We don’t know the price. Will you buy it for 400 USD? 
I predict 189$
It uses a FET+13*7135+1*7135 driver
Lower than $100.
That’s fantastic! This is a definite buy.
I’m surprised to see that nobody asks about what optics the D18 use.
Ok, I can not wait to tell you, that in order to maintain a smaller head, and as pocket-able as possible,
we use 18 pcs single optics, and squeeze every tiny room in the head. Not a easy work for the assembly, the production speed is slow.
raucous applause erupts from the internet
I have some questions 
- Will there be XP-l HI 3A version and if it will be more expensive?
- Is it possible to order a black frame in the front in the black version?
- Will the batteries be replaced by unscrewing the tail cap, or do you have to unscrew the whole tube?
@Hank, how much work does that require?
That looks insane.
Very nice work Hank!
Curious to see a side by side with the Meteor m43.
- 18 pcs XP-L HI 3A LED will be very expensive.
- It is black mask on all the D18.
- You will need to unscrew the whole tube to change the batteries, just like the Meteor M43.
With a “normal” driver and the best firmware around. Glad to see you got your hands in this one TK, I remember you aching when you couldnt do anything with the Meteor FW.
PS: This has a bit of a DBCustom vibe coming from it haha.
Looking very good!
I presume this needs button top cells? Might order 30Q button tops before the D18 goes on sale
Will this dethrone my ROT66? No stainless steel tailcap, aux leds on button and head are turndowns compared to the ROT66, but the sheer turbo burst output and the possibility of more efficient lower runtimes make me salivate. If 9 emitters in an ROT66 can run without heat at around 1400 lumens, I’m assuming double the emitters can get up to like 2-2500 lumens without heat issues? Maybe, but it is a small host.
[quote=Hank Wang]
I am aware that XP-L will be expensive, but I prefer this option anyway. Will you still give this opportunity?
So swapping the lenses should be doable.
But there’s like 500 lm loss because you need to put a glass in front of them 
What is the diameter of a single lens?
Have you considered adding a 19th lens in the middle and moving electrical connections to the side?
BTW:
I’m very happy to learn about the price. I’d really like to get one as soon as my budget permits it.
And one more question. Will the LED system be aligned with the switch? I had this problem with M43 and I had to correct the alignment myself.
Seems like XPL wouldn’t fit under this tiny optics.
Thank you Hank for another facinating light! I’m so thankful for your work and look forward to this in my hands! You are very creative!
Yes, please,