Battery charger 10/2 fully automatic dual-rate. This economical 12 volt charger can be used two ways. Manual or fully automatic. No overcharging worries when in fully automatic mode. 10 amp fast charge for everyday charging needs. Charges in 3 to 5 hours. 2 amp trickle charge, charges a small 12 volt battery in 2 to 12 hours. LED light signals fully charged. Fully automatic will not overcharge batteries.