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

Sorry, it’s messed up in my head lol.

As far as the XHP-35 goes, 2.6A is the sweet spot, output drops off after that. That’s emitter amperage though, I don’t know what tail current should be on this particular light to achieve optimum emitter current.

Edit: This is both in my experience and with testing TA is doing. :wink:

Amps at the cell is like 4X the LED, roughly, maybe little more. Should be doing over 5A because stock, the U21 was like 1300 lumens, so in the 1-1.5A range, think it was spec'd at 1.3A at the LED. Wonder if he had it on true turbo... I've made that mistake before.

Since these boost drivers are a bit more finicky, don't think you can crank them up much, plus it's a huge pull of amps for a single cell - 2.5A at the LED is at least 10A from the cell. Good reason to convert the driver over and go with a conventional single cell LED, like the XPL. I got just over 1,700 lumens on a dedomed XPL in this light.

Thank you for the review so far, the amp draw is very low, I have a X1 with a boost driver it pulls 7,34A on a rested King Kong 4000 mAh ICR26650 at the tail for 1,47A at the LED. I think it should be pulling at least 5A to get 1A at the LED.

I have already contacted Gearbest and i’m waiting for more info about the driver . It should pull 5-5.5 amps .

Intensity is lower too , something isn’t ok with the driver .

Making not look forward to the delivery of mine now. Hmmmmmmm……

Maybe only mine is/was faulty .

Anyway , if there is an issue it will be solved somehow .

Contact Manker, they have the blueprint.

Gearbest is the shop that sells the lights . That’s the one thing i know , and contact gearbest if you want to know the manufacturer .

I would appreciate if people who get the light report back , thanks .

Trouble is most have no way of measuring output so won’t know if it’s working properly or not :frowning:

Cool, thanks for reviewing this light.

Measuring the amps at the tail will do.

Exactly

Think I’ll give this one a miss.

Don’t have the equipment to measure output or amps at tail.

We don’t know if any other flashlights have any problem.

We will see…

For reference, and comparison, does anyone know what the stock Manker U21 pulls?

From Tom E ’s review i remember 5.45 amps in turbo .

Ohhhhhh. That’s why those numbers were being quoted. Sorry. I thought that was AFTER he modded it.

No, it's in the review thread OP and I'll stick with stock #'s, etc. for the OP.

"On Turbo, measured 1.08A at the LED (16 AWG patch wire, UT210E clamp meter), and 5.52A at the tail with a EFEST IMR 26650 5200 mAh cell. "

Ouch. I really hope giorgoskok’s results aren’t the norm then. Guess I’ll find out tomorrow night when mine arrives. I don’t know how to measure that, but at that much of a difference, I’m sure eyes will tell me when sitting side by side with my U21 (that I was hoping to be able to send back if this could replace it).