Utility AAA?
I am assuming you are talking about a tool version of an AAA light. For me, that is the Peak Baltic with HA-III aluminum or stainless steel. Mine is the SP (highest level) output with SSC LED, HA-III with the tail ring removed and covered with on of their optional stainless plugs.
It resides in the small pockets on the side of my Leatherman Charge Ti holster, runs on Eneloop rechargables, takes a beating and eats batteries. If I really need another battery, I just pull one out of my keychain light and press on.
I have had Arcs, L0D Q4, LF2X, Kaidomain AAA and the Baltic works the best for utility. Second place for utility is the L0D Q4. I have a E01 on backorder since the LF2X disconnected itself from my keychain
my sons lost the L0D Q4
and I cracked the lens on the Kaidomain
I have a lithium AAA waiting for the E01 and am hopeful it will remain on my keychain a long time.
For me, having a high output Baltic in the LM Charge holster and a low output/long runtime E01 on the keys should keep my needs covered. My Arc AAA red LED is the light for blackout...
I like Arcs, Fenix and Peak lights... guess I can't join the Church of Arc, Temple of Fenix or the Cathedral of Peak.
Can't we all just get along? (All hail choice!)