eli5 What makes a AAA battery different from a AA battery other than it being smaller? What’s the actual difference ?

Question

eli5 What makes a AAA battery different from a AA battery other than it being smaller? What’s the actual difference ?

In: Technology

Answer 1

The only difference between an AA and AAA battery is the size – because the AA battery is larger, it holds more of the chemistry that makes a battery work. The more chemistry it contains, the more power it stores and the longer the battery will last in use before it runs out.

A C or D cell battery is also exactly the same as an AA cell, just even bigger, and while pretty rare, you can get things like AAAA batteries that are even smaller versions of a AAA (these are often found making up 9v batteries – 6no 1.5v AAAA batteries wired in series to make one larger 9v battery).

Not all batteries are the same though – if you look at a CR2 or CR123 battery for example, these use different designs and chemistries to produce different voltages suitable for other uses.