The invention relates to a cleaning apparatus comprising a cleaning unit driven by an electric motor and a housing which has a battery chamber for accommodating at least one rechargeable battery, a connecting device having a mechanical mounting part and an electrical plug connector part being disposed in the battery chamber for establishing an electrical and mechanical connection between the battery and the cleaning apparatus. In order to further develop said cleaning apparatus in such a way that batteries of different physical shapes can be used, the invention proposes that the mounting part is detachably mounted in the battery chamber, and the plug connector part is detachably connectable as desired to the mounting part or to a chamber wall of the battery chamber.