Review: Convoy M3-C. Single 26650, USB-C, XHP70.2, 4300lm, 365m throw

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Bort
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Good light, i ordered mine last year and got it around the end of January. It sat untested or a while until last month.
One thing i noticed is that if i use my (older) 18650s on full the light works for a few seconds then turns off. Not sure why, are my calls not high enough amp draw?

Also when i put the light down on a desk if blinks, the battery is not well secured.

Does it have temperature regulation (i get the impression it does).

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pennzy
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Yea, you need a good strong battery to run turbo or it steps down to low. The battery compartment is long on this light. I had to stretch the tail spring out to make good contact. It is thermally regulated but seems to not step down much on turbo. It has a lot of mass.

Bort
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pennzy wrote:
Yea, you need a good strong battery to run turbo or it steps down to low. The battery compartment is long on this light. I had to stretch the tail spring out to make good contact. It is thermally regulated but seems to not step down much on turbo. It has a lot of mass.

How does it know to step down to low if the battery is not strong enough?
I’ve had it step down on turbo, put in a fresh battery, put it on turbo, left it tail standing and 20 mins later reengaged turbo. Also i got about 80 ions on a 4500mAh battery, full output surely uses more then 4.5A.

The Journal of Alternative Facts TM

"It is critical that there is a credible academic source for the growing and important discipline of alternative facts. This field of study will just keep winning, and we knew that all the best people would want to be on board. There is a real risk in the world today that people might be getting their information about science from actual scientists"

 

pennzy
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The driver is regulated. Step down occurs at certain battery levels. My only gripe is that it steps down to low rather than to next lower level. It would be better is it went down to high from turbo. Mine usually drops at 3.5 volts. Your battery might not be able to supply the needed current to run turbo even if it is charged. Also make sure all your connections are clean.

Bort
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pennzy wrote:
The driver is regulated. Step down occurs at certain battery levels. My only gripe is that it steps down to low rather than to next lower level. It would be better is it went down to high from turbo. Mine usually drops at 3.5 volts. Your battery might not be able to supply the needed current to run turbo even if it is charged. Also make sure all your connections are clean.

Interesting, i will try a fully charged 18650.
I am not a fan of the UI, it has its moments but it has annoying quirks as well.

The Journal of Alternative Facts TM

"It is critical that there is a credible academic source for the growing and important discipline of alternative facts. This field of study will just keep winning, and we knew that all the best people would want to be on board. There is a real risk in the world today that people might be getting their information about science from actual scientists"

 

pennzy
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The UI definitely is a far cry from Anduril for sure. Doesn’t really bother me though. I usually run it on turbo only. That’s where this light shines, pardon the pun, it holds turbo or close to it without getting scorching hot. I get 4 short walks per charge on turbo before recharging.

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pennzy wrote:
The UI definitely is a far cry from Anduril for sure. Doesn’t really bother me though. I usually run it on turbo only. That’s where this light shines, pardon the pun, it holds turbo or close to it without getting scorching hot. I get 4 short walks per charge on turbo before recharging.

What battery are you using, i find it starts cutting brightness in minutes, though it will last 1 hour 20 mins on a fully charged 4500mAh 26650, most of it well under full brightness.

The Journal of Alternative Facts TM

"It is critical that there is a credible academic source for the growing and important discipline of alternative facts. This field of study will just keep winning, and we knew that all the best people would want to be on board. There is a real risk in the world today that people might be getting their information about science from actual scientists"

 

pennzy
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Shockli 5500 mah 26650. I added a tail spring bypass.

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pennzy wrote:
Shockli 5500 mah 26650. I added a tail spring bypass.

Nice, i am behind the times on my battery knowledge.

The Journal of Alternative Facts TM

"It is critical that there is a credible academic source for the growing and important discipline of alternative facts. This field of study will just keep winning, and we knew that all the best people would want to be on board. There is a real risk in the world today that people might be getting their information about science from actual scientists"

 

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Is it safe to use this light while its being USB charged?

The Journal of Alternative Facts TM

"It is critical that there is a credible academic source for the growing and important discipline of alternative facts. This field of study will just keep winning, and we knew that all the best people would want to be on board. There is a real risk in the world today that people might be getting their information about science from actual scientists"

 

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Bort wrote:
Is it safe to use this light while its being USB charged?

Mine works that way. Don’t see why is shouldn’t be safe.
easyshades
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pennzy wrote:
Bort wrote:
Is it safe to use this light while its being USB charged?

Mine works that way. Don’t see why is shouldn’t be safe.

hey so i just purchased this light based on your recommendation, im just scrolling through some reviews and stuff, you mentioned earlier that the charging ability is wonky.. is that the case still? does it happen once in a while or is it a reoccurring theme?
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I have the M3 and it’s a great light. I’d like to have the USB charging and the ramping UI of the M3C but just can’t bring myself to click the button. However, if Convoy ever offers the M3C in grey or tan it would be enough to push me over the fence.

I feel sorry for people who don't have a hobby or interest to escape to.

easyshades
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Notmyrealname wrote:
I have the M3 and it’s a great light. I’d like to have the USB charging and the ramping UI of the M3C but just can’t bring myself to click the button. However, if Convoy ever offers the M3C in grey or tan it would be enough to push me over the fence.

cant you sell your current one and buy the m3c?
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I have the gen 1 M3 also. Don’t need/want the USB charging. Ramping is cool but not a necessity. Great light BTW.

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easyshades wrote:
pennzy wrote:
Bort wrote:
Is it safe to use this light while its being USB charged?

Mine works that way. Don’t see why is shouldn’t be safe.

hey so i just purchased this light based on your recommendation, im just scrolling through some reviews and stuff, you mentioned earlier that the charging ability is wonky.. is that the case still? does it happen once in a while or is it a reoccurring theme?

My charger indicator light turns green too early. About 4.0 volts. It does keep charging past this point and terminates at 4.2 volts. I have a USB tester connected to the charge cable so I can tell when it finishes. One other thing to keep in mind is regulated lights need clean connection points to operate properly. All lights really. The battery tube ends and where they make contact with the tail cap and driver along with the spring and battery terminals need to be cleaned with alcohol occasionally or they will step down early. Good luck with your new light. I think you will like it. It is my go to for evening walks.
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easyshades wrote:
Notmyrealname wrote:
I have the M3 and it’s a great light. I’d like to have the USB charging and the ramping UI of the M3C but just can’t bring myself to click the button. However, if Convoy ever offers the M3C in grey or tan it would be enough to push me over the fence.
cant you sell your current one and buy the m3c?

It wouldn’t sell here and shipping to the US or Australia is expensive.

I feel sorry for people who don't have a hobby or interest to escape to.

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I tried out the USB charging for the first time, at 3.7V the light went green.
Tried removing the battery and reinserting, tried unplugging the USB brick, same result.
Even if it is charging how would one know when its finished without a charger that give amperage readings?

Right now i am draining a battery to see if it will work better on an empty battery.

The Journal of Alternative Facts TM

"It is critical that there is a credible academic source for the growing and important discipline of alternative facts. This field of study will just keep winning, and we knew that all the best people would want to be on board. There is a real risk in the world today that people might be getting their information about science from actual scientists"

 

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Usb charging is no substitute for charging with desktop charger. Personally, it’s nothing more tha another way for water to get into the light.

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zoulas wrote:
Usb charging is no substitute for charging with desktop charger. Personally, it’s nothing more tha another way for water to get into the light.

I can’t exactly re-mill the light.
Its got USB charging built into it so thats that.

But why is it no substitute?As long as it fully charges its fine, its not going to capacity test or test internal resistance or have a nice LCD that tells you how many mAh it put into the battery but i don’t see any harm in using it.

The Journal of Alternative Facts TM

"It is critical that there is a credible academic source for the growing and important discipline of alternative facts. This field of study will just keep winning, and we knew that all the best people would want to be on board. There is a real risk in the world today that people might be getting their information about science from actual scientists"

 

BurningPlayd0h
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Bort wrote:
zoulas wrote:
Usb charging is no substitute for charging with desktop charger. Personally, it’s nothing more tha another way for water to get into the light.

I can’t exactly re-mill the light.
Its got USB charging built into it so thats that.

But why is it no substitute?As long as it fully charges its fine, its not going to capacity test or test internal resistance or have a nice LCD that tells you how many mAh it put into the battery but i don’t see any harm in using it.

Charging curve (especially when it goes CC vs CV) can be less than stellar for cell life with onboard charging in some lights.

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BurningPlayd0h wrote:
Bort wrote:
zoulas wrote:
Usb charging is no substitute for charging with desktop charger. Personally, it’s nothing more tha another way for water to get into the light.

I can’t exactly re-mill the light.
Its got USB charging built into it so thats that.

But why is it no substitute?As long as it fully charges its fine, its not going to capacity test or test internal resistance or have a nice LCD that tells you how many mAh it put into the battery but i don’t see any harm in using it.

Charging curve (especially when it goes CC vs CV) can be less than stellar for cell life with onboard charging in some lights.


If it reports charged soon after hitting CV then thats actually an unintentional bonus.

The Journal of Alternative Facts TM

"It is critical that there is a credible academic source for the growing and important discipline of alternative facts. This field of study will just keep winning, and we knew that all the best people would want to be on board. There is a real risk in the world today that people might be getting their information about science from actual scientists"

 

BurningPlayd0h
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Bort wrote:
BurningPlayd0h wrote:
Bort wrote:
zoulas wrote:
Usb charging is no substitute for charging with desktop charger. Personally, it’s nothing more tha another way for water to get into the light.

I can’t exactly re-mill the light.
Its got USB charging built into it so thats that.

But why is it no substitute?As long as it fully charges its fine, its not going to capacity test or test internal resistance or have a nice LCD that tells you how many mAh it put into the battery but i don’t see any harm in using it.

Charging curve (especially when it goes CC vs CV) can be less than stellar for cell life with onboard charging in some lights.


If it reports charged soon after hitting CV then thats actually an unintentional bonus.

Yep, and FWIW I can’t remember what the charging graphs for the new Convoy lights have shown but I’d be pretty likely to trust them.

Just have the early days of USB charging ecigs (or cheap, crappy ones now) in the back of my head still.

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zoulas wrote:
Usb charging is no substitute for charging with desktop charger. Personally, it’s nothing more tha another way for water to get into the light.

I don’t use USB charging as a substitute for using a charger but find it very convenient sometimes. It’s useful when I’m in a hurry and want to add a little charge or top up before I go out the door and also when my charger is already full or I’m just feeling lazy. I don’t loan out my flashlight much anymore (I lost a few that way), but if I do I’d loan a light with USB charging.

Of course it’s possible for water to get in the light but it’s not something I worry about. I do have a diving flashlight I’d use if I was out in a typhoon or flood.

I feel sorry for people who don't have a hobby or interest to escape to.

pennzy
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Bort wrote:
I tried out the USB charging for the first time, at 3.7V the light went green.
Tried removing the battery and reinserting, tried unplugging the USB brick, same result.
Even if it is charging how would one know when its finished without a charger that give amperage readings?

Right now i am draining a battery to see if it will work better on an empty battery.


I use a USB tester on mine to tell when done. I was wondering if mine was the only one with this issue. I asked Simon about it but he changed the subject.
pennzy
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zoulas wrote:
Usb charging is no substitute for charging with desktop charger. Personally, it’s nothing more tha another way for water to get into the light.

Anymore, I won’t buy a light without it. To each their own.
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I am having a serious issue with my M3-C. The driver must be faulty (green) because it’s always been draining the battery when off. Someone on r/flashlights asked me to measure the draw on the M3-C and I measured 134.3mA when on (low setting) and 27.3mA when off. I am hoping Simon responds to my issue. Does he respond on BLF?

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axolotls wrote:
I am having a serious issue with my M3-C. The driver must be faulty (green) because it’s always been draining the battery when off. Someone on r/flashlights asked me to measure the draw on the M3-C and I measured 134.3mA when on (low setting) and 27.3mA when off. I am hoping Simon responds to my issue. Does he respond on BLF?

That is definitely unacceptable parasitic drain and probably a defective driver. Best way to contact Simon is probably through AE if that’s where you ordered from but he does pop into the official Convoy thread pretty often.

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Yep. I contacted him last night on AE. He read the messages but no response yet. I’ll PM him also. Thanks!

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Ugh I want to buy this but don’t know if I can accept the UI…is there any other single cell light that can sustain lumens as well? I’ve checked out the other common brands but don’t see anything.

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