Applies to lead-acid batteries used for starting, lighting and ignition of passenger automobiles and light commercial vehicles with a nominal voltage of 12 V fastened to the vehicles by means of ledges on the long sides of the battery case, two alternative admissible means are specified in Section Three. Specifies: -the main dimensions of starter batteries of four standard series; -the location of the positive and negative terminals with respect to the fastening system; -the dimensions of tapered terminals of starter batteries; -the marking of the polarity.