Electrical connecting apparatus comprising: an output connection which is designed to be connected in a detachable manner to a charging connection of a rechargeable battery apparatus of an electrically operated vehicle, wherein the electrical connecting apparatus further has a supply connection which is designed to be connected in a detachable manner to a supply system connection of an alternating-current low-voltage integrated supply system, wherein the electrical connecting apparatus comprises an alternating current/direct current converter which is designed to convert the AC voltage of the supply connection into an electrical DC voltage which is suitable for the rechargeable battery apparatus, wherein the electrical connecting apparatus is not a constituent part of the vehicle, wherein the alternating current/direct current converter is designed to be connected to a 110 V supply system and to a 230 V supply system with an AC voltage with a frequency of 50 Hz or 60 Hz and to generate from this the adjustable-level DC voltage which can be output at the output connection, characterized in that the electrical connecting apparatus has at least one cable (40, 42) and also a cable drum which is designed for substantially completely receiving the cable (40, 42), wherein the alternating current/direct current converter is fully received in the cable drum, and the at least one cable (40, 42) connects the output connection, via the alternating current/direct current converter, to the supply connection, and in that the output connection further has a data interface which is designed for connection to a data interface of a charging connection which can be connected to the output connection, wherein the electrical connecting device is designed to output sensor data or control data to the data interface of the charging connection via the data interface of the output connection, wherein the sensor data represent a plug-in state of the output connection or other state data of the electrical connecting device, and the control data represent a driving mode blocking command, and wherein the electrical connecting device is designed to receive sensor data or control data from the data interface of the charging connection via the data interface of the output connection, wherein, after the driving mode blocking command, a driving mode can be blocked when it is determined that the cable (40, 42) of the electrical connecting apparatus is not in the fully rolled-up state in the cable drum. an output connection which is designed to be connected in a detachable manner to a charging connection of a rechargeable battery apparatus of an electrically operated vehicle, wherein the electrical connecting apparatus further has a supply connection which is designed to be connected in a detachable manner to a supply system connection of an alternating-current low-voltage integrated supply system, wherein the electrical connecting apparatus comprises an alternating current/direct current converter which is designed to convert the AC voltage of the supply connection into an electrical DC voltage which is suitable for the rechargeable battery apparatus, wherein the electrical connecting apparatus is not a constituent part of the vehicle, wherein the alternating current/direct current converter is designed to be connected to a 110 V supply system and to a 230 V supply system with an AC voltage with a frequency of 50 Hz or 60 Hz and to generate from this the adjustable-level DC voltage which can be output at the output connection, characterized in that the electrical connecting apparatus has at least one cable (40, 42) and also a cable drum which is designed for substantially completely receiving the cable (40, 42), wherein the alternating current/direct current converter is fully received in the cable drum, and the at least one cable (40, 42) connects the output connection, via the alternating current/direct current converter, to the supply connection, and in that the output connection further has a data interface which is designed for connection to a data interface of a charging connection which can be connected to the output connection, wherein the electrical connecting device is designed to output sensor data or control data to the data interface of the charging connection via the data interface of the output connection, wherein the sensor data represent a plug-in state of the output connection or other state data of the electrical connecting device, and the control data represent a driving mode blocking command, and wherein the electrical connecting device is designed to receive sensor data or control data from the data interface of the charging connection via the data interface of the output connection, wherein, after the driving mode blocking command, a driving mode can be blocked when it is determined that the cable (40, 42) of the electrical connecting apparatus is not in the fully rolled-up state in the cable drum.