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

That doesn’t matter.
You have used a lot of pictures of several megabytes each.
Setting the % page width doesn’t matter, it takes unnecessarily long to load anyway, because the files are huge and many in number.
You should scale them down on your PC first before uploading.

Not complaining, but I also have noticed page 1 takes a lot more time than any other page to load…

Ok i will probably do this when i update the review .

Thanks for letting me know , and sorry :slight_smile:

Good point, because i forgot that a linear driver just turns the surplus Voltage to heat = waste.
But in this case the voltage has to be quadrupled (that’s 4x) approximately, which is usually not that efficient.
A.f.a.i.k. boost and buck conversion works much more efficient when it’s within about 20% difference between input and output.

:+1:
Thanks.

Peak output being at 2.5A which occurs with 14.4V, or thereabouts, voltage is a bit more than tripled, not quadrupled, but still… the constant current style puts a heavy load on a dying cell by maintaining voltage at the cost of ever increasing amperage draw from the dying cell. Sounds problematic to me, considering that a hot cell can be a bomb. Factor in weak, cheap, and/or inferior components on the driver to save every fraction of a cent and it’s not a likely candidate for bumping power to for just anyone.

xhp35 has 2 versions 6v and 12v, if you are measuring from led 12v versions current will be half of 6v version. Measure voltage please if you’re measuring from led

No, not according to the CREE spec sheets: http://www.cree.com/LED-Components-and-Modules/Products/XLamp/Discrete-Directional/XLamp-XHP35, not to be confused with the XHP50: http://www.cree.com/LED-Components-and-Modules/Products/XLamp/Arrays-Directional/XLamp-XHP50 which is clearly dual voltage.

It is when the cells are below 3.6 Volts.
And for 2.5 Amperes it will have to deliver more than 10 Amperes.
But a fat 26650 can handle that easily.

My mistake. You are right, sorry

Why does the info say this light has a belt clip? I don’t see one.

Is the sense resistor the one marked in orange in Manker’s driver?
Can you show a pic of this Utoch driver?

i think it’s too small to be Sunt resitor

That’s what I think too.

It’s exactly the same driver .

Yes, the resistor in orange is the one that i changed (added resistor).

Can you read “Manker” in the Utoch driver? :frowning:

I have 2 of these beauties, lucky me, here are the amp reads thru the 5 levels, for one of them, the other is slightly lower, 2.25amp. UNI-T meter and a Purple Efest 3500 off the charger! Pics of the dirty reflectors too!

Is the sense resistor the same value as the manner u21? If so, then there is really something weird going on.
If not they may have just used the wrong resistor?

Thanks for the pictures and the testing, a shame the QC was so bad. I really like this flashlight, XHP35, 26650 and side switch. I really hope GearBest will find a solution to the problems.

Somehow I will make this little beauty work, I just ordered a second NW so I better :smiley:

Sense resistor is same value , and Gearbest confirmed that the light should perform better.

They are currently looking into it , and there could be only these 3 lights defective.