All I know is both of mine work great, both stock and modded. I have a 1st batch S41 and then this latest S41S.
Able to share your feedback?
Sure, i have 2 also
Tailcap and tube with different knurling
One tube fits snug to the copper heatsink, the other sits about a half a mm off (same with the tailcap too)
the revised design the optics are to far away from the LED resulting in a strange beam pattern
Other than that it is consistent lol.
Mateminco is mankerlightchina at Taobao.com :person_facepalming:
The plot thickens :smiling_imp:
Yeah…
Matemankerlux…?
From Elfeland factory a.k.a. UltraFire…?
Who knows, right? :confounded:
They could have request to rename after separation. #awkward
How long until Amazon has a Mateminco store?
I got my S41s in the mail today. Same source as those above. Very nice light, however now that I have one I need to familiarize myself with the documented issues. I can only use it in the bottom two modes or it shuts down at 36 sec and won’t start back up until after a little wait :person_facepalming:
I have the nichia version but the CRI is low and very close to the XM-L2 3D tint… Very far from the A01 Astrolux.
Is XGP2 or XPG3 better as far as brightness / tint go?
Tint = 219
Brightness = XP-G3
The XP-G2 is the lame duck in this race.
Thanks, a few have said that the 219 tint isn’t that nice, might get the XPG3
Thats what I did, plus it is a bit cheaper. I would rather get the G3 version and enjoy the brightness and then swap to some LED’s of my choice later.
I have a mixed tint XP-G2 S41 that is great and a 219C 90+ CRI that is also great.
i just got mine as well and the tint is close to XP-L HI V3 3D. I mean it’s still neutral white…
Sounds like everyone is happy with the XPG3 brightness and tint…ordering
Uh… brightness is fine, but tint is IMHO… ugly! It´s a very cold, “harsh” white, it hurts my eyes after looking at the nice 5000 K neutral light from the S41 Nichia ….
K.
Yeah i’m quite happy with the XP-G3 version. 
Sure, it’s cool white, but it’s just a stupid amount of light the thing hurls out. 
(especially with 18650 tube and VTC5)
I did put a mild diffuser film between optics and lens though, to get rid of some of the tint shift.
Just got my S41S head from Banggood. It had only level 7. Boy am I glad these are openable!!! A quick test with the driver hanging free showed it was fine. I suspected a negative short to the case and it looks like (thankfully only) the negative silicone wire was cut into by the unremoved sharp burrs on the inside of the hole in the copper leading from the driver cavity to the LED. :weary: An easy fix! :sunglasses: