Varta Industrial Alkaline D (4020) batteries are now available in a box of 20. These Varta industrial alkaline D batteries are bulk packed and therefore ideal for end-users putting them directly into the equipment. Ideal for engineers replacing batteries in equipment. Used in all types of industry including sound and vision, TV & theatre, hygiene, schools & colleges. The D size 1.5V battery also known as LR20 MN1300 4020 Mono has the Varta Part No. 4020 211 111. Voltage 1.5V Diameter 34.2mm Height 61.5mm. See the full range of Varta Industrial Alkaline Batteries here.