Yes I understand this part. I’m thinking more about lights like Niwalker BK FA09S that simply cannot accept button tops. I think this was the case with the first batch of Haikelites where flattop GAs were a much better fit than the button tops as well.
I think it’s way too early to look for batteries for this light.
In this stage of design I think the factory should make sure short, 65mm cells, have at least a few mm of compression to account for sagging. Then fit a maximum of maybe 70 to 71mm cells. No need for longer.
Due to the single springs we may not be able to fit both protected and unprotected cells. It will be tricky to get both to fit well.
Since this light uses brass buttons on the positive end, regular old flat tops will make contact just fine. The battery tube does not screw on like the Q8 where the positive terminal needs to be higher than the rest of the cell.
interested. depending on price
Interested, please add me to the list. Thanks!
Didn’t get an answer. Anyone knows if the light would take 17.4V without issues?
Also, would Beacon and SOS be at 8000+lumens, like Strobe?
Interested.
Even with the slightly protruded head, overall length of the cell is no much different from a 30Q.
I have tested UT03 with a few setups:
- Protected Panasonic NCR18650B (translucent insulator) 18650 - 69.8mm
- Protected Panasonic NCR18650B (black insulator) 18650 - 68.7mm
- IMALENT 2600mAh protected 18650 - 68.4mm
- Sanyo NCR18650GA unprotected 18650 - 65.2mm
- Samsung 30Q unprotected 18650 - 64.9mm
From my observation, protected Panasonic NCR18650B (1) is able to make much better contact among all the tested batteries. Tailcap can be tighten without extra effort.
17.4V is already beyond the recommended working voltage but i will find out for you. All output level related questions will be answered once production grade sample is ready.
Current UT03 does accept both protected and unprotected 18650s. However, the connection is far from perfect for unprotected 18650.
I can't deny that there is possibility. These guys are getting much better now. Delivering a substandard light will only hurt their branding in the flashlight trade. I do have fate in them after UT01 and UT02 success.
I need to know price
We have estimated price now. 
17-18$ is ok.
Can you tell that?
Do you think this is an indication that the battery tube is maybe 1 or 2mm too long?
Interested in the light depending on price.
List updated.
interested
Interested depending on price.
A target price has been set. Its a good one. :+1:
Freeme will PM everyone with that info.
Now I can’t wait to see the next sample with all the upgrades to it.
Interested depending on price.