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What is the difference between AA and AAA batteries?

  1. Jan 18, 2016 #1
    What is the difference between AA and AAA batteries? Will the output voltage of 3 AAA and 4AA be same?
  2. jcsd
  3. Jan 18, 2016 #2


    Staff: Mentor

    Yes. They have the same voltage, but AA batteries store more energy than AAA.
  4. Jan 18, 2016 #3
    Ok.thank you
  5. Jan 18, 2016 #4


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    Physical size and energy storage capacity. The voltage on light loads will be the same = 1.5V for alkaline cells.

    No. The voltage of 3AAA will be around 4.5V and 4AA will be around 6V.
  6. Jan 18, 2016 #5


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    as will 4 AAA 's
  7. Jan 18, 2016 #6
    Jumping onto his thread for a question I had, will AA batteries output more current than AAA will?
  8. Jan 18, 2016 #7


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    Caveat being that the OP didn't specify series or parallel wiring, so we can't be sure which is the right answer.
  9. Jan 18, 2016 #8


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    More total energy for sure, more current probably -- that's a function of internal resistance of the battery, which should be lower for the AA.
  10. Jan 18, 2016 #9


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    Depends on the battery technology, so let's talk alkaline.

    The difference between AA and AAA alkaline batteries is the physical size and the capacity, generally measured in milliamp-hours.
    The range varies depending on the manufacturer and the battery line.
    AA (50ma draw) 1800–2600 mAh
    AAA (50ma draw) 860–1,200 mAh

    The max current capability will be more for a AA given the same battery family (technology and "style")
    Last edited: Jan 19, 2016
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