| D Batteries |
A D battery or D cell is a size of dry cell. A D cell is cylindrical with electrical contacts at each end; the positive end having a nub or bump. D cells are typically used in high current drain applications, such as in large flashlights, radio receivers and transmitters, portable entertainment systems, products with motors, safety systems or other applications requiring extended run time. Rechargeable and non rechargeable cells are made in the D cell size, with terminal voltage and capacity varying depending on the cell chemistry.
The alkaline D cell was standardized by ANSI as "13A" and is known internationally as LR20. The 13D is based on carbon-zinc chemistry, the 13D is marketed as a Heavy Duty cell. The standard D cell has a length of 60.5±1.0 mm (2.38±0.04 in) and a diameter of 33.1±1.0 mm (1.31±0.04 in). |
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9V Batteries 
