Olight I3S (1xAAA), great little flashlight, was thinking to move up to something 1xAA, because here AA`s are more easy to find.
What are your thoughts about 1xAAA vs 1XAA?
It is important to be able find/have batteries, obviously. Perhaps Eneloop (or similar) rechargables might be something for you to look into. As to whether AA or AAA is better...that depends on you. How big of a light/what type of form factor do you want to carry? What kind of runtime would you want? How much output do you require?