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D battery

D batteries are a electrochemical cell typically used in high current drain applications in products with motors, radio receivers and transmitters, portable entertainment systems, other electronics, flashlights, safety systems or those applications requiring extended run time. Non rechargeable cells are known as primary cells and are generally not recharged after use.

The D cell was standardized by ANSI as "13A" (alkaline) and is known internationally as LR20 (alkaline). The 13D is based on carbon-zinc chemistry, the 13D is marketed as a Heavy Duty cell. The standard D cell has physical dimensions of 60.5 mm (2.38 in), +/- 1.0 mm (0.039 in), in length overall with a diameter of 33.2 mm (1.31 in), +/- 1.0 mm (0.039 in).