This "Signature Series" battery charger from Schumacher combines the rugged durability of a polypropylene case with high tech features and design. This model features reverse-hookup safeguard and super-grip clamps for top and side-mount battery posts. It starts vehicles with the 50 amp engine start and charges both large and small batteries. The 10 amp fast charge is great for everyday charging needs. 2 amp trickle charge setting charges a small 12 volt battery in 2 to 12 hours. This manually operated unit is versatile and easy to use.