Schumacher"s 12 Volt Manual Starter Charger is great for everyday charging needs. It is a professional, manual charger with different charging rates and engine start for 12 Volt batteries. Features 150 ampere engine start for quick starting, 55 ampere boost charge for large batteries, 20 ampere fast charge for charging a large battery in 3 to 5 hours, and a 2 ampere trickle charge for charging a small 12 Volt battery in 2 to 12 hours.