NOVELTY - The cover has a movable flap (1) pivoted, about a horizontal fulcrum pin (6), between a closed position, in which the flap closes an opening (2) formed on a side (3) of a passenger compartment of an electric vehicle, and an open position to allow access to a charging plug (4). The pin is located near an upper edge (2a) of the opening. An upper edge (1a) of the flap is connected to the upper edge of the opening by a flexible and impermeable membrane (8) made of rubber, such that the membrane forms a drain for collecting surface water or run-off rain water when the flap is in the open position.    USE - Cover for covering a charging plug that is utilized for charging a battery of an electric vehicle (claimed).    ADVANTAGE - The upper edge of the flap is connected to the upper edge of the opening by the flexible and impermeable membrane such that the membrane forms the drain for collecting the surface or run-off rain water when the flap is in the open position, thus avoiding the risk of penetration of water into the cover when the flap is in the open position, and hence avoiding the risk of short-circuit at the level of the cover and the risk of electrocution for a user in a simple and effective manner, in case of raining during charging of batteries of the vehicle. The upper edge of the flap is located above the upper edge of the opening, and the flap is located in a horizontal plane, when the flap is in the open position, thus providing better access to the charging plug and better visibility to the user to connect an end of a cable to the charging plug. The cover has aesthetic appearance.    DETAILED DESCRIPTION - The flap has an inner face (1b) provided with a pin (15) made of flexible material such as rubber.    DESCRIPTION OF DRAWING(S) - The drawing shows a side perspective view of a movable flap in an open position.    Movable flap (1)    Upper edge of movable flap (1a)    Inner face of movable flap (1b)    Opening (2)    Upper edge of opening (2a)    Passenger compartment side (3)    Charging plug (4)    Horizontal fulcrum pin (6)    Flexible and impermeable membrane (8)    Pin (15)