I was wondering why they came up with the sizes on the batteries like they did? like aa, aaa, c, d, what happend to sizes A and B?

This message has been edited. Last edited by: DorianGreyed,

AA, AAA, C, D, etc. cell batteries are part of a naming system devised by the American National Standards Institute (ANSI). The simple answer is that no one (in the US) makes products that use B cells anymore, and very few make products that use A cells.
Here's a list of standard sizes:

Name - diameter x length (inches) - weight (grams)  
A    - 5/8      x 1 7/8           - 0.046 
AA   - 17/32    x 1 7/8           - 0.033
AAA  - 0.41     x 1.75            - 9.7
AAAA - 0.327    x 1.673           - 6
B    - 3/4      x 2 1/8           - 0.077 
C    - 15/16    x 1 13/16         - 0.1 
D    - 1 1/4    x 2 1/4           - 0.22 
E    - 1 1/4    x 2 7/8           - 0.29 
F    - 1 1/4    x 3 7/16          - 0.35
G    - 1 1/4    x 4               - 0.4  

You might see something somewhere about A and B batteries. It is important to realize that A&B batteries are not the same as A&B dry-cell batteries (cells). A, B, & C batteries were used in early battery-powered radio receivers, and were much larger than A, B, & C cells.

[This message was edited by methos5000 on 04-30-03 at 04:15 PM.]