Select the desired charging voltage and the microprocessor-controlled charger does everything fully automatically until the charging cycle is completed and the batteries are fully charged. The German language display is easy to understand and comfortable to use. The memory function continues the charging process even after power interruptions without having to start from the beginning. Four charging programs are available. Fully automatic battery charging takes place in 5 charging steps. The microprocessor in the charger has a memory function. If the 230V supply is interrupted during the charging process, the unit stores the previously selected charging program. After the mains supply is restored, the unit starts automatically and continues charging in the last selected program. 4 programs: Program 1: 6 V (7.2V/1A)Suitable for 6 V batteries with a capacity between 1.2 and 30 Ah in normal condition. Charging program for WET, MF, EFB batteries and most GEL batteries.Program 2: 6 V (7.4V/1A)Suitable for 6 V batteries with a capacity between 1.2 and 30 Ah in cold conditions. This charging program is also designed for many AGM and some EFB batteries.Program 3: 12 V (14.4V/1A)Suitable for 12 V batteries with a capacity between 1.2 and 30 Ah in normal conditions. Charging program designed for WET, MF, EFB batteries and most GEL batteries.Program 4: 12 V (14.7V/1A)Suitable for 12 V batteries with a capacity between 1.2 and 30Ah in cold condition. This charging program is also designed for many AGM and some EFB batteries.Charging Steps:Step 1: InitializationChecks the condition of the battery to determine the charging process. If the battery is deeply discharged, pulse charging is initiated to refresh the battery.Step 2: Pulse ChargingAchieves the recovery process of deeply discharged or sulfated batteries by weak pulsating current.