A power supply device, in particular a charging apparatus, includes at least one housing unit and at least one interface unit, which is arranged at the housing unit, and has the purpose of coupling electrically to at least one electrical unit, in particular to a rechargeable battery pack. The power supply device further includes at least one real-time operating system-capable, in particular multitasking-capable, open-loop or closed-loop control unit which is configured to automatically perform actions, in particular to provide at least one set of data to the electrical unit, in accordance with an evaluation of, in particular, item information of the electrical unit not related to charging.