Last Updated on February 19, 2025
Choosing a quality tactical flashlight is no walk in the park. You have to scrutinize the different brands and features that different flashlights offer. The Klarus g20 LED flashlight is an excellent light with great features. If you are a newbie in the tactical flashlight, you will have to try out several flashlights before landing on the one you think is ideal for your activity. The Klarus G20, one of the brightest flashlights of 3000 lumens, has four different lighting modes, two switches, 150 hours maximum run-time, waterproof, and lots of advanced features. Read this Klarus G20 review article to know why you should think about buying this Mini USB light.
Technical Features of the Klarus G20 Flashlight
Features |
Klarus G20 |
| Maximum Brightness: | 3000 lumens |
| Minimum Brightness: | 15 Lumens |
| Maximum Run-time: | 150 hours (15 lumens) |
| Lighting Modes: | 4 (15, 160, 650, 3000 lm) |
| Minimum Run-time: | 45 minutes (3000 lumens) |
| Switch: | 2 (side switch and tail switch) |
| Beam Distance: | 180 Meters |
| Body: | Aerospace Aluminum Alloy |
| LED: | CREE XHP70 N4 |
| Battery includes: | Yes (One 26650 rechargeable battery) |
| Length: | 124 mm |
| Flashing Modes: | 2 (160, 3000 lm) |
| Waterproof standard: | IPX-8 |
| Weight: | 131 grams |
| Warranty: | Yes |
| Price: |  Check Today’s Price |
The Klarus g20 flashlight is strongly built with an aerospace aluminum body and has a hardened glass lens with an anti-abrasive coating. It uses a CREE XHP70 N4 LED with a maximum of 3000 lumens. The flashlight has the capability to reach a distance of 150 meters and comes with four different light modes. The flashlight delivers more power compared to the Klarus Mi7 Cree LED flashlight as it is powered by one 26650 Li-ion battery with a 5000 mAh capacity. Features like the smart ITS temperature control system and battery level indicator make using this flashlight fun and safe.
Summary of Contents
Klarus G20 Review (Video):
I’ve written this review on Klarus g20 dual-switch rechargeable light to help people like you avoid the stress of having to go through several lights before deciding on one. Even though Klarus is a new brand, it has already created a name for itself and is now considered to be one of the best. Another popular flashlight of this brand is 2000 lumen Klarus xt11gt and 1600 lumen Klarus xt12gt.
Benefits of using the Klarus G20 3000 lumen flashlight
- The flashlight is sturdily constructed to serve the user for over a long period of time
- It has four different lighting modes that can be utilized in different surroundings and situations
- It provides extremely bright illumination with a max lumen of 3000. The beam produces up to 150 meters.
- The flashlight is very easy to use with a dual switch and simple operation.
- The flashlight is compactly designed for easy handling of the device and storage when not in use. The lanyard and holster can be used to properly keep the flashlight.
- It is lightweight and won’t be cumbersome to attach to our belt or keep in the bag during camping or when carrying out any other outdoor activity.
- This flashlight can survive tough conditions like dust and rain as it has an O-ring that seals internal parts and waterproof ratings of IPX8.
- Features like the battery level indicator help the user to know what percentage of battery power is remaining and use the flashlight accordingly.
- It has a strobe and SOS mode. The strobe mode can be used to disorient an enemy, while the SOS mode is used when one is in danger or lost in order to alert other people.
- Klarus offers the buyer of the g20 LED flashlight a five-year warranty which is outstanding.
Cons:
- When in turbo mode, the flashlight heats up very fast. This limits a person for how long he or she can use bright light as the heat protection circuit changes the mode to another light level.
Klarus G20 Review & Product main features
- Aerospace-grade aluminum body
- Tail switch and side switch
- USB rechargeable
- Four brightness levels and two specialty light modes
- Hardened mineral glass lens with anti-reflective coating
- Built-in battery power indicator
- Has CREE XHP70 N4 LED
- Smart ITS temperature control system
- Maximum lumens of 3000
- Maximum beam distance of up to 150 meters
- Run time of 150 hours or six days
- Waterproof up to IPX8 standards
- Impact-resistant up to one meter
- It weighs 131 grams without a battery
- Holster
- Lanyard
- Spare O-ring
- Klarus 5 year warranty
Troubleshooting table for the Klarus G20 flashlight:
| Issue | Possible Cause | Solution |
|---|---|---|
| Flashlight not turning on | – Battery improperly installed – Depleted or faulty battery – Activated Lock-Out mode |
– Ensure the battery’s positive end faces the flashlight head – Replace or recharge the 26650 Li-ion battery – Exit Lock-Out mode by clicking any switch three times rapidly; the flashlight will blink twice to confirm |
| Intermittent operation or flickering light | – Loose tail or side switch – Dirty or oxidized contacts |
– Tighten both tail and side switches securely – Clean battery contacts and threads with a soft cloth |
| Difficulty cycling through modes or unresponsive switches | – Lock-Out mode activated – Faulty side or tail switch |
– Exit Lock-Out mode by clicking any switch three times rapidly – If unresponsive, perform a reset by removing the battery for a few minutes and reinstalling it |
| Battery drains quickly | – High-output mode used continuously – Parasitic drain when off – Aged or poor-quality battery |
– Use lower brightness settings for extended runtime – Remove the battery when storing the flashlight for extended periods to prevent parasitic drain – Replace the battery with a new, high-quality 26650 Li-ion battery |
Why Klarus G20 dual switch LED flashlight?
Durable aluminum construction
Why acquire a flashlight that can’t withstand hardships? The Klarus g20 LED flashlight is sturdily created to be utilized in tough conditions. It is made of an aerospace-grade aluminum body. This is a durable material. It is also lightweight and ideal for a tactical flashlight. Furthermore, the flashlight is built with a hardened mineral glass lens with an anti-reflective coating. Such features make it reliable and dependable for long-term use.
Longer run time
A rechargeable tactical flashlight is as good as it can last. If you are going to use a flashlight outdoors, it should be able to last you through the entire session. The Klarus g20 3000 lumen flashlight has a wonderful run time of 6 days or 150 hours. This means that you will continue to have excellent light for a five-day camping trip to the mountains.
Provides extremely bright light that reaches up to 150 meters
Besides offering you a longer run time, this flashlight offers extremely bright light. This ensures that your camp or dark room is well-lit. With a far-reaching beam distance of 150 meters, this flashlight can light a football pitch. The brightest level runs on 3000 lumens which is just amazing for such a small flashlight.
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Variety of brightness levels
One of the special features of the G20 LED flashlight is that it comes with various brightness levels. If you speak to any outdoor enthusiast, they will gladly tell you the importance of having a flashlight that offers different light levels. This enables the user to have control over the total battery power used. The Klarus g20 flashlight has four light modes and two specialty light modes. These include low – 15 lumens, medium – 160 lumens, high – 650 lumens, turbo – 3000 lumens, strobe – 3000 lumens, and SOS – 160 lumens.
Related comparison: What are the differences between Klarus XT12GT and XT11GT?
Built for tough environments
This LED flashlight is suitable for rough surroundings and adverse weather conditions. It can stay underwater for up to 30 minutes as long as it is between 0 to 2 meters. It also impacts resistance up to one meter. So, you can use it for survival, rescue mission, outdoor or tactical situations.
Convenient design and easy to use
The flashlight is conveniently designed for simple handling and use. It is small and lightweight. The dual switch enables the user to operate the flashlight with one hand and switch to different modes easily.
Safe to use
Unlike most flashlights on the market including Fenix, SureFire, Streamlight, etc, the Klarus g20 dual switch flashlight is very safe to use. This is because it has a smart ITS temperature control system that detects when the flashlight temperature increases and lowers it through changing the light mode. In return, this prevents the flashlight from overheating. Also, the battery level indicator allows the user to know what power percentage is remaining.
Klarus 5 year warranty
Klarus is a great brand with quality flashlights. The brand offers a five-year warranty to the purchaser of the g20 rechargeable flashlight. This is a great thing, and one can rely on the flashlight to deliver.
Comparison of the Klarus G20 and G30 flashlights:
| Specification | Klarus G20 | Klarus G30 |
|---|---|---|
| LED | Cree XHP70 N4 | Cree MT-G2 |
| Maximum Output | 3000 lumens | 2450 lumens |
| Beam Distance | 150 meters | 220 meters |
| Battery Type | 1 x 26650 Li-ion | 3 x 18650 Li-ion |
| Dimensions | Length: 124 mm; Head Diameter: 36 mm; Body Diameter: 34 mm | Length: 145 mm; Head Diameter: 64 mm; Body Diameter: 47 mm |
| Weight (without battery) | 131 g | 330 g |
| Switch Type | Dual switch (side and tail) | Side switch |
| Charging Method | Micro-USB port | External charger required |
| Waterproof Rating | IPX8 (up to 2 meters submersible) | IPX8 (up to 2 meters submersible) |
| Special Features | – Integrated USB charging – Mode memory – Lock-out mode – Intelligent Temperature Protection System (ITS) |
– High-intensity output – Longer beam throw – Designed for outdoor and tactical use |
Note: The Klarus G30 offers a longer beam distance and utilizes three 18650 batteries, providing extended runtime. In contrast, the G20 is more compact, uses a single 26650 battery, and features integrated USB charging for convenience.
For a visual comparison and more in-depth review, you might find this video helpful:
Conclusion
The Klarus G20 rechargeable flashlight is a great light for people who are looking for a small reliable flashlight. It is convenient to carry around due to its size but has a very powerful throw. It can cover up to 150 meters with a maximum of 3000 lumens. Built with aerospace-grade aluminum metal, this is a very durable LED light and can withstand impact up to 1 meter. Also, it has the ability to stay underwater to a depth of 2 meters for 30 minutes.
With such amazing features, the Klarus g20 is an ideal tactical light for campers, hikers, hunters, and patrol individuals. It always delivers in different environments and can provide light for up to 6 days. I hope this Klarus G20 review article has given a clear idea about this flashlight.
Frequently Asked Questions (FAQs)
1. How bright is the Klarus G20 flashlight?
- The Klarus G20 delivers a maximum output of 3000 lumens, making it an ultra-bright compact flashlight suitable for tactical and outdoor use.
2. What type of battery does the Klarus G20 use?
- It is powered by a 5000mAh 26650 rechargeable Li-ion battery, providing long-lasting performance.
3. Does the Klarus G20 have a built-in charging system?
- Yes, it features a micro-USB charging port, allowing users to recharge the battery without needing an external charger.
4. How many brightness modes does the Klarus G20 have?
- It has four brightness levels plus a strobe mode:
- Turbo (3000 lumens) – 45 minutes
- High (650 lumens) – 4 hours
- Medium (160 lumens) – 19 hours
- Low (15 lumens) – 150 hours
- Strobe (3000 lumens) – for self-defense/emergency situations.
5. Is the Klarus G20 waterproof and impact-resistant?
- Yes, it has an IPX8 waterproof rating, making it submersible in up to 2 meters of water, and it is impact-resistant up to 1 meter, ensuring durability.