[Review] Convoy S12 ( 3 x SST-20 / 219C, 21700 ) - Output, Power and Thermal Regulation Tests!

26 posts / 0 new
Last post
bilakos10
bilakos10's picture
Offline
Last seen: 8 hours 24 min ago
Joined: 08/22/2013 - 14:25
Posts: 1418
Location: ~ Earth
[Review] Convoy S12 ( 3 x SST-20 / 219C, 21700 ) - Output, Power and Thermal Regulation Tests!

The flashlight was sent to me by Convoy for review.
Here's the flashlight's page: Convoy S12

The Convoy S12 arrived in a simple cardboard box.
No fancy packaging, which is totally acceptable considering the quality and pricing of the brand's flashlights.



The S12 has a very nice, matte black anodization.



Here's a closer look at the head's mildly deep heat-sinking grooves.
The machining is very good and the design of the heatsink also creates an anti-roll surface.



The head's lens is protected by a polished, heavy metal bezel.



Of course, the most exciting thing in the flashlight is its triple emitter setup.
Contradictory to most triple flashlights, the S12 it using a smooth metal reflector.
Both Nichia 219C and SST-20 emitter options are available. In this setup I have chosen the SST-20 4000K.



The rear switch is reverse-clicky.
Thanks to the protruding metal flaps, the flashlight can tail stand.



The head houses the 6A constant current driver which is held in place via a brass retainer ring.
A spring bypass has been performed by the factory to increase efficiency.



Here's a close-up look at the other side of the driver.



The tail also comes with a spring bypass and a brass retaining ring.



Here's the tail completely taken apart.



And a couple of shots of the switch PCB.

 

The threads of the flashlight are super smooth.
The tail's threads are square cut and anodized, which allows the flashlight to be mechanically locked out.



The head's threads are also square cut and very clean.



User Interface
The S12 comes with a very simple UI.
Here's all the supported actions:

Turn on/off: Single press
Mode cycle: Half press (Low > Med > High > Turbo > Low > ... )

Mode memory is present.
The flashlight will start blinking once the battery's voltage is lower than 3.2V (on Turbo/High) or 3.0V (on Medium/Low).

Output
I measured the output of the Convoy S12 using an Imalent 21700 cell.
Here's the output along with the corresponding current draw.


Being operated by a mechanical switch, there's no parasitic drain while the flashlight is off.

Power and Thermal Regulation
Here's a V/A graph that I created using my bench PSU.



What we can see in the graph:

  • Turbo is regulated down to 3.7V
  • Once the battery < 3.7V Turbo's output is proportional to the input voltage.
  • High, Medium and Low are fully regulated for the whole span of the operating voltage.


And here's a Thermal Regulation graph of Turbo.



What we can see in the graph:

  • Turbo's full output is sustained for 3 mins.
  • After the 3 min mark, the output starts to slowly stepdown in order to keep the temperature stable.
  • At the 5min mark, the stepdown is complete.
  • The stepped down brightness is 1000 lumen and is fully sustainable.
  • The flashlight's head and body never got too hot to touch.

Beamshots

For the last part, here's a wall beamshot just so you can see the profile of the beam (the color rendering is not totally accurate).



I will add some outdoor beamshots as soon as I can pay a visit to my village Smile

Edited by: bilakos10 on 09/22/2019 - 15:46
Di_Joker
Di_Joker's picture
Online
Last seen: 5 min 7 sec ago
Joined: 02/21/2018 - 08:07
Posts: 326
Location: RU

Excellent and concise review
bilakos10

Quote:
The stepped down brightness is 1000 lumen and is fully sustainable.

Do you have the opportunity to measure the temperature of the head and body of a flashlight after 20 minutes of operation at a brightness of 1000 lumens?

Sorry for my poor english.

Yokiamy
Yokiamy's picture
Offline
Last seen: 7 hours 43 min ago
Joined: 10/18/2016 - 15:47
Posts: 2662
Location: Netherlands

Can you take a picture of the driver?

bilakos10
bilakos10's picture
Offline
Last seen: 8 hours 24 min ago
Joined: 08/22/2013 - 14:25
Posts: 1418
Location: ~ Earth

Di_Joker wrote:
Excellent and concise review *bilakos10*
Quote:
The stepped down brightness is 1000 lumen and is fully sustainable.
Do you have the opportunity to measure the temperature of the head and body of a flashlight after 20 minutes of operation at a brightness of 1000 lumens?

Unfortunately I don't have a digital temperature probe.
I should probably get one as it's pretty cheap.

Yokiamy wrote:
Can you take a picture of the driver?

Sure, here's the best one I could capture.
Yokiamy
Yokiamy's picture
Offline
Last seen: 7 hours 43 min ago
Joined: 10/18/2016 - 15:47
Posts: 2662
Location: Netherlands

Looks like it is using Simons 1 cell 6A driver, where it is very easy to remove the temperature regulation.

Warning, doing this is solely at your own risk, Result will be no stepping down anymore (and more heat) Here you will find more info.

djozz
djozz's picture
Offline
Last seen: 6 hours 24 min ago
Joined: 09/07/2012 - 17:04
Posts: 17208
Location: Amsterdam

Any suggestion if a pencil trick will work on which cap to remove mode memory on this driver?

fluke
Offline
Last seen: 3 weeks 5 days ago
Joined: 04/20/2018 - 13:58
Posts: 499
Location: London United Kingdom

Is this the same switch as on the S11?

 

EDIT: Is this mod possible on the M3?

hasddie293
hasddie293's picture
Offline
Last seen: 4 hours 1 min ago
Joined: 03/05/2019 - 08:53
Posts: 309
Location: Brunei

2541 Lumen yes!! Within my range expectation. This was 4000k, not to mention 5000k, I sure they will be happy to hear it. Still awaiting S12 to arrived…

Apart from brightness, the current regulation seem to be pretty well hand. Constantly slow as can been seen amp/v graph. Good efficiency.

Next thing I want hear is how much can it throw. I been known SST20 for it throwish, but I really expect it to flood though due to its triple led. Can it handle mid throw range?

Awesom light from convoy anyway! Well craftmanship and I devote it sexy body Love

In search of the most ideal flashlight in town:
1. BRIGHTNESS
2. Durabillity
3. Design
4. Quality
5. Price$$$

Yokiamy
Yokiamy's picture
Offline
Last seen: 7 hours 43 min ago
Joined: 10/18/2016 - 15:47
Posts: 2662
Location: Netherlands
fluke wrote:

Is this the same switch as on the S11?


 


EDIT: Is this mod possible on the M3?

Yes, i remember someone else asking it, who i helped. there are instructions on blf, only don’t remember which thread

KevinZA1988
KevinZA1988's picture
Offline
Last seen: 3 weeks 1 day ago
Joined: 02/26/2018 - 02:26
Posts: 765
Location: South Africa

How is 2500 lumens possible with 3x SST-20 4000K 95CRI if tests have shown a single emitter does around 537 lumens 2A? According to those tests this light should do about 1500-1600 lumens 6A.

I have a Jaxman E2L with 3x SST-20 3000K 95CRI and a LD-B4 driver set to 6A max current. The 3000K LED’s emits around 1350 lumens with a Carclo 10511 optic installed.

Armytek Prime C1 Pro, Armytek Prime C2 Pro, Armytek Tiara C1 Pro, Astrolux MF01 Mini, BLF Q8, BLF A6, BLF FW1A, BLF FW3A, BLF FW3C, BLF LT1, Convoy L6, Convoy C8+ , Convoy S3, Convoy M21A, Convoy S11, Emisar D4, Fireflies E07, Jaxman E2L, Lumintop EDC18, Manta Ray C8.2 long version, Olight S1R Baton II special edition series, S2R Baton II, Nitecore HC65, Olight H1R Nova.

https://photos.app.goo.gl/JaJaDv4V838AEJf39

Tangra
Offline
Last seen: 1 day 12 hours ago
Joined: 08/01/2016 - 05:33
Posts: 476
Location: Europe

Thanks for the review. I am waiting it from long time. Looks like this is perfect bike flashlight.
Found on youtube:

Convoy S12 (3x SST20-4000k) vs Convoy S2+ (SST40 5000k)

Astrolux S41S 4×219B vs Convoy S12 3xSST20 4000k

everydaysurvivalgear
everydaysurvivalgear's picture
Offline
Last seen: 2 days 11 hours ago
Joined: 07/31/2015 - 10:25
Posts: 3630
Location: sydney australia (GMT+10)

Thanks for the review mate.

These are the 90+ CRI LEDs?

Output seems a bit high for 6amps i would expect like 1600-1800 lumens max. Still great efficiency high output high CRI light.

MiG0
Offline
Last seen: 5 months 3 weeks ago
Joined: 02/28/2016 - 04:56
Posts: 127

How a 18650 battery is fitted (if it can be fitted)?

hasddie293
hasddie293's picture
Offline
Last seen: 4 hours 1 min ago
Joined: 03/05/2019 - 08:53
Posts: 309
Location: Brunei

Well, it seem pretty much high indeed for 6amp driver. Don’t know how to say. But he seem to use Imalent 21700 battery Flat Stare I’m not really sure if that relate with higher lumen.

Probably it should be around 1800ish lumen, it been mention before..

KevinZA1988 wrote:
How is 2500 lumens possible with 3x SST-20 4000K 95CRI if tests have shown a single emitter does around 537 lumens 2A? According to those tests this light should do about 1500-1600 lumens 6A.

In search of the most ideal flashlight in town:
1. BRIGHTNESS
2. Durabillity
3. Design
4. Quality
5. Price$$$

KevinZA1988
KevinZA1988's picture
Offline
Last seen: 3 weeks 1 day ago
Joined: 02/26/2018 - 02:26
Posts: 765
Location: South Africa

hasddie293 wrote:
Well, it seem pretty much high indeed for 6amp driver. Don’t know how to say. But he seem to use Imalent 21700 battery Flat Stare I’m not really sure if that relate with higher lumen.

Probably it should be around 1800ish lumen, it been mention before..

KevinZA1988 wrote:
How is 2500 lumens possible with 3x SST-20 4000K 95CRI if tests have shown a single emitter does around 537 lumens 2A? According to those tests this light should do about 1500-1600 lumens 6A.

You can use a battery that can supply 30A, it won’t make a difference. This is a regulated driver from Convoy. I have a few, and I’ve never seen them pull more than 6A. There’s something wrong with his measurements.

My FW3C also has the SST-20 3000K from BlueSwordM group buy and on turbo it obviously runs full FET and it draws 14.1A (4.7A per LED) on turbo with a fresh 30Q cell. Not even that light does 2500 lumens. I measured around 2130 lumens.

Armytek Prime C1 Pro, Armytek Prime C2 Pro, Armytek Tiara C1 Pro, Astrolux MF01 Mini, BLF Q8, BLF A6, BLF FW1A, BLF FW3A, BLF FW3C, BLF LT1, Convoy L6, Convoy C8+ , Convoy S3, Convoy M21A, Convoy S11, Emisar D4, Fireflies E07, Jaxman E2L, Lumintop EDC18, Manta Ray C8.2 long version, Olight S1R Baton II special edition series, S2R Baton II, Nitecore HC65, Olight H1R Nova.

https://photos.app.goo.gl/JaJaDv4V838AEJf39

hasddie293
hasddie293's picture
Offline
Last seen: 4 hours 1 min ago
Joined: 03/05/2019 - 08:53
Posts: 309
Location: Brunei

If not battery, how about this one he mention…possible make a different? I still doubt though. Unlike other reflector which is using aluminium part. Or else he could possibly wrong.3

bilakos10 wrote:
Contradictory to most triple flashlights, the S12 it using a smooth metal reflector.

In search of the most ideal flashlight in town:
1. BRIGHTNESS
2. Durabillity
3. Design
4. Quality
5. Price$$$

bilakos10
bilakos10's picture
Offline
Last seen: 8 hours 24 min ago
Joined: 08/22/2013 - 14:25
Posts: 1418
Location: ~ Earth

Guys now that I am looking at the output numbers,they indeed seem a bit high.

I am speculating that I might have forgotten to adjust the final numbers using the correction factor I use in all of my tests Smile
I will take another set of measurements and report back tomorrow night!

Tangra
Offline
Last seen: 1 day 12 hours ago
Joined: 08/01/2016 - 05:33
Posts: 476
Location: Europe

Hello bilakos10,
Thanks for the review.
Do you have any beam shots of S12 and comparison with other Convoy lights ?

almax1800
Offline
Last seen: 10 months 3 weeks ago
Joined: 09/16/2019 - 18:42
Posts: 12

Great review man, thank you. I got the Nichia version @ 4k, warmer than what I’m used to but am getting used to it. Beautiful beam quality and a good looking light too. I like the idea of the simple 4 speed UI but for my applications I need another gear a 3.5 or medium high up around 60% (mode 3 is only 30%) especially for lean hot rods like this that might quickly need turbo relief. Brings up another thing, my model does not seem to step down at all and will keep turbo going until I cry uncle and turn it down (or put it down). I don’t mind that though and the tail switch is stiff and well protected. Might be a fire hazard with a side switch light. Anyway I like it, it’s a keeper. Unlike my M4U which despite a better UI (but still with the 4 speed problem) is way too weak for my hand to gravitate towards it at walk time. So many better compact combo/throwers at similar value.

Almax

Eneen
Offline
Last seen: 2 months 2 weeks ago
Joined: 09/11/2019 - 03:39
Posts: 16
Location: Poland

@Tangra have you tried this light? Is spot large enough and spill soft?
Will Nichia 219C have similar output as SST20?
If I’m calculating correctly this one has about 140lm/W, it’s far more then XHP50.2 inside KDIY KF8 (108)…

d_t_a
Offline
Last seen: 17 hours 53 min ago
Joined: 08/04/2017 - 23:58
Posts: 2057
Location: Manila, Philippines

Tangra wrote:
Thanks for the review. I am waiting it from long time. Looks like this is perfect bike flashlight.
Found on youtube:

Convoy S12 (3x SST20-4000k) vs Convoy S2+ (SST40 5000k)

Astrolux S41S 4×219B vs Convoy S12 3xSST20 4000k

I feel flattered when someone posts videos I made. Thanks for posting them. Smile

In my beamshot comparison, my guesstimated lumens (Convoy S12 with 3x SST20-4000k) is somewhere around 1300+ lumens, definitely not more than 1500 lumens.
*guesstimated = based on comparison with flashlights that indicate lumens values (but I don’t have a way to directly test lumens either…)

I’m getting just around 5.5+ Amps on the tail current (using Liitokala Lii-40A 4000mAh 21700 battery, Those are the ones I used in the above video)

another comment on the 21700 body tube:
The Convoy S21A, M21A, M21B, L21A, (these 4 flashlights use 21700) body tube will not accept the slightly thicker Lii-40A 21700 battery, but the S12 body tube is a bit bigger and accepts the slightly thicker Lii-40A 21700 battery.

Tangra
Offline
Last seen: 1 day 12 hours ago
Joined: 08/01/2016 - 05:33
Posts: 476
Location: Europe

I was about to order S12, but on 30% level output S12 is lower then S21A at same mode.
According this review http://budgetlightforum.com/node/67612 S21A has 683 lumens at 30%. S21 estimated has 500 lumens at 30%.

Eneen
Offline
Last seen: 2 months 2 weeks ago
Joined: 09/11/2019 - 03:39
Posts: 16
Location: Poland

@bilakos10, could you do some measurements? I need bezel depth from edge to pcb support plate and locking ring height and smaller internal diameter.

darklight
Offline
Last seen: 12 months 4 days ago
Joined: 09/16/2019 - 06:23
Posts: 4
Location: Idiocracy aka Germany

i’m interested at the runtime in medium?
i’m a complete noob, so can i just divide the ampere power of the battery (18650/15A) through the 1700mA and then ending in a running time of about 1.5 hours?

bilakos10
bilakos10's picture
Offline
Last seen: 8 hours 24 min ago
Joined: 08/22/2013 - 14:25
Posts: 1418
Location: ~ Earth

darklight wrote:
i'm interested at the runtime in medium?
i'm a complete noob, so can i just divide the ampere power of the battery (18650/15A) through the 1700mA and then ending in a running time of about 1.5 hours?


Yes, calculating the runtime of a fully regulated mode (high, medium, low) just requires to divide the battery's capacity by the current draw.
Let's assume we got a 4500mAh cell.

Runtime (High) = 4500 / 1730 = 2.6 Hours
Runtime (Medium) = 4500 / 140 = 32 Hours
Runtime (Low) = 4500 / 9 = 500 Hours
hasddie293
hasddie293's picture
Offline
Last seen: 4 hours 1 min ago
Joined: 03/05/2019 - 08:53
Posts: 309
Location: Brunei

So far I loved using the S12 sst20 2700k, it doesn’t hurt my sight and it probably much comfortable than the 6500k tint. Very small, I mean compact style and design, knurling and fins I like it.

In search of the most ideal flashlight in town:
1. BRIGHTNESS
2. Durabillity
3. Design
4. Quality
5. Price$$$