Acebeam M20 flashlight review

Cree XP-G3 LED
150 lm output
628 cd intensity
1 x AAA battery

The Acebeam M20 flashlight was released in 2016. It uses Cree XP-G3 LED, OP reflector and 1 x AAA battery. The powerful emitter in this flashlight provides up to 150 lm output, 628 cd intensity, and a beam distance of 50 m.

Curious if this Acebeam flashlight is great? Keep reading to find out!

Table of Contents

  • Acebeam M20 specifications
    • Body, materials, weight, colors
    • System, LED, lens, reflector
    • Performance, flux, intensity, throw
    • Software, user interface, modes
    • Features, battery, protections
    • Accessories, package contents
    • Links
  • Conclusion, pros and cons
  • Photos
  • Comparisons

The content of this article reflects our own experiences and viewpoints. We aim to offer insights on a topic, and we hope others find it helpful and motivating. Additionally, we make every effort to provide accurate and comprehensive coverage.

Acebeam M20 / M20

The M20 flashlight offers a versatile lighting solution. This light has 3 modes of lighting. This flashlight does not have memory function.

Acebeam M20 specifications

Rated 4 / 5 based on 1521 user votes.

A flashlight provides reassurance and confidence.

Acebeam M20 / 1

Body, materials, weight, colors

Weight10 g
Length68 mm
Head diameter14 mm
Materialaluminium alloy with HAIII hard-anodized finish
desert tan

The flashlight is lightweight and easy to handle for most people. A smaller flashlight is easier to carry in a pocket, bag, or pouch. The aluminium body of the M20 has excellent thermal conductivity. Flashlight makers widely use HAIII coating. Factors can influence the color choice of the flashlight body.

Acebeam M20 / 2

System, LED, lens, reflector

EmitterCree XP-G3 LED
Color temperature6500 K
Lenstoughtened AR coated glass

Cree is widely regarded as a reputable LED manufacturer. Warm, white light is generally more comfortable. The M20 has an orange peel (OP) textured reflector. Orange peel reflectors have smoother beams. The AR coating is thin and applied to the lens surface.

Performance, flux, intensity, throw

Flux150 lm
Intensity628 cd
Throw50 m
CD/LM factor4.19

150 lm can provide a decent amount of brightness and be suitable for many everyday tasks. 628 cd can make things quite bright. It's enough for many everyday tasks. The throw is the distance in meters at which the flashlight produces a light intensity of 0.25 lux. Candela per lumen (cd/lm) measures a flashlight's beam intensity.

Software, user interface, modes

Modes3 modes
Mode memoryno
Ramping modeno

A flashlight's modes are different output settings or brightness levels.

Features, battery, protections

Battery1 x AAA battery
Battery indicatorno
Charger portno
Thermal regulationno

The M20 flashlight's power source is 1 x AAA battery. The M20 cannot charge batteries. You may need an external charger to keep your battery going. Use a protected battery, because this flashlight lacks low voltage protection (LVP). This light does not have temperature control feature. The "8" in the IPx8 rating means the highest level of protection.

Accessories, package contents

Package contentskey ring
spare o-ring

When using spare O-rings, follow the maker's instructions.

Official sitehttps://www.acebeam.com/

Conclusion, pros and cons

This Acebeam flashlight, like any other, has its strengths and weaknesses. Let's take a close look at both sides to understand this flashlight better. I share my thoughts on its standout features and the parts that might need improvement. Keep in mind, these are just my opinions, and you might have a different perspective.


  • lightweight
  • aluminium body
  • body color options
  • OP reflector
  • AR coated lens
  • multiple modes
  • waterproof


  • cool light
  • moderated performance
  • low intensity
  • no mode memory
  • no battery indicator
  • no built-in charger
  • no LVP
  • no thermal regulation
  • no auxiliary LEDs
  • non-magnetic


Acebeam M20 / M20 photo 1.
Acebeam M20 / M20 photo 2.
Acebeam M20 / M20 photo 3.
Acebeam M20 / M20


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Updated: April 23, 2024

David Hagon
I love bushcraft and flashlights. I find joy in mastering wilderness survival skills and exploring the realm of illuminating gadgets. Bushcraft isn't just fun, it's a learning journey. I form a strong bond with nature. It's more than a hobby, it enriches me in practical and spiritual ways.