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D / R20 batteries

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"Finger" battery markings

The types of batteries popular on the market can be divided into three basic product groups due to their shape and proportions. The smallest batteries, i.e. button batteries (also referred to as button batteries), have the shape of a cylinder with a diameter much larger than the length - e.g. the popular CR2032, with a diameter of 20 mm, is only 3.2 mm thick. Their manufacturing technology allows for the use of, among others, in devices such as glucometers. In addition, they are perfect as a power supply for hearing aids.

The second group are cylindrical batteries with a diameter (usually) several times smaller than the length. This group includes the most popular classic batteries ( R6) and small ones (R03), as well as smaller batteries (e.g. CR123) and larger ones (R14 or R20). The remaining batteries are mainly rectangular models - 9-volt 6F22 or the famous 4.5 V flat batteries, often used in old flashlights.

Powerful R20 alkaline batteries – huge capacity and "right" dimensions

R20 batteries (in the alkaline version - LR20) are also abbreviated as D (D R20). Powerful alkaline batteries (alkaline cells) are characterized by universal use and stable operation even in the case of high energy consumption. Although their market share is currently quite small, despite the popularization of lithium-ion or lithium-polymer batteries, R20 cells are still irreplaceable in many applications with high energy demand. One of the classic uses for D-cell batteries is in larger handheld flashlights, although they can still be found in some electronic toys as well. Due to the possibility of stable and efficient power supply of current receivers with relatively high energy demand, the R20 battery is used, among others, for professional use. A high series of batteries of this type means not only the highest quality, but above all, increased resistance to external conditions.

Another group of applications are portable radio players - the so-called boomboxes - which, due to the often high musical power and the need to ensure a long operating time, require a power source with a really large capacity.

Solid alkaline batteries available at the Botland store

Our offer includes R20 batteries from a renowned manufacturer - Varta. R20 Varta Longlife Power batteries have a huge capacity of 16,500 mAh (16.5 Ah) and standard dimensions (58 x 33 mm) and a voltage of 1.5 V. They are sold in sets of 2 pieces. For particularly demanding applications, e.g. work in difficult environmental conditions, we recommend super-strong R20 Varta Industrial alkaline batteries with even higher capacity (capacity approx. 17,000 mAh. The operating temperature range of these batteries is -10 to +50 oC, which allows for use, among others, in tourist flashlights

The Industrial Pro industrial battery and other products of this type available in our store are characterized by universal use. The Varta brand offers proven and reliable alkaline batteries. Do you have additional questions about our offer? We encourage you to contact us by e-mail, telephone or via the contact form.

D (R20) batteries - FAQ

Among the R20 size batteries, we especially recommend alkaline cells marked with the abbreviation LR20 - they provide high capacity, which allows for long-term operation of the devices powered by them. An excellent choice will be industrial-class batteries - LR20 Varta Industrial Pro Alkaline - with a capacity of up to 17,000 mAh!

The LR20 battery is an alkaline variant of the "ordinary" R20 cell. Although both types of batteries have identical dimensions and rated voltage (1.5 V), however, they differ in the type of chemical reagents and, consequently, in their electrical parameters. Alkaline cells are perfect for demanding applications, such as high-power flashlights .