AAA cell vs. D cell

This question has been bugging me for a while now. What's the difference between a 1.5v AAA cell battery and a 1.5v D cell battery? Why is the D cell bigger? Is that just for weight, or does have more resistance, like it lasts longer? Why is one better? Thanks!

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Bran (author) 10 years ago
Ah, thanks. That'll help a bunch.
jarv3410 years ago
an alkaline AAA cell is rated at about 624mAh where a D is 20500mAh, so for a device that sinks the same current it will last about 30 times as long with D.

acer7310 years ago
Like tool said the larger the battery the more chemicals it can store
capacity, more chemicals=longer output
teaaddict31410 years ago
a D batter lasts WAY longer than a AAA