An apparatus for connecting an electric vehicle to an electrical socket and for selectively receiving and delivering either level I voltage or level II voltage, comprising: a first socket connector configured to couple with the electrical socket providing either level I voltage or level II voltage; a power conduit having a first end connected to the first socket connector and configured to convey a voltage from the electrical socket to the electric vehicle, the power conduit configured to deliver either the level I voltage or the level II voltage, wherein the power conduit comprises two conduits (L1, L2) for power supply; a relay placed to bridge segments of the power conduit and configured to control voltage along the power conduit; a control circuit connected to the power conduit and configured to generate signals corresponding to the voltage along the power conduit, wherein the signals indicate whether the voltage is the level I voltage or the level II voltage; a switch connected to the power conduit and the relay, the switch being configured to be controlled by the control circuit in order to provide the level I or the level II voltage to the electric vehicle depending on whether the control circuit indicates the voltage is the level I voltage or the level II voltage, wherein the switch is open in an initial state, thereby causing a disconnect between an unconnected conduit (L1, L2) and the relay, wherein the control circuit is configured to leave the circuit between the unconnected conduit (L1, L2) open when the apparatus is connected to a level I electrical socket, and to close the circuit between the unconnected conduit (L1, L2) and the relay when the apparatus is plugged into a level II electrical socket, wherein when the circuit is closed, the relay is connected to both power supply conduits (L1, L2) of the power conduit to provide the electric vehicle with the level II voltage; a vehicle connector connected to a second end of the power conduit and configured to connect to the electric vehicle to provide one of the level I voltage and the level II voltage; a processor connected to the control circuit and configured to receive signals from and send signals to the control circuit; a voltage monitor connected to the processor; and a display connected to the processor, wherein the level I voltage comprises an alternating current voltage less than the level II alternating current voltage. a first socket connector configured to couple with the electrical socket providing either level I voltage or level II voltage; a power conduit having a first end connected to the first socket connector and configured to convey a voltage from the electrical socket to the electric vehicle, the power conduit configured to deliver either the level I voltage or the level II voltage, wherein the power conduit comprises two conduits (L1, L2) for power supply; a relay placed to bridge segments of the power conduit and configured to control voltage along the power conduit; a control circuit connected to the power conduit and configured to generate signals corresponding to the voltage along the power conduit, wherein the signals indicate whether the voltage is the level I voltage or the level II voltage; a switch connected to the power conduit and the relay, the switch being configured to be controlled by the control circuit in order to provide the level I or the level II voltage to the electric vehicle depending on whether the control circuit indicates the voltage is the level I voltage or the level II voltage, wherein the switch is open in an initial state, thereby causing a disconnect between an unconnected conduit (L1, L2) and the relay, wherein the control circuit is configured to leave the circuit between the unconnected conduit (L1, L2) open when the apparatus is connected to a level I electrical socket, and to close the circuit between the unconnected conduit (L1, L2) and the relay when the apparatus is plugged into a level II electrical socket, wherein when the circuit is closed, the relay is connected to both power supply conduits (L1, L2) of the power conduit to provide the electric vehicle with the level II voltage; a vehicle connector connected to a second end of the power conduit and configured to connect to the electric vehicle to provide one of the level I voltage and the level II voltage; a processor connected to the control circuit and configured to receive signals from and send signals to the control circuit; a voltage monitor connected to the processor; and a display connected to the processor, wherein the level I voltage comprises an alternating current voltage less than the level II alternating current voltage.