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Klarus XT21X flashlight review

Cree XHP70.2 LED
4000 lm output
24964 cd intensity
1 x 21700 Li-Ion battery

The Klarus XT21X flashlight was released in 2019. It uses Cree XHP70.2 LED, SMO reflector and 1 x 21700 Li-Ion battery. The powerful emitter in this flashlight provides up to 4000 lm output, 24964 cd intensity, and a beam distance of 316 m.

Interested to see if this Klarus flashlight is a hit? Find out soon!

Table of Contents

  • Klarus XT21X specifications
    • Body, materials, weight, colors
    • System, LED, lens, reflector
    • Performance, flux, intensity, throw
    • Software, user interface, modes
    • Features, battery, protections
    • Accessories, package contents
  • Conclusion, pros and cons
  • Photos

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. If you found an error or something lacking in the specifications for the Klarus XT21X, then tell us.

Klarus XT21X / XT21X

The XT21X is an impressive flashlight that offers both power and reliability. Its robust build and outstanding illumination make it a versatile lighting instrument. This light has 5 modes of lighting. The XT21X 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. This USB rechargeable flashlight is small and light. It is easy to carry.

Klarus XT21X specifications

BrandKlarus
NameXT21X
TypeXT21X
Rating
Rated 3 / 5 based on 1496 user votes.
Launch2019
Formflashlight

A flashlight provides reassurance and confidence. It is helpful in unfamiliar or dangerous places.

Klarus XT21X / 4

Body, materials, weight, colors

Weight158 g
Length161 mm
Body diameter27.5 mm
Head diameter41 mm
Materialaluminium alloy with HAIII hard-anodized finish
Colorsblack

The XT21X is generally comfortable to hold for a long time. It is also easy to carry in pockets or bags. The length of a flashlight can affect how it feels in your hand and how you can grip and maneuver it. The aluminum bodies can be anodized. This adds a protective layer and a wide range of color options for flashlight bodies. HAIII is a specific anodizing process. It creates a thicker and harder oxide layer than regular anodizing. This flashlight features a captivating black color.

Klarus XT21X / 2

System, LED, lens, reflector

EmitterCree XHP70.2 LED
Color temperature6500 K
ReflectorSMO
Lenstoughtened AR coated glass
Switchelectronic side, mechanical rear, mode pedal 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. If you need long-range light, get a flashlight with a smooth reflector. It will have more throw distance. The AR coating on the lens maximizes light transmission. This makes the flashlight more effective in darker environments. The XT21X uses multiple switches. The switches' placement and design determine this. They allow for one-handed operation.

The electronic switches may have a higher chance of standby drain. Mechanical switches often offer tactile feedback. Users can feel a distinct click or resistance when they press the switch. Rear switches are common on tactical flashlights. Law enforcement, military, and self-defense personnel use them.

Klarus XT21X / 1

Performance, flux, intensity, throw

Flux4000 lm
Intensity24964 cd
Throw316 m
CD/LM factor6.24

The XT21X flashlight has 4000 lm. It will provide an exceptionally bright and powerful beam of light. The XT21X flashlight has 24964 cd. It can light objects at greater distances. 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.

Klarus XT21X / 3

Software, user interface, modes

Modes5 modes
Mode memoryyes
Ramping modeno
Strobeyes
SOS/Beaconyes

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. You can use Strobe for signaling purposes. It can also be used for self-defense or to attract attention in emergency situations. The XT21X's SOS mode produces a specific sequence of long and short flashes. It signals distress or emergency.

Features, battery, protections

Battery1 x 21700 Li-Ion battery
Battery indicatoryes
Charger portmicroUSB
LVPyes
Thermal regulationyes
ProtectionIPx8
AUX LEDsno
Magneticno

The XT21X flashlight's power source is 1 x 21700 Li-Ion battery. It provides reliable, long-lasting energy for top performance. The battery indicator helps users check the battery status. It also estimates how much runtime they have left before recharging the battery. The built-in charger allows for convenient and versatile charging. You can use various USB power sources to recharge the battery. The Low Voltage Protection helps save the battery's capacity. It stops it from reaching a critically low voltage.

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.

Accessories, package contents

Package contents21700 battery
lanyard
microUSB cable
nylon holster
spare o-ring

The included battery is picked to match the power needs of the XT21X flashlight. This ensures reliable and efficient operation. The flashlight package is thoughtful, it has a holster. It offers you a practical and secure way to store your flashlight. Securing the flashlight with a lanyard frees up your hands for other tasks. It keeps the flashlight within reach. 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 XT21X flashlight 30 seconds after switching on the light. The ANSI/NEMA FL1 2009 Standard is a set of flashlight performance guidelines.

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.

Pros

  • lightweight
  • aluminium body
  • AR coated lens
  • side switch
  • tactical switch
  • strong flux
  • super bright
  • multiple modes
  • mode memory
  • tactical strobe
  • SOS/beacon function
  • battery indicator
  • USB charger
  • low-voltage protection
  • thermal regulation
  • waterproof
  • battery included
  • protective holster

Cons

  • cool light
  • no auxiliary LEDs
  • non-magnetic

Photos

Klarus XT21X / XT21X photo 1.
Klarus XT21X / XT21X photo 2.
Klarus XT21X / XT21X photo 3.
Klarus XT21X / XT21X photo 4.
Klarus XT21X / XT21X photo 5.
Klarus XT21X / XT21X

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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.
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