This manual wheel charger is a versatile wheel-style charger which is great for both slow and fast applications on 6 and 12-volt batteries. The high-output engine will assist batteries in cranking most engines under severe summer or winter weather conditions. Its 200-amps help engines for emergency starting and the 40-amp fast charge helps to charge a battery in 1-3 hours. The 2-amp trickle charge charges a small 12-volt battery in 2-12 hours. It is back-lit, impact-resistant, and has a color-coded meter for work convenience before dawn and after dusk.