This part of IEC 60086 is intended to standardize primary batteries with respect to dimensions, nomenclature, terminal configurations, markings, test methods, typical performance, safety and environmental aspects. This standard on one side specifies requirements for primary cells and batteries. On the other side, this standard also specifies procedures how requirements for these batteries are to be standardised. As a classification tool for primary batteries, this standard specifies system letters, electrodes, electrolytes, and nominal as well as maximum open circuit voltage of electrochemical systems. The object of this part of IEC 60086 is to benefit primary battery users, device designers and battery manufacturers by ensuring that batteries from different manufacturers are interchangeable according to standard form, fit and function. Furthermore, to ensure compliance with the above, this part specifies standard test methods for testing primary cells and batteries. This standard also contains requirements in Annex A justifying the inclusion or the ongoing retention of batteries in the IEC 60086 series.