I’d like an XHP as well. I ordered the creamy green also, I figure it’ll be a great camping tool for signalling.
I’m looking to buy a K1 as my first thrower. Got the D4V2 last week and im very impressed.
I’m wondering if anyone has thought about offering a D4 head swap on the K1 body since it has the 21700 battery/charger.
Is that feasible? or if not is a 21700 d4v2 in the works?
I doubt the parts are compatible at all since the K1 has the charging port and circuit at the head side of the battery tube.
I don’t think Hank is interested in making his EDC-style lights in 21700 since they simply become too big for most people to pocket carry. Better to keep that for throwers that already have large heads and just offer the slightly chunkier D4S for people that want a light with more capacity and mass for heat.
Any news for the XHP version?
What do you mean by XHP? If it's not a XHP50.2 3V, then it means a driver redesign. Did Hank say he was working on a new driver?
I love the idea put me in for a couple !!!
How about Osram W2.1?
I re-quoted this as the 300kcd go clipped to 30kcd…
Stock the gt mini with osram was…130kcd…?
I had a GT mini Vn that hit 300 kcd, very nice.
I wish we could see 1000 lumen and 400kcd in a package that small….
Ahh, that was 5 months ago. Seen a lot of posts after that talking bout it, but nothing that said he was actually planning on it - thanx!
He works with outside contractors for the drivers, so might even be a BLFer, dunno. 2A is a little under powered but it's the common level for XHP35 boost drivers. Certainly nothing new - a lot of lights on the market have single cell boosts for the XHP35 and HI, specially popular in the tactical market. The drain on a single cell is very high. It's what we, and DEL, found out the hard way with the original BLF GT. At 2 amps, the draw is significant, very difficult to achieve 2.5 amps. The XHP35's draw about 13.8 volts at 2 amps.
With loss's, I'm guessing it would have to draw 9 to 10 amps on a single cell to maintain 2 amps. 9 amps is like 20 minutes on a 30T if it can hold the draw til it empties, 27 minutes on a 40T, and that's optimistic. The XHP35 and HI have been around a long time now, doesn't make it obsolete, but it's not the most efficient. Granted though, if you can get one in a good tint, that's where the advantage may be. It also doesn't have the tint shifts of the 2nd generation of CREE's.
I like the XHP35 HI for its tint and beam profile. I’d expect it to have similar, or maybe even a little better throw than the XP-L HI in the K1 but with a larger hotspot.
A single XHP35 will draw more current from a single cell than something like an XP-L but it also makes a lot more lumens OTF. The boost driver will actually end up being more efficient (at similar currents) because you aren’t wasting any of that power as heat like with a MOSFET regulated driver. 2A on a single-cell 12v boost driver is perfect for using a 50E for a little extra runtime.
Of course if you just want maximum candela, the Osram is still the best choice.
I love my d1s 3a, this is so tempting. Is there a specific purpose for the green model? I’ve reread this whole thread and didn’t see anything. I’m back and forth on a w1 or w2.
I GOT TO GET ME ONE OF THESE!!!
Has anyone tried the sst-20 version? I’m partial to that emitter. You thoughts, please.
Just buy the green osram to become a jedi :sunglasses:
The K1 doesn’t come with a cell, does it? So would a high-drain 18650 (in a size adapter) produce equivalent light output in the K1? Like, say, a 30Q? I already have a bunch of those, and shorter runtime wouldn’t bother me.
As far as 21700 cells go, I think I saw some posts saying the 50E is about the best, but since the 30T and 40T have higher continuous-amp ratings wouldn’t they be better still for output? 
(again, sacrificing runtime)
No, the driver in the K1 is regulated so no matter which cell you use, it won’t draw more than a specified amount of current. I think the maximum current depends on which emitter you choose, but they are all within what any standard 18650 cell can supply.
Thanks for the info.