AA vs AAA Battery: The Difference Between AA And AAA Batteries

AA and AAA batteries are very popular cylindrical batteries available in various chemistries, each offering different discharge characteristics. AA and AAA batteries differ in size and hence the capacity. In certain situations, using a special battery holder, one may replace AA with AAA batteries, but at the expense of battery capacity.

What are the differences between AA and AAA batteries? Why are AAA batteries a little more expensive than AA batteries even though they give the same output voltage and current ratio?

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