Klarus E1 1000lm In-depth review, Pros and Cons

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

The Klarus E1 (E1) 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.

The E1 is an impressive flashlight that offers both power and reliability. Its robust build and outstanding illumination make it a versatile lighting instrument. 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. So, you don't need to access higher brightness levels unless you need to. You can use the strobe function as a self-defense tool. It provides a non-lethal way to deter or disorient attackers.

Klarus E1 (E1) pictures

Klarus E1 / E1 photo 1.
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Klarus E1 / E1

We base the specifications below on the official data published by the manufacturer, while also considering user reviews. If you found an error or something lacking in the specifications for the Klarus E1, then tell us.

Klarus E1 (E1) specifications

Rated 4 / 5 based on 1379 user votes.

Flashlights let you navigate in the dark. They help you find supplies and signal for help. They also provide comfort and security in tough times.


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. A smaller flashlight is easier to carry in a pocket, bag, or pouch. This makes it more convenient for everyday use or when you're on the go. Aluminium is a lightweight material, which is beneficial for E1 flashlight. 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.


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. It's also less harsh on the eyes than cool, white light. The E1's TIR lens is made of a single piece of transparent material. This material is typically acrylic or polycarbonate. The electronic switches may have a higher chance of standby drain. Rear switches are common on tactical flashlights. Law enforcement, military, and self-defense personnel use them.


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

The 1000 lm output of E1 provides great flexibility. You can adjust the brightness to fit different needs. 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. It compares this to its total luminous flux or output.


Modes4 modes
Mode memoryyes
Ramping modeno

A flashlight's modes are different output settings or brightness levels. They can be chosen to meet different needs and preferences. The flashlight has mode memory. It remembers the mode you were using when the light was last turned off. It stays in that mode when you turn it on again. 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 flashes Morse code so you can signal for help when needed.


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. It provides reliable, long-lasting energy for top performance. LVP (Low Voltage Protection) is designed to protect the battery. It stops over-discharging, which can reduce battery life or cause permanent damage. The thermal protection feature helps prevent overheating. Overheating can harm the flashlight's performance, battery, and safety. The flashlight has an IPx8 rating. It can withstand being submerged in water beyond 1 meter for a prolonged period. The manufacturer specifies this.


Package contentsclip
microUSB cable
spare o-ring
special 18650 battery

The included battery is picked to match the power needs of the E1 flashlight. This ensures reliable and efficient operation. When you clip the flashlight to a good spot, you can angle or position it. This will give you hands-free light. The lanyard prevents accidental loss of the flashlight. When using spare O-rings, follow the maker's instructions. Use their guidelines for proper installation.

According to the ANSI/NEMA FL1 Standard, we measure the performance of the Klarus E1 flashlight 30 seconds after switching on the light. The ANSI/NEMA FL1 2009 Standard is a set of flashlight performance guidelines.

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