![]() The D-size battery has a higher current output than the AA-size battery. This is when the battery size comes into play. Some electrical gadgets require a lot of current but not a lot of voltage to operate. Voltage and current are the two most significant factors. report this adĪ comparison table is provided below to show which one you require based on your requirements.Ī Comparison Chart AA battery D Battery Nominal Voltage 1.5 volts 1.5 volts Rated Capacity 2.80 mAh Cut-off Voltage 0.8 volts 0.8 volts Rated Load 75 Ohm 39 Ohm Discharge C-rate 0.007 0.0022 Pricing Lower HigherĪctually, it is debatable. When fully charged, the voltage drops to roughly 1V when exhausted. That is to say, the current competence will not be greatly enhanced, but the capacity will be expanded.īoth batteries have the same voltage of roughly 1.5 volts. The only actual difference is the size of the batteries, with AA batteries being significantly smaller than D batteries.
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