Adding some grease to the O-ring, will it improve it?
Would this be enough?
Simon,
Have you checked new M3-C ramping speed?
The lighted switches fit generally 18650 lights. In S21A he uses different switch and they don’t fit directly. Unless I miss something. Simon?
Grease fixes it but as mentioned, dust particles will then stick to it and get inside.
I think the issue is that the oring isn’t tight enough around the body. Sounds as if the friction is the issue. I installed a small S2+ oring and it was fine but it’s too small to seal it from water
This is somewhat off topic, but if I accidently click order received in AliEx before its actually arrived nothing really happens right? I prematurely clicked to confirm receipt while I was fiddling around with the mobile app just now
I think once you confirm that you received the order it means the seller will get paid and you can’t complain about not receiving the goods.
You get 15 days of buyer protection and then you’re not covered. Hope it was nothing too costly
Yeah I figured that. But probably not much else right?
Yeah I figured that too. It wasn’t that costly, just one of the lights I’ve been waiting on from Simon.
I saw one of the reviews here for “Gray convoy S21A with luminus sst40”, where a customer mentioned that he requested for Simon to add the lighted cap for his S21A. There’s even a picture of it. Check review with photo dated 19-Oct-2020.
However the customer didn’t go into detail whether the spring with lighted cap has that bypass wire. When purchased separately, the blue/orange lighted caps have no bypass wire.
If it is a package from Simon it will reach home. Just have faith.
You can also “talk with Eva” for a little while until you get in contact with some customer service agent, and report them such a thing. They should fix it. You may need to tell Eva a few lies, though.
So it’s not just me randomly choosing options and complaining about not receiving parcel etc. just to ask a real person about why is not my feedback visible? 
Hey Bro, you look like new here. As a Pole, please let me welcome you here on behalf of all the users.
Convoy makes mostly lights with a reflector which means there’s a hotspot and some (depending mostly on reflector shape) spill.
In my opinion the most flody is Convoy Z1, which can zoom the beam. By rotating the head you make the beam wide or narrow. Contrary to reflector flashlights, zoom (aspherical lens) give you more uniform beam with no hotspot. But ZOOMies has their disadvantages. Among others, they are difficult to make them airtight and they loose some light (which is emitted on too small angle to hit the lens). So if you don’t mind the disadvantages, a zoomie can give you both: focused or wide beam.
Alternatively you might want to search for flashlight with TIR lens. TIR lens replaces reflector, also loses some power (but not as much as zoomie), but can mix the beam and regulate it’s width permanently.
Today I’ve received Seeknite X6s and I’m really impressed by it. It’s like Astrolux X6, beautiful Nichia 90+ CRI beam and lots of flood. Actually it’s way more floody than Emisar D4s with XP-L HD. It’s still available and the price is IMHO awesome considering what you get.
Anyone knows the Cut Off Voltage for M21C-U XHP70.2 with the new ramping driver
Does it have Low Voltage “Protection” or just Low Voltage “Warning”
The listing shows
Is the S21B compatible with the new 8A buck driver? I’m not interested in the output so much as the additional efficiency.
My S21B flashes out 5 Volts at battery check with a recharged battery 
It seems to be correct if voltage is under 4.00V.
Well, the 8A single cell buck driver is ∅22mm so for as long as the S21B uses a ∅22mm driver it should be compatible.
I think the S21B uses a ∅20mm driver, but since the S21B host advertisement lacks this information the only thing worth saying is the following: Simon, pay attention and good care of the information provided with your products. Your product advertisements must provide all customer required information.
Now that I'm here, I will also seize the opportunity to say that as a rule anti-reflective coated lenses damage the tint and CRI of flashlights. This of course is a way to tell Simon that some customers would prefer to order flashlights with good quality non-coated lenses, namely those who care for tint and CRI and less about throw.
You can read more about AR-coated lenses here and in the thread: AR Lens coatings - just a gimmick?
Single layer AR-coated lenses increase output very little and the price is the obvious “beam greenery”. The solution is multi-layer AR coatings (5+ layers), or no coating.
The information on the driver diameter has been kind of inconsistent, as you said the host listing is sparse, and the only information I’ve been able to find was this comment saying it was 22mm and this comment asking about using a 20mm to 17mm adapter to put in a different driver.
Well, that's odd cothyhu77. Better then wait until Simon notices all of this and decides to answer himself.