Klarus E1 flashlight review

1000 lm output
9025 cd intensity
1 x special 18650 Li-Ion battery

The Klarus E1 flashlight was released in 2019. It uses Cree XP-L HI LED, TIR reflector and 1 x special 18650 Li-Ion battery. The powerful emitter in this flashlight provides up to 1000 lm output, 9025 cd intensity, and a beam distance of 190 m.

Excited to find out if this Klarus flashlight is worth it? Keep scrolling!

Table of Contents

  • Klarus E1 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.

Klarus E1 / E1

The E1 is a powerful and reliable flashlight. It has impressive illumination and durable construction. TIR lens plays a significant role in shaping the beam pattern of the E1 flashlight. This light has 4 modes of lighting. The E1 flashlight recalls the last used mode. You can use the strobe function as a self-defense tool.

Klarus E1 specifications

Rated 4 / 5 based on 1495 user votes.

This Klarus flashlight offers portability, versatility, and reliability.

Klarus E1 / 1

Body, materials, weight, colors

Weight50.5 g
Length105.1 mm
Body diameter22 mm
Head diameter23 mm
Materialaluminium alloy with HAIII hard-anodized finish

An extremely lightweight handheld flashlight weighs 50.5 g. Consider the length of the flashlight, it should fit comfortably in your chosen way to carry it. The aluminium body of the E1 has excellent thermal conductivity. HAIII is a specific anodizing process, it creates a thicker and harder oxide layer than regular anodizing. This flashlight comes in a sleek black color option.

Klarus E1 / 4

System, LED, lens, reflector

EmitterCree XP-L HI LED
Color temperature6500 K
Switchdual electronic rear

Cree is widely regarded as a reputable LED manufacturer. Warm, white light is generally more comfortable. The E1's TIR lens is made of a single piece of transparent material. The electronic switches may have a higher chance of standby drain. Rear switches are common on tactical flashlights.

Klarus E1 / 5

Performance, flux, intensity, throw

Flux1000 lm
Intensity9025 cd
Throw190 m
CD/LM factor9.03

The 1000 lm output of E1 provides great flexibility. The E1 flashlight has 9025 cd, it provides a much brighter and more intense beam. The throw distance is the farthest distance the flashlight can light an object. Candela per lumen (cd/lm) measures a flashlight's beam intensity.

Klarus E1 / 2

Software, user interface, modes

Modes4 modes
Mode memoryyes
Ramping modeno

A flashlight's modes are different output settings or brightness levels. The flashlight has mode memory. It remembers the mode you were using when the light was last turned off. The E1 is tactical strobe ready. The strobe light is disorienting to the person it is aimed at, this makes it hard for them to concentrate. The SOS signal is an international distress call.

Klarus E1 / 3

Features, battery, protections

Battery1 x special 18650 Li-Ion battery
Battery indicatorno
Charger portyes, on special battery
Thermal regulationyes

The E1 flashlight's power source is 1 x special 18650 Li-Ion battery. LVP (Low Voltage Protection) is designed to protect the battery. The thermal protection feature helps prevent overheating. The flashlight has an IPx8 rating. It can withstand being submerged in water beyond 1 meter for a prolonged period.

Accessories, package contents

Package contentsclip
microUSB cable
spare o-ring
special 18650 battery

The included battery is picked to match the power needs of the E1 flashlight. When you clip the flashlight to a good spot, you can angle or position it. The lanyard prevents accidental loss of the flashlight. When using spare O-rings, follow the maker's instructions.

Official sitehttps://www.klaruslight.com/

Conclusion, pros and cons

This Klarus 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
  • TIR lens
  • tactical switch
  • adequate performance
  • multiple modes
  • mode memory
  • tactical strobe
  • SOS/beacon function
  • low-voltage protection
  • thermal regulation
  • waterproof
  • battery included
  • pouch
  • clip


  • cool light
  • no battery indicator
  • no auxiliary LEDs
  • non-magnetic


Klarus E1 / E1 photo 1.
Klarus E1 / E1 photo 2.
Klarus E1 / E1 photo 3.
Klarus E1 / E1 photo 4.
Klarus E1 / E1 photo 5.
Klarus E1 / E1 photo 6.
Klarus E1 / E1


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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.