D batteries are a battery typically used in high drain applications like products with motors, motion, heat, cars, or requiring extended run time.
The D battery type was standardized by ANSI as "13A" (alkaline) and is known internationally as LR20 (alkaline) or 13D (carbon-zinc).
Introduction
A Duracell D battery in a battery holder.
D sized batteries are composed of a single chamber and are more correctly referred to as a cell. The normal output voltage of single-used D batteries is 1.50 volts, while NiCd and NiMH rechargeable batteries have a nominal voltage of 1.20 V. Specialty batteries based on more unusual chemistries can run at a voltage as high as 1.6 V under load. The voltage of a D battery is the same as an AAA, AA or C cell, however, they can supply current longer, i.e. they store more energy, than C batteries.
Capacity
Because of their larger size, which allows them to store a more powerful and greater mass of anode material (an electrode that is consumed as it does electrical work), the D sized battery can supply power for a longer time than other batteries.
In some cases, rechargeable D batteries have significantly less capacity (as low as 1,800 mAh) than the disposable kind because they are internally only an AA cell. Many, however, are made as true D cells with greater capacities than their alkaline counterparts and any C or AA battery.
| Battery type |
Typical capacity in mAh |
| AA |
2,400 |
| C |
7,800 |
| D |
12,000 |
See also
External links
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