Assume you have 15Wh of energy (4Ah x 3,7V avg)
The turbo high (~24W?) switches to medium(12W) after 3 minutes.
At the end of discharge this so called âhigh modeâ is probably only 7-8W.
So dividing 15Wh by average 10-11W gives good aproximation of ~1.5h.
Looking at the run time graph in the review, the actual is 2.2 hrs for my sample (starting from turbo). Low is approximately 300 lumens and bright enough for many tasks.
I'll set up a run on the low mode, tonight. Report to follow...
Following up, the light ran for 8 hrs 20 minutes where it dropped from 900-475 lux (300-150 lm) down to 281 lux and below. I shut it off & found voltage to be at 2.7V.
Had no idea how to calculate that before you show how it was done so thanks for that!
Thanks for the update and testing, looks very promising and already contacted Sofirn to order a few of these.
Iâve noticed and increase in shark activity in my swimming pools so I wonderâŚâŚ.will it repel sharks?
What is interesting about his is that I can use it in highly âwetâ areas. Like if a snowblower jams at night, I can use it without worrying about water melting on it and causing a lithium bonfire. Or using and abusing it through wet work gloves. That already happened to me last winter and even though the flashlights are âwaterproofâ I was a bit concerned about snow melting on it. Although it did keep it cool!
I wrote on a previous post I donât need another flashlightâŚâŚ.yeah, rightâŚâŚ 
No worries, marked-as-spam. 
I ordered the flashlight on Aliexpress. Waiting for delivery. Flashlight is simple to use rotating ring and is also suitable as a gift for the older person. You can see exactly what mode is set. It may not be easy for the elderly to select modes by pressing a button. I turn the ring and itâs done.
Cool video!!! Do you like floody or thrower as a diving light?
I prefer thrower, it helps with underwater communication in dark water
I added some better beam shots in post #11.
Hjeh, and got away lucky in the 2nd shot. :laughing:
I just saw one of the little armadillos here crunching away on catfood and busted-up cookies on the patio. Birds didnât even touch the latter (theyâre like, âHey, wherenahellâs our bread??â), but I knew come nightfall someone would.
We had a white skunk here last year (yeah, all white but 2 parallel black racing stripes down the middle), but havenât seen him/them this year.
Thing is, you could smell when they were in town. Their stank just carriedâŚ
Anyhoo, love the way the â05 just lights up everything in sight, and the magswitch is a hoot!
I was eating at twilight in The Basin campsite of Big Bend NP and heard something coming up to the table. It was a white skunk with spots where stripes normally are. We jumped away and in doing so, scared the critter away. 20 minutes later, I heard little feet again. This time, it was a brown skunk with white strips. OMG! Better than bears!... I think.
Funny story: https://tpwmagazine.com/archive/2016/jun/ed_3_skunks/
Wow, I thought there was only one kind of skunk, too. Black, white stripes, speak with French accents, etc. Had no idea there were so many, especially in Texas.
But this is NYC weâre talking about, and I never ever expected to see skunks here, yet multiple kinds. Trash-pandas, sure, as they live in cemeteries where theyâre relatively undisturbed, and forage for food at night. Was surprised at my possums, especially when I got to pet one which was wedged in a trash bag licking out cans of catfood. Yep, played dead when I pried him out, mustâve come to when I was showing him to a neighbor who was coming home late, and the critter saw his chance and made a waddle for it, taking off down the alley, so I let him go. (They glow red under UV, too.)
Whatâs really crazy about NYC is that you have coyotes . Surprised I havenât heard of black bears there or are they?
Havenât heard of coyotes here, but foxes were running around a few years ago.
Bears are generally more upstate than here. Joisey, too.
They can adapt to anywhere.
Oh yeah. Nature Will Win.
After the Zombie Apocalypse and all of hyu-mons are wiped out, Nature Will Win.
If they can make it in NYC, they can make it anywhere. 
I wonder what a NYC coyote accent sounds like?
Hmm, so much for time-indexâŚ
Skip to 0:41.
I guess it would depend on which borough they live in.