Method and apparatus for executing a charging operation of a device battery

A method for determining charging profiles for device batteries (41) of battery-operated devices (4), the charging profiles determining the execution of respective charging operations of the device batteries, the method comprising:

• selecting (S3), via an electronic processor, device batteries (41) having the same usage-related load and the same aging state;
• dividing (S4), via the electronic processor, the selected device batteries (41) into groups;
• assigning (S5), via the electronic processor, different charging profiles to the groups of device batteries, wherein the charging profiles indicate for a charging operation a maximum permissible charging current depending on a charge level range;
• operating (S5), via the electronic processor, the device batteries (41) of all groups with the respectively assigned charging profiles for a predetermined period of time, so that charging operations are executed depending on the respectively assigned charging profile;
• detecting (S8), via the electronic processor, a change in the average aging state for each group of device batteries (41) between the beginning of the predetermined time period and the end of the predetermined time period;
• and
• adjusting (S10, S11), via the electronic processor, the charging profile of at least one of the groups of the device batteries (41) depending on the change in the average aging state in order to reduce the load on the device batteries (41) of the at least one group.