I noticed that there are no B batteries. I think that's to...

I noticed that there are no B batteries. I think that's to avoid confusion, cause if there were you wouldn't know if someone was stuttering. 'Yes, hello I'd like some b-batteries.' 'What kind?' 'B-batteries.' 'What kind?' 'B-batteries!' and D-batteries that's hard for foreigners. 'Yes, I would like de batteries.'