FlashlightChart.com
Haikelite

Haikelite HK04 SST40 flashlight review

4 x Luminus SST40 LEDs
9000 lm output
180625 cd intensity
3 x 18650 Li-Ion batteries

The Haikelite HK04 SST40 flashlight was released in 2019. It uses 4 x Luminus SST40 LEDs, SMO reflector and 3 x 18650 Li-Ion batteries. The powerful emitter in this flashlight provides up to 9000 lm output, 180625 cd intensity, and a beam distance of 850 m.

Want to know if the Haikelite made a really good flashlight? You'll find out by the end of our article!

Table of Contents

  • Haikelite HK04 SST40 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 Haikelite HK04 SST40, then tell us.

Haikelite HK04 SST40 / HK04SST40

The HK04 SST40 flashlight is an essential tools for emergency preparedness. In disasters or blackouts, when electricity is unavailable, a flashlight is crucial. It helps you navigate dark areas. The memory function is a nice feature, the light will remember the last used mode. It has a strobe function, which is one of the most effective self defense tools available. This USB rechargeable flashlight eliminates the need for disposable batteries. It offers a cheaper and more eco-friendly solution.

Haikelite HK04 SST40 specifications

BrandHaikelite
NameHK04 SST40
TypeHK04SST40
Rating
Rated 3 / 5 based on 1445 user votes.
Launch2019
Formflashlight

Flashlights are unlike ambient or overhead lights. They let you aim the light where you need it.

Haikelite HK04 SST40 / 1

Body, materials, weight, colors

Weight370 g
Length140 mm
Body diameter46 mm
Head diameter56 mm
Materialaluminium alloy with HAIII hard-anodized finish
Colorsblack
brown

This 370 g flashlight might feel relatively heavy if held in hand. The length of a flashlight can affect how it feels in your hand and how you can grip and maneuver it. The aluminium body of the HK04 SST40 has excellent thermal conductivity. This means it can effectively dissipate heat generated by the flashlight's components. The HAIII process makes a hard and wear-resistant surface on the aluminum. This makes it more resistant to scratches, abrasions, and impacts. The HK04 SST40 flashlight is available in assorted colors: black, brown.

Haikelite HK04 SST40 / 2

System, LED, lens, reflector

Emitter4 x Luminus SST40 LEDs
Color temperature5000 K, 6500 K
ReflectorSMO
Lenstoughtened AR coated glass
Switchelectronic side

Luminus is a US-based LED manufacturer. In the lighting industry, it has gained recognition as reputable. Color temperature is a characteristic of light. It is used to quantify the color appearance of light sources. The HK04 SST40 has a smooth reflector. The right reflector focuses light well. It gives you a better hotspot, and it throws better. The AR coating reduces the loss of light due to reflections, allowing more light to pass through the lens. The flashlight has electronic switches. They have many benefits and extra features compared to mechanical switches.

Haikelite HK04 SST40 / 3

Performance, flux, intensity, throw

Flux9000 lm
Intensity180625 cd
Throw850 m
CD/LM factor20.07

The HK04 SST40 flashlight has 9000 lm. It will provide an exceptionally bright and powerful beam of light. 180625 cd represents an extremely high level of brightness for a flashlight. The throw is the distance in meters at which the flashlight produces a light intensity of 0.25 lux. The cd/lm factor is the candela-to-lumen ratio. It shows how concentrated a light source's output is.

Software, user interface, modes

FirmwareAnduril
Mode memoryyes
Ramping modeyes
Strobeyes
SOS/Beaconyes

The Anduril firmware is an open-source firmware developed for flashlights. The design offers advanced control and customization options. 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 ramping mode has an advantage. It offers precise control over the light amount emitted by the flashlight. You can use Strobe for signaling purposes. It can also be used for self-defense or to attract attention in emergency situations. The HK04 SST40's SOS mode produces a specific sequence of long and short flashes. It signals distress or emergency.

Features, battery, protections

Battery3 x 18650 Li-Ion batteries
Battery indicatoryes
Charger portUSB Type-C
LVPyes
Thermal regulationyes
ProtectionIPx7
AUX LEDsno
Magneticno

The Haikelite HK04 SST40 flashlight is powered by 3 x 18650 Li-Ion batteries. 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 flashlight detects when the battery's voltage has dropped to a certain level. Then, it reduces or cuts off the power.

The built-in thermal control adjusts brightness output to prevent overheating. The "7" in the IPx7 rating shows that the flashlight can survive being submerged in water. It can withstand a certain depth for a limited time without getting damaged.

Accessories, package contents

Package contents2 x spare o-rings
USB Type-C cable
lanyard

Securing the flashlight with a lanyard frees up your hands for other tasks. It keeps the flashlight within reach. Replacing worn or damaged O-rings helps a lot. It keeps up the flashlight's durability and performance.

According to the ANSI/NEMA FL1 Standard, we measure the performance of the HK04 SST40 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 Haikelite 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

  • aluminium body
  • body color options
  • warm light
  • AR coated lens
  • side switch
  • strong flux
  • super bright
  • Anduril firmware
  • mode memory
  • ramping mode
  • tactical strobe
  • SOS/beacon function
  • battery indicator
  • USB charger
  • low-voltage protection
  • thermal regulation
  • waterproof

Cons

  • no auxiliary LEDs
  • non-magnetic

Photos

Haikelite HK04 SST40 / HK04SST40 photo 1.
Haikelite HK04 SST40 / HK04SST40 photo 2.
Haikelite HK04 SST40 / HK04SST40 photo 3.
Haikelite HK04 SST40 / HK04SST40 photo 4.
Haikelite HK04 SST40 / HK04SST40

If there’s information about the Haikelite HK04 SST40 that you would like to see on this site, then write to us.

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.
FlashlightChart.com / Flashlights / Haikelite / Haikelite HK04 SST40 (2019)