My bad. RMM was right. Just now I tried this with 4S behind the zener modded 7135 driver + an XHP-70 and it does not work. I was never able to get more than 600ma from the driver, and the modes would not change.
I also tried this with 4 gen 1 XMLs and the poor mans setup and the result is not much better. I was able to get full power but only for a short time and after a bit I was not able to change modes again.
Neither setup killed the driver, but it did get hot very fast. In the XHP-70 test I even had it pressed into a copper slug similar to a C8 pill. Running it like this for long would have killed it I think.
The 7V limitation really only applies to the Vdd pin since the voltage drop from led- to ground is whatever is left after deducting the led Vf. There isn’t a hard ceiling as far as I could find other than above 700mW heat sinking becomes critical to maintain operation. 700mW translates to a drop of 2V. The other fine print item I’ve mentioned before is noting the benefit of up to 1000^2 mm of trace area for heat sinking each chip. Pretty sure there isn’t that much trace area available unless you mount each one on a 12.6mm board with nothing else but copper on each side(pi x 12.6 x 12.6 x 2 = ~1000). Given adequate heat sinking they can be driven much harder but I don’t believe they can share that sink with another heat source unless it is sized for both.
This seems ideally suited for a MTNmax driver set to 2-3A though.
What eventuated out of this?
An ideal LED for a C8 and single 18650?
Or more a realistic option for a TM16 with quad XHP35?
Perhaps the TM16 is more suited to XHP50-70?
I dunno, you lot would, right ?
Well, the XHP35 is a ~12V LED, so you need either a good boost driver or at least 3 Cells.
So, this isn’t a LED for most flashlights, it’s more made for cars and other 12V facilities
i built a xhp50 TM16 
but the mcpcb died - noe i have copper dtp on the way to finish that project sometimes
I know of one light which can possibly benefit from this LED. The XHP35 can do some amazing things, just in rather unconventional situations. The hi-CRI at 5000-6000K is one thing that we often never have access to, but I’ve seen another side to this LED which I am quite interested in.
How many lights currently use a boost that we know of out there?
The TR-S700 is one that does use a boost circuit. It has an amazing hotspot for 7-LEDs. It is also beneficial as the cell count, whether using 1, 2, or 3, doesn’t really effect initial output in the S700. It is just about ready all of the time to get up and go.
Zebralight is selling 1x18650 XHP35 based lights:
SC600 Mk III - now available with XHP35 in both cool and neutral tints.
SC600W Mk3
SC63 - available for preorder in both cool and neutral tints. Supposed to ship at the end of the month.
SC 63w
If Zebralight can get a sufficient supply of emitters they are also thinking of offering the above lights in 90 CRI XHP35. That would be pretty nice: A tiny SC63-sized light with 1100 lumen output of hi-CRI 5000K light.
Thats a sweet light. Thanks for sharing.
The high-CRI Zebralights sound nice, but I worry about whether they’ve finally fixed their tinted lenses and if the emitters still make a Cree rainbow. It could turn out to be a much lower CRI than advertised, depending on details like that.
Now, if they used a dome-less emitter, that would help a lot. And an untinted lens.
Even more amazing is that they accomplished this with a comparatively small boost driver that scales up to 12V or more from a 4.2V cell. I hope they can maintain CC boost regulation down to the claimed 2.7V LVC. Very cool indeed!
MAXTOCH Copper MCPCB Cree XPG
+
XHP35A-00-000-0D0BD40E3
die at 1.8A
4 elements with the 12V supply voltage.
One of the segments extinguished.
Can some one sum this up for me please? i bought a XHP35 and i would love to put in my convoy L2? how does that sound?
You’ll probably have to use 4 18350’s in series to get the voltage to run the emitter. I don’t know of any boost driver to up the voltage of two 26650’s to meet the 12v requirement.
Indigo 5.2 
I’m use it in courui d01 + xhp35
1.8A on the led
Link to the driver?
The LD-51 does that trick. Driver for XHP35 LD-51
I’m currently talking with gearbest about that driver.
It’s not a direct replacement, it’s 28mm instead of 20.
Any ideas about modes? How many and what percentage?
Thanks guys for the help
I am not a big fan or 4 cells. I would rather a boost driver if i can. Even if it is not as efficient.
2 18650’s/26650’s with boostdriver will have more runtime than 4 18350’s.
yea i would rather two 18650’s running at 2amp so its bright.