You use button top cells correct? I assume this light only takes button tops, but if it takes flat tops that would be better of course.
That is interesting! Then I will probably go for P26As, considering they are also cheaper than 30Qs.
I’m using flat - them works for me, not a single problem with connection, which is strange for me, because it shouldn’t work properly according to manual. 
Well that’s…confusing. Maybe I just have to wait until it arrives to see what will fit in there. Though I suppose the safest bet would be to follow the manual and just get 4x button top P26As.
Maybe your VTC5As have slightly protruding flat tops? Maybe you could take a pic of the contacts in the light?
Thanks to everyone for your help so far.
My Molicel P28A are button tops, I modified them with very little money by purchasing the buttons and then the PVC to cover them on AliExpress.
here are some photos from me - still unable to capture decent range shot, because in my country every evening is misty right now (warm days, cold nights), but at keast you can check beam profile 
thanx, have to consider this one.
8a per LED with Osram? never thought it can consume that much...
daylight, left - Haikelite MT41 4xPM1, right - Wurkkos TS30s SBT90.2
Haikelite with 4x Murata VTC5A, Wurkkos with Samsung 40T
Nice! Any way you can do a candela measurement?
I’m sorry, but I can’t. I even don’t have decent app for lumen measurement with runtime graphs on iOS. Maybe someone could recommend me something? I’m thinking about invest some $$ in gear this kind.
I have the MT41, and I also have the Haikelite MT40, I could compare it to the Astrolux MF02 (XHP35 HI) and the Fireflies T9R (Osram CULNM1) that I also have.
But I tell you a quick conclusion, the MT41 is a great buy.
tonight I found good air quality outside and shot some beam. Here is comparison of Emisar D4Sv2 with 4xosram W2 and our Haikelite MT41 with the same led - guess which is which 
Also tonight was first time I lit my MT41 powered by Murata VTC5A - I’m really impressed with turbo performance on those green batteries.
You can spend about 25€ for a decent lux meter on Aliexpress like the uni-t ut383S. I use it and it’s a decent meter for cheap.Ut383S $28.43 27%OFF | UNI-T UT383S Light Meter 200,000 LUX Digital Luxmeter Luminance Lux Fc Test Max Min Illuminometers Photometer 淘宝网 - 淘！我喜欢
Exactly they are the best batteries that you could use together with the Molicel P26A or P26A that I use on the MT41 which still remains a great flashlight!
...or P28A
Hi Fedro,
For the comparison, just to clarify is the Noctigon K1 version you have the one with the SBT90.2? I’m surprised it outperforms the L7 which is a good performer in it’s own right, just under 1300m of throw from 1lumen’s review.
Hello I confirm that Noctigon K1 SBT90.2 is superior to the L7 even if slightly despite the only 21700 battery which in any case must necessarily be of excellent quality in fact I use Molicel P42A, probably this is due to a better conceived dish and to a driver of undoubted quality. I recently bought Amutorch XT65 SBT90.2 and this too has proved superior to the L7, this does not mean that the L7 is a product not to buy, on the contrary it is certainly a great product and I am delighted to have it on the showcase but in the wake of this other manufacturers have sharpened their weapons and are responding with increasingly performing products.
What is the distance to the high voltage support. And what is the distance to the crane?
both about 500m
My MT41 arrived. I ordered from aliexpress. It looks like the lantern was collected by homeless people in the basement. The reflector is covered with small scratches. A half-erased fingerprint is visible inside the reflector. Most likely rubbed with a rag. Convoy 4X18A SBT90.2 hits a little further. Possibly due to reflector damage, did not outperform 4X18A. Used original Murata VTC6 batteries.
What is the beam profile like compared to Convoy 4X18A SBT90.2? Is it a bit more floody?