Awesome! Thanks ToyKeeper
Hank is in short supply of the holes. 
I’d really like a 21700-body for my D4S’s. At a reasonable price I think they’d sell like hot cake.
It really wouldn’t take much to make the K1/K9.3 battery tube fit. They’re very close in size and the threads look the same
And if I squeeze hard enough, it works!
Haha
I actually have noticed that no matter what lanyard I use on my 9.3’s or D4SV2’s, it doesn’t sit easily on the tail cap when I set it on a flat surface pointing up at the ceiling. I always have to monkey around with the lanyard to get it to sit flat
Must be pretty recent. I just ordered a D4v2 one month ago, and it has the hole. Not that I have any plans to use it, so hole or not, wouldn’t matter to me.
I see loneoceans show the circuit:
You can see it here https://budgetlightforum.com/t/-/54052/461
loneoceans also post details of the driver
Photo from loneoceans, not taken by me
Anyone have a beam shot of this one? I'd love to see a 2k light next to a CW light
I really like that! Imagining this in one color and the tube a bit shorter, cause it wouldn’t need the charger… Would be really awesome if you ask me.
Short after I had the idea of how nice a 21700 D4S-body would be, it also came to my mind if the K9.3 body would fit the D4S head. Thanks for testing, it’s a little bummer that it doesn’t fit.
Heck, I would even buy another D4S(V2) if there was an option for a 21700 body that fit’s my other D4S’s.
I love the D4S for it’s output and especially for the beam shape. The Ledil Angie-S is by far the best multi-emitter optic I’ve seen so far.
I’m wondering if other D4S(V2) owners would be interested and if Hank would consider offering this.
^ +3
Meaning I would buy two 21700 bodies for my current D4sv2’s and another D4sv2 with that body. I love the idea of having a 21700 body for the D4sv2, WITHOUT charging. So it’d be shorter than the K1 version. Thanks for posting the pic Tmaxx, looks awesome IMO
And I totally agree that the optic look and throw is a major reason I like the light so much.
Oh, and while we’re making a wishlist for Hank, an optional deep carry clip for the new 21700:D4sv2 body would be amazing 
I don’t have a cw light but here’s a beamshot of my E21A 2000K d4v2
Thanks Pug !
I have the 2700K SST-20 version, and I find it too warm for outdoors. Maybe around a campsite (where firelight is the main source of light) would be good. It’s a fantastic tint for indoors, though!
I will get the 2000K to try it out, though I expect it will just be for novelty. It might be nice to avoid blue-light exposure before bedtime.
I find 2700K E21A to be fairly neutral outdoors. I only really notice the light start to get warm at 2200K. I prefer warmer tones outdoors to cut glare walking around others, and to prevent insect attraction.
Although the lumens is lower with these emitters, would you say it is still sufficiently bright outdoors? I’m on the fence with my next kr4 having the e21a (2700k) or the sst20 (2700k).
I have the sst20 2700k in a c8 style thrower and it is plenty bright, so I know 4 of them would defintely be bright. I guess I’m just hesitant thinking the e21a would be less then half the lumens…
Of my 3 K9.3’s, my favorite one for outdoor use is XP-L HI V2 5D 4.000K on CH1
The E21 2700K and 2000K’s are too warm for outdoor use in my opinion
Will the KR4 ti 18350 tube fit the KR1? If so, can you then use the clip on the KR1 18350?
The aluminum KR 18350 tube will not allow use of the clip. The TI version will, but on the KR1 the larger head will be bending the clip out and creating a lot of tension, but it is at least possible.
I use the clip on my 18350 KR1 (copper and aluminum). The clip does not work on aluminum KR4 18350, but does on titanium kr4 18350 setup.
Anyone have beamshots of D4S with W2? Interested to see how it compares to XPL-HI flavour and KR1 W2.