What is the difference between AA and AAA batteries?

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  • #1
What is the difference between AA and AAA batteries? Will the output voltage of 3 AAA and 4AA be same?
 

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  • #2
anorlunda
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Yes. They have the same voltage, but AA batteries store more energy than AAA.
 
  • #3
Ok.thank you
 
  • #4
CWatters
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What is the difference between AA and AAA batteries?

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


Will the output voltage of 3 AAA and 4AA be same?

No. The voltage of 3AAA will be around 4.5V and 4AA will be around 6V.
 
  • #5
davenn
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Jumping onto his thread for a question I had, will AA batteries output more current than AAA will?
 
  • #7
russ_watters
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No. The voltage of 3AAA will be around 4.5V and 4AA will be around 6V.
Caveat being that the OP didn't specify series or parallel wiring, so we can't be sure which is the right answer.
 
  • #8
russ_watters
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Jumping onto his thread for a question I had, will AA batteries output more current than AAA will?
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.
 
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  • #9
meBigGuy
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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
https://en.wikipedia.org/wiki/AA_battery
http://data.energizer.com/PDFs/E91.pdf
AAA (50ma draw) 860–1,200 mAh
https://en.wikipedia.org/wiki/AAA_battery
http://data.energizer.com/PDFs/E92.pdf

The max current capability will be more for a AA given the same battery family (technology and "style")
 
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