Convoy M21B SST40 (2019) review
The Convoy M21B SST40 (M21BS) released in 2019. It uses Luminus SST40 LED, SMO reflector and 1 x 21700 Li-Ion battery. The powerful emitter in this flashlight provides up to 2300 lm output, 40000 cd intensity, and a beam distance of 400 m.
This light has 4 modes of lighting. The memory function is a nice feature, the light will remember the last used mode.
Table of contents:
Convoy M21B SST40 (M21BS) specifications
- M21B SST40
The aluminium body of flashlight treated with a Type III hard-anodized, anti-abrasive ﬁnish.
- 120 g
- 141.5 mm
- Body diameter
- 27.1 mm
- Head diameter
- 35.7 mm
- aluminium alloy with HAIII hard-anodized finish
The emitter of M21B SST40 manufactured by Luminus, a US-based LED manufacturer. The M21B SST40 has a smooth reflector. The properly focused smooth reflector gives you a more cohesive hotspot and therefore throws better. It has an AR coated lens.
- Luminus SST40 LED
- Color temperature
- 6500 K / 5000 K
- AR coated glass
- mechanical rear, forward clicky
The throw is the calculated distance in meters at which the flashlight produces a light intensity of 0.25 lux. The candela per lumen (cd/lm) ratio can be used to determine if a flashlight has a spot or flood type beam. Well-focused spot beams can be over 100 cd/lm, tactical flashlights are typically between 20-100 cd/lm, and work lights are less than 10 cd/lm.
- 2300 lm
- 40000 cd
- 400 m
- CD/LM factor
The M21B SST40 has mode memory. Mode memory means that the light will remember the mode you were using when the light was last turned off, and when you turn it on again.
- 4 modes
- Mode memory
- Ramping mode
The M21B SST40 cannot charge batteries directly. You may need an external charger to keep your battery going. This flashlight has a built-in low voltage protection (LVP) to prevent damage to the cell from over-discharge, so protected cells are not necessary. The built-in thermal control automatically adjusts brightness output to prevent overheating.
- 1 x 21700 Li-Ion battery
- Battery indicator
- Charger port
- Thermal regulation
- AUX LEDs
The lanyard prevents accidental loss of the flashlight.
- Package contents
The performance of the Convoy M21B SST40 flashlight is measured according to the ANSI / NEMA FL1 Standard 30 seconds after switching the light on. The ANSI/NEMA FL1 2009 Standard is a set of flashlight performance guidelines.
The specifications above are based on the official data published by the manufacturer, but we also take user reviews into consideration. If you found an error or something lacking in the specifications above for the Convoy M21B SST40, then don’t hesite and signal the problem to us.
Convoy M21B SST40 (M21BS) pictures
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