In my RRT01 2019 with protected keeppower P1835C2 the gap is about 0,4 - 0,5mm
Edit.
My light has this gap even without battery
Protected 1200mAh Keepower 18350 in 2019 RRT-01 does not close all the way, but it does work and does cover the O ring…:
I can understand how some people would not be happy about that gap though…
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Listen to the Vinh Salesman Spin:
the exposed Brass gives a “very nice cool look” 
Wow. This gap is HUGE. Now I think I’m lucky my KP fits (almost) perfectly.
My 18350 INR KP 1200 mAh fits perfectly. No gap.
maybe measure your protected 18350 battery, and the brass gap when installed, so we have some specifics to compare
fwiw, the Protected Keepower 1200mAh 18350 is supposedly 39mm long (on left)
can you confirm that length?
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the UNprotected is shorter (pictured above on right)
I have the UnProtected Keepower 1200mAh 18350, it is 34.7mm long… a difference of 4.3mm shorter, without the protection circuit.
[quote=jon_slider]
I can understand how some people would not be happy about that gap quote]
Yikes, I wouldn’t want to test it’s water resistance with that gap.
the O ring is still covered… no change in water resistance
the gap does not affect the function of the light, it is a cosmetic issue only
My protected KP 1200mAh is 39mm and unprotected KP 1200mAh is 35,2mm.
The gap is as I wrote in post #755
0,4-0,5mm with and without battery inside.
Btw. Your unprotected KP looks strangely short if believe the HKJ measurements
Interesting. Maybe the threading in the tube is not far enough?
My tube is 53.6 mm in length, the thread goes all the way down to the tapering (9.45 mm).
glad you are able to fit protected 18350 in your 2019 RRT-01, and that the gap is the same either way…
sounds like different copies of the 2019 RRT-01 have different size gaps with protected 18350…
it also sounds like the batteries themselves vary in length, as my 34.7mm vs your 35.2mm unprotected 18350 measurements are clearly different.
In any case, I think we all agree that the 2019 RRT-01 does work with Protected 18350, and does not expose the O ring, even though it does show the brass…
enjoy your lights!
I asked Jetbeam about the hole in the control ring and they said this: “The control ring hole is for put grease into it. It’s not for tritium vial.” Can anyone explain what that means? They don’t need a hole on any other version of the light for the grease. Will this compromise waterproofing, or was that part of the design always on the outside of the waterproof barrier? Will this make it easier to regrease the ring down the road without diassembly?
The control ring has always been open to the elements. Over time they do get dry or gritty and needs cleaned and refreshed.
Grease tends to shed water so it helps a little being water resistant…
there is an O ring that seals the center of the control ring assembly, so even though water could get between the control ring contact faces (where the ball bearing rides), the water cannot get inside the pill.
here are some examples of the O ring seal on various models of magnetic rotaries
red O rings
black O ring on V10r Ti, which is similar to the 2019 and 2020 RRT-01 configuration (ignore the arrows, they are part of a past discussion of where to put grease)
plus locktite that seals the threads. (this is a V10r, also similar assembly as the 2019 and 2020 RRT-01
Nice spinning!
Do I need to email Neal about this or something? Looking at his website I can’t find just the extension tubes listed. I have 3 2019 light’s i’d love 18650 extension tubes for!
Well it works just fine but looks a bit odd to me……
Received from Neal 2020 rrt01. The extension tubes came as part of the stock packaging so i think mainly available with the light??
Also pleasantly surprised by grey anodized. If i were a rocket scientist i could post a darn picture or two.
Also was sent xpl instead of nichia which made the decision whether to emitter swap for me.
Bezel opens to reveal mcpcb ready to extract and swap emitter. That sounds easier that opening older ones? I’m no expert though so don’t exactly know what I’m yakking about…ha ha, my phone put that word in for me… yakking
so sad, I'm trying... to do what shouldn't be too hard...
Posting a dang picture that is
I never did get it to work either. Signed up for free Imgur and been uploading pics there for a few years.
It gives you a link to post your hosted pic.
I see your link now. Just click the insert pic icon in blf and place your link there and set relative width to about 70%.
It’s probably worth contacting Neal. Extension tubes are included with the JETBeam RRT01 Raptor on his website.
He’s charging $5 more if you want an RRT01 without extension tubes. He might end up with some spares but people probably won’t pay more for less…
Tim.