Yes, and they powered the light without issue. I’ve been buying the flattops from Zebralight for years and they worked because the top protrudes past the label.
This is not a good choice. The current consumption from each battery is 15A (in turbo). This is the voltage drop with this load compared to Samsung 30Q.
It seems a good choice for his requirements which is longer, but slightly lower turbo output which heats up slower. Plus it has extra capacity to run longer at lower levels. Maybe he wants this?
With GA’s, the load on each battery will probably be less than 15A each.
I don’t think GA’s will hurt anything as long as you don’t care about measuring the max turbo lumens.
Yes, I agree it’s not a good choice if I’m bench racing for lumens. I’m curious how much lower the output would be with the GA’s. I’d love to see an output graph of with the GA to see what is given up in Turbo (which I’d rarely use aside from wowing people) in exchange for longer runtime at lower levels.
If you aren’t wowing people with turbo then don’t worry about using a GA. In reality I think the light is capable of pulling 15A per cell like komeko says but in my testing my light is only hitting 10K lumens briefly with a 30Q. So 15A is pretty much the upper limit with a 30Q using this light.
Interesting, the flood optics I got from Hank look different than both of those. They seem to be somewhere in the neighborhood of ~60 degrees?
There were wider ones for sure but I got the narrowest two that would fit 219b LEDs
I did this for science but the results are so similar i’m not sure it’s helpful to anyone. The hotspot appears to be ever so slightly less defined and edge of spill slightly cleaner. I thought the efficiency might go up but it appears to produce more or less the same lumens with both optics. I still think XP-L HI might benefit from this larger LED opening but i’m only going to try 219B.
Datasheet has support for other small-ish die emitters: XPG2/3, 219B/C, Oslon Square, E21A, LH351B
OEM / FP13028_LISA2-M-PIN
OEM / FP13028_LISA2-M-PIN
Finished up my D18 219B 45K mod:
When is Clemence making a E21A MCPCB for this thing so I can have a floody version?
What does 45K stand for? Do you mean 4500° Kelvin? It can’t be 45 thousand lumen.
yes 4500K
I guess a lot of Nichia fans use their terms like this, I left out the ‘sw’:
Nichia 219B R9080 sw45k
Nice mod, contactcr! 
That’s a lot of rosy goodness!
Yes, ‘sw45k’ is Nichia-speak for 4500 Kelvin.
It’s part of the emitter’s ‘color rank’ specification.
Here’s a label from one of the last boxes of 219B emitters from Clemence’s group buy nearly a year ago. 
I was fortunate enough to stock up then, and I have about six lights using them. I still have some to spare for future projects, but I still get weepy thinking about my favorite LED being discontinued.
I think I’ll turn on my 219B sw45k Emisar D4 to cheer myself up. 
There’s very little Nichia data in my head. I can barely remember all the Cree related data. Lol
Has anyone ordered a D18 without LEDs? I am curious about the price.
I would like to put 18x 319A 5000k into it.
First you need to see what replacement optics will fit. The stock ones have such small LED opening almost nothing besides sst fits
Someone got a quote from Hank without leds, I think they posted it in this thread. It wasn’t a big reduction, $10 less I think.
I got my emisar d18vn with the osram white 2 mm… this light is perfect. No green tint at lower mode… I got 14740 lumen @ turn on. Amazing! Throw is 140Kcd.
That must have been a nightmare to reflow
I want to see a beamshot 
When I first got the Emisar D18, I didn't have enough high-drain button-top 18650s to test the D18 with, so I used Sanyo NCR18650GA, which fortunately worked on the D18.
I have since then been able to get a few button-top VTC6, and re-tested the D18.
On an uncalibrated lux meter and doing a simple ceiling bounce test (with fully-charged 3x GA and fully-charged 3x button-top VTC6), the button-top VTC6 has higher lux reading.
Below are video beamshots of the D18 (but taken on different nights), using 3x raised-flat-top NCR18650GA, and 3x button-top VTC6
Emisar D18 (custom mixed tint, using 3x Sanyo NCR18650GA medium-drain raised-flat-top 18650)
Emisar D18 (custom mixed-tint version, using 3x Sony VTC6 high-drain button-top 18650)
