The use of plastic materials for battery containers has now been developed to include batteries for passenger cars. Methods for bending containers and covers are described, as well as a test for bottom hold-down. The possibility is discussed of reducing installation costs by use of a flat terminal. It is recommended that the starting power of a battery be indicated by an addition to its designation. Views on life test and self-discharge are presented; also, a numerical designation system to aid the customer who wishes a replacement.