I have a number of 1xAAA lights, and as you might imagine, I have opinions about them.

  • Fenix E01 -- Very inexpensive, bulletproof, long runtime. Output isn't bad, beam tint varies from poor to awful. I have them practically everywhere.
  • ThruNite Ti -- Same price point as the E01 and same runtime on low (or even more with the Moonlight version) but also has the capacity for significantly more output if needed. I'd rather have the Ti over the E01 for the beam tint even if I don't need the multiple output levels. It's a bit hard to get it to turn on in low (or moonlight) mode without accidentally overrunning it and going to high, which can have a negative impact on your night vision.
  • Preon ReVO -- Other than the fact that it isn't made any more and has a much higher price point, for me it's the perfect AAA light. All the runtime of the E01 and Ti but with several output modes. It's also noticeably smaller, has "hidden" disco modes if you want those, has the best keyring attachment point I've ever seen on a AAA. If you can find one, get it.
  • Preon 1 -- Not quite as small as the ReVO, but with similar runtime and output options. It's also less expensive and in current production. I like mine a heck of a lot.
  • Fenix E05 -- I don't have one of these. Everyone seems to like them a lot, and at the price point difference between this and the E01 I would definitely get the E05. Between the E05 and the Ti, for myself I'd rather have two output levels than one. If you want a single level, inexpensive AAA with a nice tint, I'd say it can't be beat.
  • Klarus Mi series -- I don't have any of these. I hear good things about them, and if you're looking for a high-performance AAA very much like what the ReVO was, I'd suggest you look into it.