Combination of a transport system (1), to be carried on the back of a user, of at least one rechargeable battery (3) and of an electrical device (10) to be operated, where the battery (3) is releasably arranged in the transport system (1) and is connectable by means of a flexible cable (7) to the device (10), where the device (10) can be transported or moved by the user, where the battery (3) has, in addition to its output electrical connection (3e), mechanical or magnetic joining elements (3a, 3b, 3c), corresponding to respective electrical connections (5) and mechanical or magnetic joining elements (4a, 4b, 4c) of the system (1 ) transport and electrical apparatus (10) in such a way that the battery (3) can optionally be connected electrically and mechanically or magnetically with the transport system (1) or with the desired electrical apparatus (10)； where the transport system (1) on its face associated with the user's back has a base (2) to receive the battery (3), which has the aforementioned electrical connections (5) and the elements ( 4a, 4b, 4c) mechanical or magnetic bonding； where the transport system (1) has at least one additional electrical connection box (17) in which the battery voltage is connected, when a battery (3) is available in the transport system (1), where either the additional electrical connection box (17) is provided directly in the transport system (1) to connect a flexible cable located in the electrical appliance (10) or where the transport system (1) comprises the cable (7) flexible； and having at its free end the electrical connection box (17) and where the electrical connections (5) on the side of the transport system (1) are connected to the electrical connection box (17)； characterized in that the electrical device (10) also has a base (2 ') to receive the battery (3), where at the base (2) of the transport system (1) and at the base (2') of the device ( 10) corresponding electrical connections (5) have been respectively provided
