The Schumacher PS-1022MA is a economical manual or fully automatic 12 volt charger. It features a 10 amp fast charge which charges standard automotive battery's in 3 to 5 hours, a 2 amp trickle charge which charges a small 12 volt battery in 2 to 12 hours. The automatic feature shuts off when the battery is full and restarts when needed automatically. No need to tend battery during charging and no more overcharging your battery.