A device for charging batteries of electric vehicles, comprising at least a charging device for time-offset charging of a plurality of electric vehicles simultaneously connected to the device, the charging device comprising a charging station for providing a charging current, and the charging device comprising an electrical power supply device, and wherein a plurality of connecting devices (10, 11) being provided for connecting the plurality of electric vehicles, wherein the connecting devices (10, 11) being disposed in a series circuit, wherein each connecting device comprising a first input/output unit and a second input/output unit connected thereto by means of a circuit configuration, the second input/output unit comprising at least two connecting plugs each for connecting one electric vehicle and/or an additional connecting device, wherein each connecting plug serving for producing a data connection and/or power connection between the electric vehicle connected thereto and the electrical power supply device, wherein the electrical power supply device being part of a main module for coupling to the charging station and at least one connecting device, wherein the circuit configuration comprising electrically operable switches, particularly contactors, for mechanically establishing the electrical connection, wherein the electrical power supply device being able to bring about actuation of a switch, wherein the main module and at least one connecting device being connected to each other by means of a connecting cable, wherein the connecting cable comprising at least two strands, preferably at least or exactly three strands, wherein conductors running in a first strand and conductors also running in a second strand, the first strand transmitting the charging current, and the second strand serving for communicating and comprising a supply line of a hardware redundancy, wherein the electrical power supply device causing the charging station to preferably continuously provide the charging current to the connecting devices and to deliver the charging current to exactly one connecting plug by actuating the circuit configuration as a function of at least one predefined control parameter, wherein all other switches in the other connecting devices being switched to inactive, whereby only one electric vehicle is charged at a time, wherein the hardware redundancy is made of at least the supply line made of at least two and preferably at least or exactly three conductors running from the main module via/to all connecting devices (10, 11, 110) analogously to the power line of the charging current in the connecting cable (34, 36), a relay (41, 61) in the main module and in each connecting device, a transistor (43, 63) in the main module and in the connecting devices, and a voltage source having a particular current and particular voltage in the main module. a charging device for time-offset charging of a plurality of electric vehicles simultaneously connected to the device, the charging device comprising a charging station for providing a charging current, and the charging device comprising an electrical power supply device, and wherein a plurality of connecting devices (10, 11) being provided for connecting the plurality of electric vehicles, wherein the connecting devices (10, 11) being disposed in a series circuit, wherein each connecting device comprising a first input/output unit and a second input/output unit connected thereto by means of a circuit configuration, the second input/output unit comprising at least two connecting plugs each for connecting one electric vehicle and/or an additional connecting device, wherein each connecting plug serving for producing a data connection and/or power connection between the electric vehicle connected thereto and the electrical power supply device, wherein the electrical power supply device being part of a main module for coupling to the charging station and at least one connecting device, wherein the circuit configuration comprising electrically operable switches, particularly contactors, for mechanically establishing the electrical connection, wherein the electrical power supply device being able to bring about actuation of a switch, wherein the main module and at least one connecting device being connected to each other by means of a connecting cable, wherein the connecting cable comprising at least two strands, preferably at least or exactly three strands, wherein conductors running in a first strand and conductors also running in a second strand, the first strand transmitting the charging current, and the second strand serving for communicating and comprising a supply line of a hardware redundancy, wherein the electrical power supply device causing the charging station to preferably continuously provide the charging current to the connecting devices and to deliver the charging current to exactly one connecting plug by actuating the circuit configuration as a function of at least one predefined control parameter, wherein all other switches in the other connecting devices being switched to inactive, whereby only one electric vehicle is charged at a time, wherein the hardware redundancy is made of at least the supply line made of at least two and preferably at least or exactly three conductors running from the main module via/to all connecting devices (10, 11, 110) analogously to the power line of the charging current in the connecting cable (34, 36), a relay (41, 61) in the main module and in each connecting device, a transistor (43, 63) in the main module and in the connecting devices, and a voltage source having a particular current and particular voltage in the main module.