This part of IEC 60254 is applicable to lead-acid traction batteries used as power sources for electric propulsion. The object of the present standard is to specify - the maximum external (overall) dimensions of traction battery cells, that is, the width, the height and the length; - the form of the marking of traction battery cell polarity and dimensions of corresponding symbols; - the basic dimensions of some commonly used traction battery terminals designed to connect output cables to the battery; - the dimensions of cells commonly used in Asia and North America.