Review : Utorch UT02 Flashlight (XHP35 / 26650 / usb rechargeable)(in progress)

I’ve had UT02 before and lost it.
Today I received a new one and noticed a big drop in quality:

  • the USB port cover is very flimsy
  • I got a nearly 2 mm dust particle inside reflector as well as small amount of fine dust
  • There’s ~1 mm gap between the head and the battery tube. I see grease shining in it.

Where did you get it from?

I think there is exactly 1 shop that sells Utorch lights:
Gearbest.
At least that is where I bought it.

Didn’t know that Gearbest was the exclusive seller, thanks!

Early on when they first came out I had 2 that where really dirty, the last time I purchased 4 of them was 2 Christmas’s ago and they were perfect. I was about to get 2 more?

Meh back to the quality lottery again… :person_facepalming:

No science here… But when they start selling these for less than 30 bucks… yeah, I kinda can imagine manufacturer needs to spit ’em out faster…

Well , last one i received back in November was superb . I guess i was lucky …

I wish there were more hosts with this reflector diameter , like the Supwildfire 18650 light but in better quality .

Just got a NW one for $29. Great light. I appreciate the extra capacity of 26650, and with such a large head there’s really no reason not to use one. I would’ve paid extra $10 or so for (slightly throwier) emisar D1s, but it’s use of single 18650 in this form factor seems ridiculous.

+ 1 exactly

For some time I wanted to improve my UT02 but … I could not take out the driver. I could not sleep tonight so I took one more approach and succeeded. As it turned out, the tile is slightly different from those in the first versions. You can see big sloppiness. In addition, I received a “corporate modification” in the form of an additional capacitor. Hmm interesting. I added the resistor R100, corrected the cables, cleaned and reassembled. It works and it’s good. The current measurement for 4.15V in turbo mode is 3.93A and in High mode 1.32A. Before modification, I had 2.9A and 0.9A. As I later make a calibrator measurement, I will complete the entry.

Supplement, before modification, color 4258K and 3292 Lux with 5m:

After modification, color 4332K and 4505 Lux with 5m:

Can you or someone provide a like to where you can get the resistor on fasttech? I can’t find it anywhere. Other vendors included. The main problem is that I don’t know what size resistor. Is it a 2512, 1812, 0805, 0603? Thanks

The resistor has a length of about 2mm

Since you are in US, I would buy on ebay. I think you need the 1206/3216 size 1/4 watt. This is a common size for sense resistors. If you want R100, look here.

Too big.
Of course, the larger one will also fit, but originally it is 2mm, at least from what I remember.

So like a 2012 (2mm x 1.2mm) or 0805?

Here is one.

https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.com%2Fulk%2Fitm%2F191881610303

https://www.fasttech.com/product/1615807-1206-0-1r-smd-precision-resistors-100-piece

It’s discontinued. That’s why we can’t find it with a search of the store.

So an 1/8 W R100 would work?

It looks like it. They are so cheap, you might buy some R082 and R120 as well. Maybe even some R050 to try out, but it might push the driver too hard.

I don’t read whole topic but maybe some have the same problem, my sample of UT 02 is only getting barely 800 lumens, and tail current is 2.6A. Ok, I’m not expecting 1300 lumens but 1000 will be expected any situation similar to mine ??