Convoy/EDC

Convoy M21B

Name: Convoy M21B
Brand: Convoy
Price: 23 USD
Availability: InStock

Simon's do-it-all 21700 workhorse. The M21B with the high-CRI XHP70.3 HI puts out over 2,000 gorgeous lumens with 300m+ of reach for around $30 — the standard answer for a budget outdoor light. Pick your emitter; every option is a bargain.

Beam profile

Balanced, about 19° wide. A usable hotspot with enough spill to see around it.

Estimated from 2,300 lm ÷ 26,800 cd — how this works

$23

Buy direct from Convoy on AliExpress

The price shown is a snapshot from the last catalog sweep, not a live figure. Links to a brand's own store are not paid placements and earn us nothing.

Specifications

Output: 2300lm
Peak intensity: 26800cd
Beam distance: 327m
Emitter: XHP70.3 HI 5000K
Colour rendering: 90 CRI
Beam type: Balanced
Cell: 21700
Runtime: 1.5 hrs (high)
Modes: 4 Stepped
Interface: Biscotti
Water/dust: IPX8
Dimensions: 5.6 x 1.4 in
Weight: 4.3 oz
Warranty: 1 Year

Manufacturer figures, measured to ANSI FL1 where the brand states it.

Features

High CRI (90+)Waterproof (IP67+)

What owners report

Convoy M21B/5 sources reviewed

Simon's 21700 workhorse and one of the best value propositions anywhere: 2,000+ lumens, a 90+ CRI emitter option and a good-looking host for around €30, which reviewers score five stars on price alone. The smooth reflector gives a sharp well-defined hotspot and real throw — the SST-40 version reaches 400 metres — and the hard-anodised aluminium body conducts heat well. Emitter choice is wide, with custom orders available.

The compromises are Convoy's usual ones. No manual or specifications are supplied. There's no onboard charging, so you need an external charger. And there's no lockout, so it can switch on in a bag and get hot enough to be a hazard — the standard practice is to unscrew the tailcap a quarter turn when storing it. Owners otherwise report zero complaints, and the mode range from moonlight to turbo covers everything.

Consistently praised

2,000+ lumens with a 90+ CRI option for around €30
Smooth reflector gives a sharp hotspot and 400 m of throw on the SST-40
Wide emitter choice, including custom orders
Hard-anodised aluminium with excellent thermal conductivity
Mode range from moonlight to turbo, with owners reporting no issues

Common complaints

No manual or published specifications supplied
No onboard charging — an external charger is required
No lockout: unscrew the tailcap for storage or it can switch on in a bag
Buying means AliExpress rather than a domestic retailer
No holster or accessories included

Questions people ask

Which emitter should I choose?: The 90+ CRI options for general use and anything you look at closely; the SST-40 for maximum throw at 400 m. Convoy's emitter menu is the main reason to buy from them.
Why do I need to unscrew the tailcap?: There's no electronic lockout, so a knock in a bag can switch the light on. Left running against fabric it gets hot enough to be a hazard. A quarter turn breaks the circuit.
Where do I buy one?: Convoy's own AliExpress storefront, which carries the full emitter and tint matrix. Expect international shipping times and no printed documentation.
How does it compare to a mainstream 21700 light?: It matches or beats them on output, beam and emitter choice for a third of the price. What you give up is onboard charging, a warranty process, and any documentation.

Sources (5)