Convoy M2 Flashlight Review

Trying to review all the Convoy lights!  That’s a massive task, but still something I’d love to do…. Today I have for review the Convoy M2, a mid range 18650 thrower, with Biscotti firmware.  Read on for more!

Official Specs and Features

Here’s a link to the official product page on GearBest – this is a referral link.


There are many versions of the M2, including some with different firmware.  There seems to be only one emitter option for the Biscotti firmware, though.


This version of the M2 currently goes for $25.99.

Short Review

This is a fun little light.  Fairly good throw, but still having a very slim profile – pocketable, even.  All this makes it an inexpensive entry to the throw category!

Long Review

The Big Table

Convoy M2 (7135 * 8, with Biscotti)
Emitter: Cree XP-L HI (Cool White (6500K) )
Price in USD at publication time: $25.99
Cell: 1×18650
Turbo Runtime High Runtime
LVP? Yes
Switch Type: Mechanical
On-Board Charging? No
Claimed Lumens (lm) 992
Measured Lumens (at 30s) 851 (85.8% of claim)*
Claimed Throw (m) 150
Candela (Calculated) in cd (at 30s) 1141lux @ 5.057m = 29179cd
Throw (Calculated) (m) 341.6 (227.7% of claim)*
All my Convoy reviews!

* Standard 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).

What’s Included

  • Convoy M2 Flashlight
  • Lanyard (attached)
  • Pocket clip (attached)

Package and Manual

The M2 ships in a standard Convoy box.  There is no manual.

Build Quality and Disassembly

I’ve always found Convoy lights to be adequate for their price range, but I have to say that this M2 is probably better built than its price range.

The head has a good bit of fairly deep fins, and a teardrop design hiding in there.

The tailcap has a brass retaining ring, holding in a thick spring.

The threads on both the head and tail end of the cell tube are anodized, and thick square cut.  The’re also well lubed.

The cell tube is not reversible.  The tailcap has longer threads, and is also narrower in diameter than the head connection.

The head has a thick spring, too.

The spike bezel unscrews easily, and all the components come out easily.  The soldering inside here looks just a little sloppy.

When putting things back together it’s a little hard to get the o-ring to play nice.  Just push down on the lens a little while screwing down the bezel, and it’ll work right.

Size and Comps

Here are my measurements:

Length: 134.27mm
Head diameter (at thickest): 31.65mm
Body diameter (at thinnest): 23.35mm

Retention and Carry

Two ways to carry the M2 are included, and the are both attached from the factory.

First is the pocket clip, which is a friction fit clip attaching only on the tail end, and not allowing for much of a deep carry.  It does look like one of the cheap clips, but it’s actually not really all that bad.  The edges are finished, and it’s a bit thicker than the low quality clips.

Second is the lanyard, which attaches through two holes in the tailcap.  It could be moved to the pocket clip, too.  The pocket clip certainly seems snug enough to hold the lanyard.

Power and Runtime

The M2 is intended to be run on a single 18650 cell.  With springs on both ends, any type 18650 should work fine (flat or button top, protected or unprotected).  And with the relatively low power requirements, just about any 18650 will be just fine in this light.

The cell sticks out a bit.  (This Efest is quite long, though.)

Here are two runtimes.  Turbo first, where I measured around 850 lumens (below spec, but not that far below.)  Output more or less seems to track cell voltage, and drops off heavily after a certain point.  The light steps way down, and finally shuts off.

High runtime is basically the same characteristic.  The light never really heats up much, and at the end of the cell charge, output steps down dramatically.  The light also shut off at over 3V in this test, too.

Modes and Currents

Mode Mode Claimed Output (lm) Claimed Runtime Measured Lumens Tailcap Amps
5 851 2.66
4 359 1.27
3 0.34
2 0.06
1 ~


There’s PWM on all modes except Turbo.  I don’t find it to be bad PWM, though, as I don’t  really notice it on any mode.  IE, the PWM is “fast.”

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!

User Interface and Operation

There’s a single clicky on the M2.  It’s a mechanical tailswitch – a reverse clicky.  It’s a big switch with some texture for grip, a fairly low action, and very clicky.

The firmware here is Biscotti, and is probably best represented by the following flow chart.  There are many possibilities for the light and setup, including mode memory (or not), and 12 selectable mode groups.

Here’s a UI table!


State Action Result
Off Click Low (if no Mode Memory disabled (default)), Next Mode (if MM enabled)
On Click Off
On Tap Mode advance
On Long tap (>0.5s) Reset to Low (if no MM), No action (if MM enabled)
On Tap >10x Configuration Mode*

* Configuration mode allows a few things to be changed.  Once configuration has been entered, the light will stop responding to repeated taps.  Stop tapping, and the light will flash once, then “buzz” (very fast, low strobe).  Click during this strobe to enter group selection.  (Clicking the light completely off will work, as will tapping, in every case I’ve tested.)  Once in group selection, the light will blink for mode group numbers.  Click (or tap) the light after the count of the group you want, and you’ve set the group.  Ie if you want group 3, wait til the light blinks one blink, then pauses, blinks twice, pauses, blinks three times, and click during this pause.

If no click is made during the first buzz, the light will flash twice, then buzz again.  Click during this to iterate mode memory (on or off).

LED and Beam

The emitter is a cool white Cree XP-L HI, and there’s a very smooth, deep reflector.

These beamshots are always with the following settings:  f8, ISO100, 0.3s shutter, and manual 5000K exposure.

Tint vs BLF-348 (Killzone 219b version)

I compare everything to the Killzone 219b BLF-348, because it’s inexpensive and has the best tint!

Random Comparisons and Competitive Options….

Here’s a link to a relevantly filtered page on  I use that site a lot!

To be honest there’s not a lot that competes in this price range.  It’s not a complicated feature set, but the throw coupled with the price make this a great value!


What I like

  • Cree XP-L HI is one of my favorites (and great for this light)
  • Build quality is very good
  • Low price
  • Emitter swap should be easy
  • A bunch of mode groups with Biscotti firmware

What I don’t like

  • Only CW is offered


  • This light was provided by GearBest for review. I was not paid to write this review.
  • This content originally appeared at  Please visit there for the best experience!
  • Whether or not I have a coupon for this light, I do have a bunch of coupons!!  Have a look at my spreadsheet for those coupons. It’s possible to subscribe and get notifications when the sheet is edited!!

Author: zeroair

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