I nsearchine the Internet for the "A" battery I found that there are
curreently in production Twelve Standard Sizes of single cell batteries.
They are in Increasing size order, AAAA, AAA, AA, A, SC(Sub C, C, D, F,
Super F, G, J, and #6  

I did some further checking on those "Crank Telephone" Batteries I
mentioned previously and they are a  "#6" Battery IAW the curent Battery
Shape/Size Standards.

I also found out some other interesting Size Data.
There are 7 Variations(same Diameter shorter Height) of the "AAAA" Battery,
20 Variations of the "AAA" battery, 9 Variations of the
"AA" Battery, 7
Variations of the "A" battery, 7 Variations of the Sub
"C" battery, 4
Variations of the "C" Battery, and 4 Variations of the
"D" battery.

Some sizes also come in "Flat" Versions, Same MaH as it's counter part
except for a rectangular shape instead of round
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