Mike:
That is what's so great about these forums like ezone & universe
. Read,study, ask questions and learn from experience of others.
I had been into RC electrics since '78' but I've learned more in the
past 1 1/2 years reading ezone. Back to your quest. about AE. --
the hot rod of flight packs were the 500 or 600 AR's The letters
denote both size and rating to take in charge and dump rate.
You have AAA, AA, A , 4/5 C. When you look-up a battery sales
chart like from Tower, you will see AU, AE etc. Maybe someone
with tech. info can answer this better than I.

Randy