Abstract: The protector has two ends connected to a central portion, these ends being hollow and each suitable for covering one of the two terminals of two contiguous cells of the battery, the central portion being hollow and being able to cover the connection or strap between said terminals, the upper surfaces of said ends having openings or gaps separated by strips of material, the upper surface as well as the side surfaces of said central portion also having openings or gaps separated by strips of material. The area of said openings or gaps is about twice as great as that of the total area of the strips.