday charging needs and maintaining your battery in peak condition * Charges and automatically desulfates and restores car, truck, RV, farm equipment, AGM, gel cell and deep-cycle batteries * 2 amp slow charge, for charging and maintaining small batteries such as motorcycle, ATV, snowmobile and lawn tractor batteries * 125 amp Sure-Grip clamps for top and side-mounted battery posts * Electronic touch-pad controls are easy-to-feel switches for selection of Digital Display, Battery Type or Charge/Start * Choose from 12V regular automotive, 12V deep-cycle, 12V AGM or gel cell batteries * Built-in digital voltmeter/tester helps diagnose problems * Retractable handle serves as convenient cord wrap and for easy portability