Details Convoy m21b LED
- Which has a simple 4 modes for switching, which is very suitable for ordinary users.
- Modes : 0.1%-3%-30%-100% max current output is 5000mA
- Its biggest advantage is that no frequency can be seen in any mode, and there is temperature management.
- It can control the flashlight temperature not to exceed 55 degrees Celsius,
- If the flashlight temperature is below 55 degrees Celsius, it will output full current. If it is above 55 degrees Celsius, it will constantly adjust the current so that the flashlight will not overheat.
Max current output is 6000mA Convoy m21b
Its biggest advantage is that no frequency can be seen in any mode, and there is temperature management.
It can control the flashlight temperature not to exceed 55 degrees Celsius,
If the flashlight temperature is below 55 degrees Celsius, it will output full current. If it is above 55 degrees Celsius, it will constantly adjust the current so that the flashlight will not overheat.
Convoy M21B Flashlight Review
Convoy has released a new 21700 cell light. It’s a single emitter thrower style light. Read on for some testing!
Measurement disclaimer: I am an amateur flashlight reviewer. I don’t have $10,000 or even $1,000 worth of testing equipment. I test output and such in PVC tubes!! Please consider claims within 10% of what I measure to be perfectly reasonable (accurate, even).
Typical Convoy package. Usually these get to me quite beat up. But the contents don’t show any wear.
There is no manual included.
Convoy m21b Build quality is exactly on par with other Convoy lights. No better, no worse. Considering that it’s only $27, it’s exceptionally well built.
The head has acceptable cooling and mass for the 5A 100% output. The cell tube removes quite easily and has big beefy square cut thread on both ends. The anodized threads means that the light can be mechanically locked out easily (even past the lockout that the mechanical switch provides). The cell tube is reversible, too. Both head and tail end have springs.
The bezel unscrews easily, and the aluminum reflector comes out, too. And both springs already have the spring bypass. This reveals the emitter, which has a nice big centering ring. Swapping the emitter should be a breeze. It’s a fairly good handling light. It could have more mass in the head, and/or a larger reflector and not suffer, but it’s good as-is.
There’s really only the lanyard for retaining the light. There are holes in the tailcap for attachment, and the lanyard ships already installed. Actually it ships installed a little incorrectly, since the better way would be to loop it through two holes instead of just one. This would allow easier tailstanding.
Primary power for the M21B is a single 21700. With springs on both ends, any type 21700 should fit and work just fine. The M21B will also work with other cells like 18650 or 20700, too.
You’ll likely want a fairly high quality cell, because the Convoy m21b draws around 5A on 100% output. Here’s a runtime on 100%. Basically the light starts at 100% and then tracks down just a little before settling out at around 1550 lumens. After that output falls as cell voltage falls. There isn’t LVP, but the main (ie only) emitter flashes to alert to low voltage at around 3V. This flash is noticeable and quite dramatic because at this point the output can still be as high as 700 lumens. So a flash from 700 lumens to off for a second is quite noticeable.
For reference, here’s a baseline shot, with all the room lights off and almost nothing hitting the sensor. And here’s the worst PWM light I have ever owned. Also one of the very first lights I ordered directly from China!
The switch is a very Convoy switch: mechanical tailswitch – a reverse clicky. It’s a big switch with some texture for grip, a fairly low action, and very clicky.
Neither the Convoy official page nor the BangGood page describe the UI of this light. And with no manual, I’m kind of just free wheeling it. That said, it’s probably mostly like other single switch Convoys – the T2 for example. This does not seem to be Biscotti.
The emitter in my review copy is a 6500K Luminus SST-40. Also available is a 5000K option. The deep wide reflector is very smooth. These beamshots are always with the following settings: f8, ISO100, 0.3s shutter, and manual 5000K exposure.
This light was provided by BangGood for review. I was not paid to write this review.
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