How Much Current Can a D Battery Supply?

Different types of batteries
  • 1 hours
  • Beginner
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What You'll Need
Zinc-Carbon D battery
1.5 VDC 6 Watt load (eg. light bulb)
What You'll Need
Zinc-Carbon D battery
1.5 VDC 6 Watt load (eg. light bulb)

A battery, such as a D battery, is a device that generates electrical energy. Batteries are convenient portable sources of energy. Unlike other energy-conversion devices, batteries contain no moving parts. Batteries convert chemical energy into electrical energy by means of a chemical reaction.

Amount of Current

A standard D-size carbon-zinc battery has an Ah (amp-hour) capacity of approximately 4.5 to 8 Ah (4500-8000 mAh). This means that a D battery could supply 6.25 amps of current for about one hour, more or less. This can also be calculated as the D battery supplying a current of 1 amp for about 6 hours, or any other combination with this same formula.

Just to permit a comparison of the different types of the same D size batteries, an Alkaline battery of the same size is rated at between 12000 to 18000 mAh, NiCd is rated at about 2000 to 5500 mAh, and NiMH at about 22000 to 120000 mAh.

Amperage Guideline


You should keep in mind though, that this is only a guideline. If you are running the D battery at a maximum current of 4.5 amps, the amount of heat would cause the battery to lose part of its chemical reaction, causing it to be fully discharged before the one hour span. The same is true for an extremely light load as well. For example, if the battery was connected to a load of just 1 milliamp, it would give current for 4,500 hours. But, more than likely, evaporation of the chemicals needed for the reaction would also cause the battery to lose charge before the 4,500-hour mark.

D Battery FAQ

What is the power of D size battery?

All standard D batteries output 1.5 volts of energy, which is on par for batteries. Along with D batteries, C, AA, and AAA batteries all put out 1.5 volts of energy.

Do D batteries have more power?

Compared to other batteries, for example the standard AAA battery, D batteries do not put out more energy but they do deliver energy for much longer. So while D batteries do not deliver more power in any given moment, they will last much longer, on average, than many other types of batteries.

What is the advantage to D batteries?

Because D batteries are large, they can provide a lot of power to devices, even those with a high power drain.

What batteries hold the most power?

Various research shows that lithium batteries last for up to six times longer than more familiar alkaline batteries.

Is there a difference between D cell and D batteries?

All D batteries are also D cell batteries, which simply means dry cell.