WirthCo 20093 Battery Doctor 6/12 Volt 2/10/55 Amp Battery Charger with Engine Start For Use on Lead-Acid, Gel Cell and Deep Cycle Marine/RV Batteries 55 Amp Engine Starter for Emergency Starting 12V 10Apm Automatic Charging Mode/12V - 2/55Amp, 6V 10 Amp Manual Charging Mode 6/12V - 10 Amp, Fast Charge for Everyday Charging Needs 12V - 2 Amp Trickle Charge for Keeping Stored Vehicles Charged