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Evelynia 0 8	D Battery 5/5/2022 10:40:14 AM
	A D battery (D cell or IEC R20) is a dry cell of standardized size. A D cell is cylindrical and features an electrical contact at either end, with a nub or bump on the positive end. D cells are commonly used in high current drain applications such as big flashlights, radio receivers and transmitters, and other devices that require a long operating period. D cells can be rechargeable or non-rechargeable. Its terminal voltage and capacity are determined by the chemistry of its cell. In 1898, the National Carbon Company introduced the first D cell. D cells were popularly recognized as flashlight batteries until smaller cells became more common.

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