This light a while back was priced @ $13.50 with a additional 50% off coupon, and I could not resist:
I linked this to a friend, whose order arrived before mine did. He was raving about it, and had bought 3 more instantly.
I too was impressed when mine arrived. 1000 lumens believable, great throw, 5500K or so, but noticeable PWM strobe effect on some output levels, which I did not really mind.
The 16340 battery provided is OK, I bought some vapcell T8s 16340's that require 200 more mah to recharge fully within the light and add significantly to the run time, which is not all that great, compared to when one is used to 18650's far greater capacity.
The Mini USB port cover is a little loose.
The headstrap itself is very good. Stays put, comfortable, adjusts up or down nicely
Great little light, could keep it on my forehead between uses, and forget it was there, or stuff it in a pocket T shirt chest pocket.
Unfortunately I swapped a battery , and reversed the polarity, and the next day it did not work.
So I had 3 16340 batteries and no device for them. Intolerable!
Decided to order the 4000K 95+ CRI Sofirn HS10 from sofirn dot com, ship directly from China.
Took 16 days to arrive. spent 4 days in LA harbor. Sofirn tracking quite good.
It Blows away the above linked budget light. Colors do pop, especially green trees. Great throw and nice even spill. 1100 lumens believable. Pretty insane amount of light for such a small light. USB C recharging. My armytek c2 pro max is also 4000k, and using them together on most objects their color seems to match perfectly, but green trees with teh 95+cri HS10 were a much brighter green than the armyteks 80+ CRI.
It starts blinking once, then twice, as battery gets low. I removed Sofirn labelled 800mah battery about a minute after the two blink warning, and battery read 2.87v. It took 599 mah maxing out at 0.83 amp rate, though it claims 1 amp charging.
It read 4.16v when Done charging via USB within the light.
I did not really expect to like these smaller 16340 based lights but I honestly see them getting the most use, other than dog walking, where the small body is not big enough to block oncoming car headlights from my eyeballs when mounted low on forehead.
But Combining the armyteks wide floody 4000k spill and 3720 potential lumens, with the HS10s throwy nature with same color light makes for a ridiculous amount of light available, far more than needed. Turn them off and go blind until eyes readjust.
The stepless ramping function of the HS 10 and HS 40 makes me wish the Armytek had it.
The ramping on HS10 is slower, more precise, and goes from 1 moonlite to 1100 turbo lumens, or back down, over ~4.5 seconds.
The HS40 ramps from low( not moonlite) to turbo or back down, in less than 2 seconds and much harder to dial in the desired light level without going past it three times and then saying good enough.
Now, I have a few healthy 14500's and only A decade old sipik 68 clone to use them in. HArd to believe I once found the clone so impressive, as it is just dwarfed by what is now available.
I have a separate charger ( nitecore I4v2) but most of the budget 14500 lights do not have built in charging, and I have decided I prefer it as opposed to an external charger.
I use 18650 cells in bluetooth speaker or a dog toe nail grinder, and I've been reaching for my 18650 headlamps to chartge those batteries within it, so I can use the USB meter and see how much amperage the battery is accepting and how much total mah the battery required.