COURUI DO1 'Big Head' (Black/GRAY NOW AVAILABLE) $29.99 @ Gearbest ( use coupon: gbcourui) A long-throw modder's light!

Soldered this back to where is should be, but this is not bright as my gray one. I noticed this blinks about once in 5sec, very fast blink barely could see it. any ideas why gray medium is as bright as this black high?

Why is the second leg of the inductor hanging in mid-air?

That’s the way it came. A few posts back, there is an explanation with the same picture. That is the part he is saying he soldered back to where it should be.

Got my grey one today, too.

Big ass light. Wonderfull.

Mine draws 2.11 Amps out of 3 90% full TrustFire 2400mAh (unknown age).
2.11 Amps trough a extremely thin wire in the end-part of the light… changed it immediately.

Feels a bit too light for it’s size, I think.

To open it, just like the Kings? Remove switch, push with screwdriver?

I desoldered the LED star and unscrewed the shelf. Then I popped the driver out from above.

I placed an order for a black one on Oct 13, got an email that the light was shipped on Oct 16. It is Nov 21 and it is not here yet. Should I be worry?

Not yet, unless you live next door to Gearbest. I’ve ordered three of these lights now. The first, I ordered for myself. I paid the two dollars extra for tracking, and was really displeased with what I got for the two dollars, so I didn’t get tracking on the other two. But, here’s how mine have been:

First light - ordered 9/23, received 10/20 - almost a month (with tracking)
Second one - ordered 10/23, received 11/05 - about a week and a half! Woo-hoo! (without tracking)
Third light - ordered 11/02, received NOT YET, STILL WAITING 11/21! (without tracking)

So, there ya have it. Shipping times are not consistent or predictable in any way, but will most likely be over a week at least.

He is waiting for 5 weeks now :wink:

I got mine in ~18 days including weekend and customs.
But I chose the NL Post - so it’s a bit faster than usual to germany.

I got an order from AliExpress from 25.04 this year some days ago… was delivered on road by a tiny snail I guess.

How did I miss that? For some reason, I read that completely wrong! I saw Nov where he said Oct, so I was thinking 5 days! Yeah, 5 weeks is a long time to wait. Sorry about that!

Almost seven months……World record!
Did it come in a “Note in a Bottle” thrown in the sea?

DavidEF, your second order arrived very fast. I ordered 10 days before yours. I am thinking to file a Paypal dispute in a couple of days.

Ordered 21st oct. Delivered today (so 1 month for me). Gearbest selected nl post to australia. I got black and it looks great. No issues at all (but haven’t pulled it apart yet). There was some solder on both positive and negative of battery side of driver, but its not a problem. Thanks gearbest!

So my light arrived…
batteries are charging so I can test it…
Impressions so far is not favorable so far as QC goes.
First thing i noticed…
box not even taped shut. Single peice of bubble wrap half covering light.
damaged anodizing
scratches on lense
impact marks and scratching on inside of reflector.
strange rattle when handling light.

Ok so Im not going to turn on electronics that rattle…

Pull the light apart…
No lubrication on any threads.
more damage to anodizing
scuff marks and what looks like a finger print on the led’s dome.
unscrew the pill…
located the rattle…
there is a random screw bouncing around on the driver… doesn’t match any other screw in the light so not sure where on earth it came from.

Batteries almost charged.
wonder if it will turn on!

Turns on ok…
High. Med. Strobe.
Bit floodier than I expected.
Dedome time

I just finished modding one of these and it turned out fantastic. I put a R50 over the resistor, added heavy gauge wire and used silver coated braid for the tailcap springs. I de-domed the emitter and put in on a noctigon. I also changed the centering ring out but I have no idea what ring I used. I always have a bunch of them so I just kept trying different ones until I hit on one that worked right. On the pill, I turned it upside down and lapped the surface with different grits of sandpaper until it was shiny. Then when I put it back in I used a combination of “omegathermal 201” and silicone carbide on the threads and around the bottom for much better heat transfer. Because of the vast discrepancies in testing I am not going to post my lumen count or KCD numbers. I’ll just say it’s Very bright and the beam is perfectly focused. At a quarter mile you can still see the round hotspot on trees. For me that puts the light into the super thrower category. Similar in lumens and throw to a fairly well modded TN31.

I just received mine and finished modding it too.

I remembered member LinusHoffman mentioned this is not a light for a beginner. I found out that is very true.

- The switch came unscrewed (or loosened during mail)

- The switch is very light - too easy accidentally to turn on. Needs washer mod.

- Absolutely tiny wire on the negative terminal - looks like AWG28! Needs some copper.

- High resistance steel spring - needs silicone wire mod.

- Pill has no hole to turn - needs some drilling

- HUGE HUGE thermal sag in the beginning. About 20% output drop in 10s. What were they using? Dang - the star doesn’t even touch the pill! It’s just sitting on top of the very strong epoxy-glue-like-gob. Needs emitter swap - XML2 on copper and proper thermal paste.

- Pill threaded to deeply in - emitter cannot focus properly. Barely touches the reflector. Needs focusing-refocusing by adjusting the pill depth until proper focus is found. CAUTION. Will blast 100+kcd straight to your eye if mod#2 is not done. Trust me :wink:

Honestly I was only looking to solder a copper line to the negative terminal - and ended up having to do all of the above. So, yeah, prepare some time if you’re modding this.

In the beginning this is not too spectacular a light. Just around 50kcd and not impressive considering its head size and people’s expentancy.

After initial braiding etc and shorting the resistor - it gets to 100kcd but drops quickly to 80ish - signs of huge thermal sag.

After emitter swap and final tuning, I managed to get 130kcd and it holds steady. Boy I must say this light is impressive. It’s not even dedomed, and I’m already so happy with the throw.

Where did you purchase it and does it work better than the normal silicone wire or copperbraid for deSoldering?

I'd love to see you post amps (taken anywhere you want) and throw #'s. We will gladly accept "18sixfifty" lumen and kcd #'s Smile. I've been adding a disclaimer when posting #'s - simple CYA. I refuse to let a small minority's (1) objection stop me. Would be interesting to here if someone got over 400 kcd out of one of these...

Silver coated braid? I use 22 or 24 AWG silicone coated wire now, depending on the spring size and seems to hold up much better than braid - I gave up on braid a while back.

Here is 18sixfifty’s thread on that subject: No more copper mesh/braid Silver is the way to go!

I can confirm both.
The Switch was barely attached and needed some force to go all the way down on mine.
Also switched the tiny wire to some copper strand

Yesterday, I changed the LED with this one .
The contacts of the board (even in original) touch the reflector - so I flattened some thick copper strand with my bench vise and soldered it with that.
Now the reflector can sit much closer to the PCB and this light throws well. It’s spot is now the same size as the Yezl Y3 - just a bit brighter because of “no sense resistor”-mod :smiley:

unfortunately I dropped the light from my bench and now it has a big dent at the back - but it could be worse.

:open_mouth: It is your flashlight? very good number! what else can know about her? :slight_smile: