The VIKING® 6/12/25/125 Amp, 6/12V Battery Charger, Engine Starter, and Alternator Tester easily charges, reconditions, and maintains 6V and 12V batteries, jump-starts 12V engines, or tests alternators with fast, efficient, and worry-free operation. The engine starter delivers a 125 amp boost to start 3L V6 and 2.3L diesel engines. Compatible with standard, gel, marine, spiral, AGM, and deep-cycle batteries, this charger is excellent for use with automobiles, SUVs, light trucks, RVs, riding lawn mowers, motorcycles, boats, forklifts, and tractors.