This battery charger is a 12/24 volt deep cycle charger for deep cycle or wet batteries. It operates in automatic or manual mode and features a 10 amp current charge which charges a 12 or 24 volt deep cycle battery in 7-11 hours, and a 12V automotive battery in 3-5 hours. The automatic feature shuts off when the battery is full and restarts when needed automatically. So there is no more overcharging your battery or need to tend a battery during charging. Manual override switch allows manual operation when needed.