[POLL] Does your recent UT01 have ON / OFF problems?

I don’t know…
I guess buyers should open a ticket on Gearbest.

i just did that,
i dont know how they will react…
but what i do know is, i dont trust there reviwes, they never post my “bad” reviwes, only the goods.

btw, dose any one got the negative side of the eneloop damge from the spring?
like the battery tube is too short, and the spring is pressing too hard on the baterry.

I am not seeing any damage on my NiMH cells, including one Eneloop.

What does your tail cap look like? Mine seems to have two springs, the inner one is kind of crooked… not sure if that’s normal…

Yes, the batt. tube is very short.
Only AA and unprotected flat top 14500 fits actually…

No fit problems with my 2000mah eneloops or efest IMRs

Mine hasn’t arrived yet ( ordered Oct 25 ) but have been following the threads about this so will chime in when it does arrive! Unfortunately my 14500’s are protected so probably will only be able test Eneloops and Alkalines.

Protected will be very tight. Don’t force it.

My UT01 switch has issues, but not exactly as what you described. Mine probably just needs a cleaning as I need to hit the button just right. Doesn’t matter if using AA or 14500.

I got my first UT01 today and I experienced exactly the same thing as you described.

At first I put in black eneloop NiMH cell. No matter what I did, it didn’t turn on. Then I tryed 14500 pkcell and voila, it works! Then I swapped this cell again with previously non working NiMH cell and now … it works!
Strange.

As noted elsewhere, my first UT01 only works well with AA NiMH, with an unprotected 14500 it needs to be power cycled after being turned on once. I just got a second, in the hope it would work with a 14500. It arrived a couple of days ago, and so far, so good!

Still, I’m gun-shy about ordering another, even though I’d like a CW.

Just throwing this out here as a wild guess……do you suppose these things have some sort of capacitor on the driver that has to ‘pre-charge’ a bit when a battery is first installed after a period of being empty?

One of mine wouldn’t work right out of the box, but after sitting with a battery in it for a half hour or so, began to work and has worked properly ever since. Another works 100% reliably with a lithium primary, but doesn’t with a NimH unless it sits for a while - then it also comes to life until the voltage gets down to about 1.2 volts, where it just plain quits with no warning whatever. (I don’t have any 14500s).

Another thing I’ve noticed; I have other 1xAA lights with EOSLAMP drivers in them, as well as a couple of stock 4Sevens Minis. When a Lithium primary is playing out, I’ll see ‘high’ and ‘medium’ at the same level for a while, then eventually ‘low’ on all three settings, then a few minutes of fluttering and ‘wavering’ until it finally gives up the ghost on a totally empty cell. The UT01 just quits. When it’s done, it’s done, and it’s lights out with no period of sag.

Weird little lights, but when they work right, they’re a real gem! I figure if I can get three out of four that work, I’m still getting a bargain. The emitter alone is worth most of the ten bucks.

I have a recent Haikelite SC01 that has an on issue.It will just flash after clicking 3 times, taking off tailap and replacing let’s me turn it on after clicking 3 times. Currently looking for fixes related to this light. Another two Haikelite HT35 lights have switch or electronic issues. They will come on only if there is an exact amount of pressure from the tail cap to the battery. Gently pulling back on the cap as I tighten allows the light to come in. I’ve got another Haikelite MT01 that works okay but it is somewhere in the house that I cannot find it. Lol!! Ridiculous issues with Haikelite!

replacing the switch with a good one from Mouser fixed the issue

definitely the original switch produces a bounce or other thing the firmware does not detect as a click

Too bad I threw away the faulty switch without measuring its continuity or resistance

After work fine for a few days, I put the fully charged 14500 in, the light got hot with a smell of something burned inside then I changed another 14500 the light turn on by itself and can’t change mode or turn off. With Ni-Mh it can’t turn on anymore.

Open ticket to GB they offer 5$ refund or spend more 2$ for a new one :person_facepalming:

if you get a new one I may be interested in the NW for a host to try put in a Narsil driver

One NW arrived and is so far so good.
waiting on #2 before I vote.

Got mine today. No go on li ion with Windyfire. All aboard with alkaline, nimh and Efest. Maybe it just doesn’t like button top li ion.

Windyfire flat tops are the only 14500 I got. They fit.
I generally only buy unprotected flat tops. Solder-blob if needed.

Well, mine is improving, at least, so it seems.
It’s down to just a few clicks before it turns on.
So i think i’m not gonna bother opening a ticket.
None the less, it is a problem they seem to get away with (either GB or Utorch).

No, it’s not really improving, so i’m gonna open a ticket…