Batteries covered by this performance specification are intended primarily for starting, lighting, and ignition service in military vehicles of all types, internal combustion engine driven industrial trucks and tractors, construction equipment and generator sets. The batteries will also be used for radio operation and as a source of electrical energy for operating vehicular accessories, such as sighting and target ranging devices and control mechanisms. The battery's size and shape is controlled by a NATO Standardization Agreement (see 6.7), and batteries of this form factor are uniquely used by the military.