METHOD FOR CHARGING A BATTERY PACK

A method is for charging a first and a second battery pack using a charger. The charger has a first interface, a second interface, and an electronics unit for providing a charging power at the first and/or the second interface. The controller detects that the first battery pack is connected to the first interface at a first time and the second battery pack is connected to the second interface at a second time. The controller controls the power electronics unit depending on the detected times and a predetermined time span such that the charging power is output on the first interface to charge the first battery pack and/or on the second interface to charge the second battery pack, wherein primarily the first battery pack is charged if the first time is before the second time by more than the predetermined time span.