A prismatic electric power cell has two flat current conductors, which project substantially perpendicular from one of the outer surfaces of the cell and which are arranged substantially plane-parallel to each other. The current conductors each have at least one hole in the direction of the surface normal thereof, wherein the hole pattern of one current conductor is mirror-symmetrical to the hole pattern of the other current conductor. The invention further relates to an electric power unit which has a plurality of the electric power cells.