You can not compare the Two, however, this is very, very impressive.
I ordered another space heater for one of my Tenants, Monday @ 8:30PM. I just received it! This is NOT PRIME…….this is w/ FREE SHIPPING!!
38.5 HOURS it took from ordering until it arrived at my door. 
Here’s one for you—Expect people to be the way they are—You won’t be disappointed — 
I’ll bet that heater originated close by
yeahh…Just googled it……11 locations within 30 miles! KOP Warehouse is 10 miles away!
My neighbor needed help taking the trash out,74F in his unit,59F in mine!!!...I am half Husky!
I have electric heat,Not efficient…,blast in morning, maybe when a guest is here[!!],space heater in Bedroom keeps it very warm.
There’s a R015 limit resistor (0.015ohm) between the FET’s source and GND. I’ve got a pic hang on…
just received my ns22
I chose 21700 tube and stainless steel bezel, and it came with both 18650 tube, 21700 tube, aluminium bezel and stainless steel bezel!
I measure barely 1000lm, hotspot is well defined but I haven’t measured cd yet.
it’s a good host, I want to try a white flat on this flashlight
@Cereal-killer, if I understand this well, it’s actually using the FET as a linear regulator?
If so, that is very interesting.
Man that is too bad I was hoping it would be like their last model of this light. It had a linear driver:
Now i’m not sure I want to put a white flat in it
No, it’s using a .015ohm resistor as the only current limiter, it’s a standard FET driver, no regulation.
To be regulated the resistor would be on the gate side of the FET and the MCU would sense current output (voltage drop over the resistor) and alter the FET’s pwm signal to maintain that voltage at a set point.
Aren’t lower modes actually regulated though?
Pics taken from ZeroAir’s website for reference.
Using dual FETs with one being used as a CC FET would make plenty of sense.
Would removing this and replacing it with a metal jumper make it like a typical FET?
There’s what appears to be a smaller SOT-23-3 FET on the board up at the top (in my pic) but I’m not sure what it’s there to do…I do know both of the large FET’s are simply in parallel (all 3 legs are parallel between the pair which IMO makes zero sense, why waste money)
Yes
Anyone order the SST-40 model want to open theirs up and take a picture? 
I looped a 22awg wire on either side of the resistor legs. A few observations. I seem to have only 3 modes now ~1.5amps, 5.x and 5.6-5.7 with a high drain cell. I seem to have lost the lowest mode and some of the other modes went up in current.
EE master C_K, what say you? I’m just some guy with a soldering iron.
I say it’s a piece of crap and you should just replace the the thing lol.
BTW are your FET’s marked?
No, they look like yours
It’s BS that companies trying to make friends and sell on BLF still do that…
PLEASE CONTACT ZHANG NEALE. He has NOT responded in 6 days[three emails sent] Six days ago he told me the tracking was not working because of the weekend.
DHL keeps telling me ONLY a shipping label was created.
If I do not hear from him by Monday I am filing a claim with Paypal.
My order # is 1930
Hopefully you respond to this. I sent you two PM’S a few weeks ago about the other light and heard nothing.
Have a good weekend
Ok sir,I know your doing your best.
I am frustrated w/ this Neal guy. I do not care if I am buying a piece of bubble gum or a Maserati[My Brothers car,I have a Hyundai!!]
, I do not like be ignored and get resentful towards unresponsive people. …I will get over it.
However, I will send CAPO[Boss/Chief in Italian…mobsters!] and his soldiers over to China to take care of business! lol! :money_mouth_face: :smiling_imp:
The Rofis 21700 fits fine. There’s plenty of play on the springs.