Thats with a modded driver or a fed dd one? If modded…wow, if that holds youll be luckiest guy arround here, i have 3 of those allready failed , its the way it should work btw, or at least 5.5 amps
Lumen/cds output?
It’s a 26mm FETDDsir404Vishay Mtn driver Standard E-switch 6 levels with 18awg Leads with the (+) lead drilled thru the driver base and directly soldered to the spring. I even copper braided the big ass tail cap spring, probably don’t mean much!
Emitter failure, Yes this isn’t the first time I boiled the XP-L HI V3, I had a Cometa pulling almost 7amps and it broiled the flat silicone cover off and of course it failed, but I don’t use Turbo too much, the next 2 levels down are more than enough, I’m not hunting Jackyl’s! 
As far as the new 20700’s go they perform just as good if not a tad better than my Sony VTC5A’s, I’m using the high amp A’s and they seem to be pretty good performers so far?
Quote:
This 20700A is a true high performance cell that I am rating at a cool-running 30A 3100mAh. It performed well against the top 18650 cells for performance, vaping time, and safety (high amp rating). The 20700A…
…hits as hard as the Sony VTC5A at the start and easily holds its voltage up higher for considerably longer.
…runs about 20% longer than the VTC6 at 20A continuous down to 3.2V.
…runs 5°C cooler than the LG HB6 at 20A continuous and for about 230% longer. Yes, 230%.
Here is a quote from this thread 20700 Batteries What is real? and it seems to back up what I’m seeing from my personal experience! And these batteries are even pushing better then my brand new Liitokala’s, not really impressed with them so far, do these Liitokala batteries need to be broke in, drained and charged a few times before they perform?
As far as LUX, it increased a bit, nothing I would call outstanding, so I’m thinking the LED is maxed out as far as output, but I have some V6 1A’s stewing in some new stuff I’m trying out, this fliud is really strong smelling, I had to put it the container in the garage, but I’m going to give them a GO!
I am tempted to order this light but i wonder if the driver issue is solved (just pulling around 2,5A from battery, 1A at the LED), as I recall there was a wrong resistor installed?
I like the form factor and look of this light and do not have one with a XHP35 in my collection. To buyone it should perform better than my L2 single cell XP-L HI with A6 driver.
Does anyone know if gearbest has solved the problem with the manufaturer?
Better than VTC5A? Well thats something realy good, thanks for the tip! I havent test any 18650 that could outperform vtc5a so far
Yet you should find Liitokala 26650, its 5000-5400ma( depends on the batch obviously) , has a great capacity and nothing could outperform it, at least nothing that i tested
20700 would be great for my evic mods, i havent though of that ! in the mater of fact i am a MLT smoker yet its capacity would be unbeatable, currently i am using Sanyo GA since i smoke at 20 watts/5 amps anyway
That's good news bout the 20700A. Was think'n it would do well. There's not much data out there on it - everything is 10A or above dis-charges from Mooch's review: e-cigarette-forum.com sanyo-20700a-30a-3100mah. Check the last comparative chart, again, high amps, but shows it against the 30Q, VTC5A and VTC6.
few weeks ago I received my UT02 CW (1A ordered, but in my opinion is a 1C), even on my I measured only about 2.4A at the tail-cap.
Last weekend I replaced the original resistor R05 with a R01 getting 5.6A, but with only two brightness levels, so I replaced it with a R018 getting 5,4A and 1390 lumens and with all levels perfectly functioning.
Then I did the bypass spring and I got 5.6A and 1,450 lumens.
Now I am very happy with this little thrower , I hope the driver resist.
sorry for my bad english
Cool. thinking of modding mine to get more too.
Can you check if there is any other issues occur?
all the mode they work properly, even the hidden mode
sorry, correction
no step down
but for me it’s even better
I have not noticed any other changes.
Interesting. You mean thermal or low voltage stepdown?
thermal step down
Turbo mode in the normal group or turbo in the aux modes group? Because the stepdown in normal turbo is time controlled, not temperature. I don’t see why it would change with a different resistor… Or perhaps it does step down but high and turbo have the same output?
That would be interesting!
Nice! Good work mate! 
I do not know why the change to meant that the step-down heat no longer works, but it is.
I could not control the brightness of the most low (very low mode) but I have measured, with a ceiling bounce test, 160 - 500 - 1000 and 1450 lumens.
and also make 1450 lumen after 10 min in Turbo mode.
Have modded it yesterday, I added 2 0.2 ohms resistors in parallel with the original one resulting in 0.033 ohms (is higher than 2 0.05 ohms resistors in parallel which is 0.025 ohm).
Amp draw at the tail cap was 5+A. I’ve also put some silicon thermal glue on top of the driver hopefully it has some positive effect.
Now it has great output.
Finally re-modded my UT02
It’s now running Narsil v1.3 (with a working switch led indicator now!!!) and a new led , a dedomed xp-g2 s4 1a .
Emitter is running at 4.4 amps and flashlight is now making 292kcd . Man , that light throws ! (And i have emitters running even higher from a single cell , @4.85 amps)
Give us some beamshots compared to U21 if possible
I will take some beamshots , today or tomorrow
MAN! I wish you lived in the US and offered a mod service.
Say guys, one of my lights has the modes screwed up, 2 and 3rd I believe, just sort of a light nudge barely recognizable but have to double click past to get into next working mode.
I remember seeing somewhere way back down the thread a fix and or a similar issue but can’t find it and even if I did not sure if I am able or skilled enough to fix it, what would be the next best option since GB is demanding a video and I can’t take a video of this issue it wouldn’t make any sense to them and just what if I wasn’t really pressing the switch anyhow,
I am irritated with them but whatever I’d like to fix it myself, it’s an awesome light and the other one I got is perfect, maybe a point to the fix I might have noticed would be a great help, Thanks all…!
By the way GB has the UT01 for $20 and UT02 for $42 or so today so picked up a couple more 01’s, that makes 6 now, fantastic lights George thank you… again ha ha…
GB UT01
UT02 only warm $42.95