Method and charger for charging at least two batteries

The accumulators are charged sequentially in a charging phase (P1) up to a charging state which is a low charging state. The accumulators are charged sequentially in a charging phase (P2) to a higher charging state. The accumulators are charged in ascending order of charging levels (L1-L4) before the start of the charging phase (P1). Independent claims are included for the following: (1) charger for charging accumulators; (2) mobile electrical appliance; and (3) set comprising mobile electrical appliance and electrical handset unit.