Lj , is your led centering ring black too ?
If yes , they are probably glueing them in the last batch
Yes, the centering ring is black.
Any recommendations on breaking the glue?
Heat and strap wrenches, for heat you can put it in boiling water, inside of a waterproof bag, the temp will never rise above 100Ā°C, use gloves.
That is how I managed to open my TN-31
Thanks Alex, Iāll give that a try. I assume wrapping the torch with a piece of thin rubber and using a nylon strap wrench would be best.
Ok, so I donāt have any strap wrenches, so I improvisedā¦.!
I tied some pieces of paracord to two screw drivers and wrapped two pieces of thin rubber around the body and head of the light. Then I wrapped the paracord in opposite directions several times until tight and used the screwdrivers as leverage. Same principle as using strap wrenches.
No heat required, just brute force :sunglasses:
Great work! :+1: Tomorrow I will do mine! And add some resistor to bump up the current to a bigger but safe level.
Thanks.
What resistor value are you going for? Iāve got some 100 Ohm resistorās that Iām going to try.
Do you mean R100 labeled resistor? That is 0,1 Ohm. I have a lot R100 so I try it with that.
Yeah I meant R100 not 100 Ohms :person_facepalming:
In case anyone is curious, this light will work with a 3xAAA battery adapter as a power source. Out of curiosity, I tried it with some fresh AAA Eneloops. Turbo mode didnāt work but on High it was getting in the range of 400-500 lumens. The battery indicator was red in this mode due to the voltage. Not too shabby although Iām sure the runtime would not be good on High. I was considering gifting one with a NiMH option to someone who didnāt own lithium batteries.
Iāve 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
- Thereās ~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.
Didnāt 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 Christmasās ago and they were perfect. I was about to get 2 more?
Meh back to the quality lottery againā¦ :person_facepalming:
No science hereā¦ But when they start selling these for less than 30 bucksā¦ yeah, I kinda can imagine manufacturer needs to spit āem out fasterā¦
Well , last one i received back in November was superb . I guess i was lucky ā¦
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 thereās really no reason not to use one. I wouldāve paid extra $10 or so for (slightly throwier) emisar D1s, but itās use of single 18650 in this form factor seems ridiculous.
+ 1 exactly
For some time I wanted to improve my UT02 but ā¦ 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 ācorporate modificationā in the form of an additional capacitor. Hmm interesting. I added the resistor R100, corrected the cables, cleaned and reassembled. It works and itās 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:
