why are there different sized batteries (aaa-D, etc) if they all put out the same 1.5v?
In: 394
The electrical charge capacity is larger with a larger battery.
For alkaline batteries, it is around
* AAA 1,200mAh
* AA 2,400mAh
* C 8,000mAh
* D 12,000 mAh
If you power a device that draws 1.2 amp then a AAA would last 1 hour, a AA 2 hours, C 5.6 hours, and D 10 hours.
The main drawback of large batteries is that they are physical, larger, and heavier. Batteries also age and can leak so it is not necessarily a good idea that put in a battery in a device that would last 10 years if it did not fail.
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