Convoy S21A (Short Technical Review)

A half click cycles through levels.

Using a Samsung 40T produced the same output levels. Per my SC700d review HERE, the 48G was able to drive the Zebralight SC700d to 3,000 lumens with no problem (so 2,000 lumens would not be an issue on the S21A).

thanks. guess ill buy some Samsung 50e’s since it makes no difference.

My quick video demo on Convoy S21A w/ SST-40:

Hi, I decided to check out a "S21" light as sold on ebay and it must be similar to the one being discussed. On the side it says "Manta Ray" and S21. Not a bad light for $22.28 shipped from China.

Battery Configurations: 1x21700 or 18650 3.7v, mine seems happy with a 18650.

Options: Luminus SST-20-W LED (6500K/5000K/4000K/3000K) - I ordered the 5000K which looks OK, has kind of blue/purple rings around the outside. Would have got the 4000K if I new what I know now. Emits a whine at the lower modes but I can only hear it close to my ear.

Ebay Description: S21 luminus SST-20-W stepless dimming light 21700/18650 Battery LED flashlights.

I also ordered a "Convoy S2 + Mit Luminus SST20 4000K Military Flashlight Hunting Tactical Torch" which looks similar and is cheaper after shipping, but it's not here yet.

-Dick Locke p.s. I'd post a picture but not able to, only a link? New to this forum so not sure what's up with that.

p.p.s. Let's see if I can add a pic...

[img]https://i.imgur.com/BddkUph.jpg[/img]

https://imgur.com/BddkUph

@dtlocke, post a link, and I’ll show you what to do.

Embed a pic - looks like this will embed a pick of the S21 “Manta Ray” from ebay…

S21 Manta Ray from Ebay

Thanks for the review.
Ordered one. When it comes will give feedback.

I have feeling that this will be very stupid question, but

I have just got new s21a from simon

is it OK if the light head is ratling? whole inside part is moving and glass is free to rotate and move…

Shouldn't do that.

(1) Make sure the pill is screwed all the way down. There are two notches on the pill - you can use needle-nose pliers to screw it all the way down.

(2) Make sure the O-ring wasn't left out (behind the lens).

max temps on convoy s21a

Would be interested a comparasion betwen S21A and S2+,same power config Driver and Led
wich of them dissipates better heat

My Convoy S21A.

It will be the same, as it have temp. control, so both will be stucked on 55°C :slight_smile:

and btw, I dont thing that there will be any noticeable difference, as they are nearly 1:1 copy

depend wich arrive later at 55°C
That mean it have better heat management
but yes they are very similar,apart pill S21A that I like much,hope to see this pill in copper for single and triple/quad.

Spring bypass just ripped off from spring after 3months… On both sides

I guess its ’cos cable isolation become very stiff due to heat

At least it is easily repairable! The reverse threading of the switch end can be a bit of a pain though.

I wonder how the SST40 would perform with a straight FET+7135 driver in the S21A?
So far I’m adoring the Cree XPL2-HD with the MTN-20DDm in the S21A.

I use solder wick, massive current flow and worry free

I’ve seen solder wick broken so many times I won’t use it for a bypass, don’t even own any. I use Turnigy wires and always try to put a bit of a coil on them so they compress rather than bend. :wink:

One more question:

How it is with waterproofness on this light? Can it survive dipping into water for few minutes?

It does have the required gaskets and if ya build it right, they should do the job of protecting itself from the occasional dip a puddle.