I've noticed that I suddenly have a lot of AA battery powered photo gear.  There's the A95 which serves as my light/flash meter and photographic sketchpad that takes 4 AA batteries.  There's 2 
Sunpak 383 Supers and a 1 Sunpak 144PC, and each one takes 4 AA batteries.  There's the kinda cruddy 
Sunpak Digital Flash that is now just used to trigger slaves off of my RB67 that takes 2 AA batteries.  Finally, there's the 
Quantaray QS-1 that takes 2 AAA batteries