Abstract: An automatic electric charger connectable with a number of electric appliance for providing electric power to the appliances is disclosed as including an RF transceiver for receiving data representing charging and/or powering parameters of the appliances; an I/O unit electrically connected with an electric power source for receiving electric power therefrom, and electrically connectable with the appliances for transmitting electric power thereto; in which the I/O unit may vary, in accordance with the received data, the voltage of the electric power received from the electric power source for subsequent transmission to the appliances.