A D battery (D cell or

IEC The International Electrotechnical Commission (IEC; in French: ''Commission électrotechnique internationale'') is an international standards organization that prepares and publishes international standards for all electrical, electronic and r ...

R20) is a standardized size of a

dry cell upLine art drawing of a dry cell: 1. brass cap, 2. plastic seal, 3. expansion space, 4. porous cardboard, 5. zinc can, 6. carbon rod, 7. chemical mixture A dry cell is a type of electric battery, commonly used for portable electrical devices. Unl ...

. A D cell is cylindrical with an electrical contact at each end; the positive end has a nub or bump. D

cells Cell most often refers to: * Cell (biology), the functional basic unit of life Cell may also refer to: Locations * Monastic cell, a small room, hut, or cave in which a religious recluse lives, alternatively the small precursor of a monastery w ...

are typically used in high current drain applications, such as in large

flashlight A flashlight (American English, US, Canadian English, Canada) or torch (British English, UK, Australian English, Australia) is a portable hand-held electric lamp. Formerly, the light source typically was a miniature incandescent light bulb, b ...

radio receiver In radio communications, a radio receiver, also known as a receiver, a wireless, or simply a radio, is an electronic device that receives radio waves and converts the information carried by them to a usable form. It is used with an antenna. Th ...

s, and

transmitters In electronics and telecommunications, a radio transmitter or just transmitter is an electronic device which produces radio waves with an antenna. The transmitter itself generates a radio frequency alternating current, which is applied to the ...

, and other devices that require an extended running time. A D cell may be either

rechargeable A rechargeable battery, storage battery, or secondary cell (formally a type of energy accumulator), is a type of electrical battery which can be charged, discharged into a load, and recharged many times, as opposed to a disposable or pri ...

or non-rechargeable. Its terminal voltage and capacity depend upon its cell chemistry. The National Carbon Company introduced the first D cell in 1898. Before smaller cells became more common, D cells were widely known as ''flashlight batteries.'' The U.S. military designation for this battery has been BA-30 since sometime before World War II. During World War II, it was designated the Type C battery by the U.S. Navy, leading to confusion with the smaller C cell battery (BA-42). In 2007, D batteries accounted for 8% of alkaline

primary battery A primary battery or primary cell is a battery (a galvanic cell) that is designed to be used once and discarded, and not recharged with electricity and reused like a secondary cell ( rechargeable battery). In general, the electrochemical react ...

sales (numerically) in the US. In 2008, Swiss purchases of D batteries amounted to 3.4% of primary and 1.4% of secondary (rechargeable) sales. 6 most common battery types-1

Dimensions and capacity

Names

Common

Other

* U2 / HP2 / SP2 UK * Type 373

Russia Russia (, , ), or the Russian Federation, is a transcontinental country spanning Eastern Europe and Northern Asia. It is the largest country in the world, with its internationally recognised territory covering , and encompassing one-ei ...

* MN/MX1300 * Mono * Goliath * BA-30 US WWII * #1

China China, officially the People's Republic of China (PRC), is a country in East Asia. It is the world's List of countries and dependencies by population, most populous country, with a Population of China, population exceeding 1.4 billion, slig ...

* UM 1 JIS * 6135-99-464-1938 / 6135-99-109-9428 ( NSN) * Flashlight Battery / Torch Battery * B006 (NiMH) * Torcia

Italy Italy ( it, Italia ), officially the Italian Republic, ) or the Republic of Italy, is a country in Southern Europe. It is located in the middle of the Mediterranean Sea, and its territory largely coincides with the homonymous geographical ...

* Góliátelem

Hungary Hungary ( hu, Magyarország ) is a landlocked country in Central Europe. Spanning of the Carpathian Basin, it is bordered by Slovakia to the north, Ukraine to the northeast, Romania to the east and southeast, Serbia to the south, Cr ...

* Pilão Gostoso

Brazil Brazil ( pt, Brasil; ), officially the Federative Republic of Brazil (Portuguese: ), is the largest country in both South America and Latin America. At and with over 217 million people, Brazil is the world's fifth-largest country by area ...

* Pila Grande

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* Kalın Pil

Turkey Turkey ( tr, Türkiye ), officially the Republic of Türkiye ( tr, Türkiye Cumhuriyeti, links=no ), is a transcontinental country located mainly on the Anatolian Peninsula in Western Asia, with a small portion on the Balkan Peninsula ...

* Monočlánek / "Buřt" Czech

Battery capacity and size

A battery's capacity depends upon its cell chemistry and current draw. Duracell brand rates its alkaline D cell performance as approximately 20,000

mAh ''Mångha'' (') is the Avestan for "Moon, month", equivalent to Persian ''Māh'' (; Old Persian ). It is the name of the lunar deity in Zoroastrianism. The Iranian word is masculine. Although Mah is not a prominent deity in the Avestan scrip ...

at 25 mA draw, but about 10,000 mAh at 500 mA draw. This effect is generally less pronounced in cells with NiMH

chemistry Chemistry is the scientific study of the properties and behavior of matter. It is a natural science that covers the elements that make up matter to the compounds made of atoms, molecules and ions: their composition, structure, proper ...

and hardly at all with NiCd. Many commonly available size D rechargeable cells are actually sub-C cells in a D-sized holder. D batteries have nominal diameter of 33.2 ± 1

millimeters 330px, Different lengths as in respect to the electromagnetic spectrum, measured by the metre and its derived scales. The microwave is between 1 meter to 1 millimeter. The millimetre (American and British English spelling differences#-re, -er, ...

(1.3 inches). The overall length is 61.5 millimeters (2.42 inches).IEC 60086-2 §7.1.4

References

External links

Duracell D Size Battery Specification

Energizer D Size Battery Specification for Alkaline Cell

Brand Neutral Drawing Of NiCd D Battery Based On ANSI Specifications

Brand Neutral Drawing Of NiMH D Battery Based On ANSI Specifications

Brand Neutral Drawing Of Alkaline D Battery Based On ANSI Specifications
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