Low voltage warning would be nice. Maybe a flash every 5 seconds when the under load voltage of the cell is 1V?
Personally, I’m not interested in a LiIon compatible light. ( doesn’t a wider input voltage range mean lower efficiency on top of the not-so-efficient boost driver?)
An optional 1AA extension tube might be useful.
Probably not off the shelf so a custom, but we do have to keep costs down gathering from the prices people want to pay and the fact that we're not a massive high volume manufacturer.
Custom is what i wanted to hear, i do hope it will have high efficiency (many AA drivers seem to have 40-60% efficiency), constant brightness and 500mA to 1000mA turbo 
Instead of HA3… how about HA2 and give us some of the cool colors that Maglite uses.
Always start on Moonlight.
No strobe, not even hidden.
No visible PWM (or current controlled)
No loctite!
Nichia 219
Don’t care about 14500
Twisty
TIR optic (like the Fenix E05) would be nice.
My take:
Good output for Nimh, and regulated well
High efficiency
3-4 modes, any strobe should be hidden
Easy access to low/high
Tailstanding
Bonus:
Provide an extension tube for 2xAA
Price: $40
Does sound alot like the Olight S15 and Thrunite Neutron 2A V2 
Calvin, why not provide a form (from google) and list the options in selectable fields. Would be much easier for all of us!
Looking over the above posts, that table will be evenly covered with check marks, the wishes are all over the place
It would be easier to digest for him. Google forms will provide the statistics…
Modes: moon (~0.25 lumens), low (~5 lumens), med (~30 lm), high (100+ lm)… I don’t really care much about dual AA+14500 support, but if it allows both the modes should be the same output with either battery type (with an extra turbo mode added on 14500).
Memory: none, or at least, has an easy way to access moon from off no matter what state it was in before
A Nichia 219B with a floody TIR optic sounds awesome. Or perhaps a reflector with a frosted lens. High-CRI neutral-to-daylight white with a smooth, floody beam.
It’d be awesome if the body could be bare brass or stainless steel. A screw-on clip would be nice too (don’t care if it’s reversible as long as it can work in a bezel-down deep carry fashion). Hopefully small overall, like a L3 L10 or D25A.
Ideally, it would be a twisty, or a twisty with a button so that either one could be used (Thrunite T10S for example). Or an e-switch, since that offers lots of interesting UI options.
Constant-current output is ideal, but fast PWM (~18000 Hz) is okay too.
Moddable is good. Ideally, I’d love to be able to pull the driver out and reflash the firmware. I like to put a bunch of weird modes on my EDC and otherwise generally mess with the interface.
I’d be willing to help create the firmware, as long as it can be open-source. So far I’ve only done attiny13 firmware, but am open to other MCUs too.
Edit: So, BLF has a pretty lively community for modding 1x18650 lights, with lots of readily-available hosts and parts for building pretty much anything. The Convoy S series is a good example, and anything else which uses the same-sized components. But that doesn’t really happen for 1xAA or 1x14500 lights due to lack of parts. What I’d really like is to have the same degree of mod components available in a 1xAA form factor as what we currently have for 1x18650 lights.
i want some mini size ,low lights ,long-lasting and
bright ,power-saving .
The bike guy wants some form of strobe (preferrably low-hz) ;)
Off-Topic: I will get myself more of those decals.
All the things above, but which will be the style? If possible to have some details?
If I can choose, I’ll a flashlight AA/14500 with the same style of the famous C8, but obviously smaller. The work of the guys with Jax Mini C8 is super! (but it run with 1x18650). I think a lot of people here (me first) dribble down for a mini C8/14500 :bigsmile:
(and you would sell a lot of it!)
You could also build a bike light. A Convoy S-series with diffuser film works well as a handlebar light, or you can make a little 16340-based tail light as described here:
As for flashy modes, that’s a pretty simple matter of adding it to the firmware. I have a few blinky modes in the version I published, specifically for biking purposes.
Hi,
Since you are planning a screw-in pill, how’s about offering at least a couple of different pills with different drivers?
Also, if you do that, can you also offer an extension tube to make it into a 2xAA / 2x14500 light?
That way, you could provide a pill/driver with a buck driver and an extension tube to make a very bright 2x14500 light!
working on a Google doc, be back in a few hours…
Put a strobe in and I'll come hunt you down and .......
stop buying from you forever
Haha, I like strobes. Not tactical strobes, though. I just think it’s fun to have a nice motion-freezing ~20Hz strobe so I can watch life as a series of still frames. 
But I don’t expect that to be included stock; I’m just hoping it’ll be moddable so I can give it new firmware.
Done, the spreadsheet is HERE.
EDIT: oops forgot to made it so anyone can edit
Also of note: fdr2164 did a “mindmap” of 1xAA lights, and 2xAA lights. they are old, and do not list every single model, but they are a very good start
Thanks for your work musicmagic. The project is a bit more complicated than I originally anticipated with a high MOQ requirement, so we'll be gathering funds while going through the design process and figuring out what is viable at given price points. I'll post more information when things become more concrete.
It should be a zoomy, with shape knurling and finish comparable to an SK-58, or more curves, no plain cylinders. It should have either compact size or high power, and good heat flow for its size: direct star, solid pill contacting thickest walls of body. It should be either for AA or for 14500, because boost drivers make it too easy to over-discharge lithium ion cells.
If you don’t have enough time of a very talented numerical control lathe programmer, you should contract for an existing outer part and upgrade the inner parts.