Nitecore SRT6i Review (2024 Upd.) Great Tactical Flashlight

Last Updated on October, 2024

Nitecore always comes up with powerful and highly user-friendly flashlights. But some of them are genuinely legendary in terms of every aspect.

And it’s very understandable that everyone is trying to see if the Nitecore SRT6i belongs to the legendary category.

I had the same question, and I believe you have it, too — if that’s the case, you’re in the right place. 

This review has EVERYTHING you need to know about the flashlight, with some secrets that nobody else knows. That’s because I bought a unit and tested each feature patiently and carefully.

So, is the Nitecore SRT6i worth the investment? Let’s start analyzing the question by looking at its features.

Nitecore SRT6i Specs Table

Flashlight Type	Tactical & EDC light
Dimensions	Length: 163 mm / 6.42’’ Head Size: 40 mm / 1.57’’ Weight 167 g / 5.89’’ (without battery)
EDC	High-Performance Neutral White LED
Max brightness: Turbo mode	2100 lumens — 30 mins
High mode	300 lumens — 7h 30 mins
Mid mode	30 lumens — 70h
Strobe mode	2100 lumens
Max beam throw	510m
Max runtime	70h / 2.91 days
No. of modes	4
Rechargability type	USB-C
Average charging time	Approximately 4 hours and 40 minutes
Waterproof rating	IP68
Impact resistance	2m

What’s in the Box of Nitecore SRT6i?

>> Click here to checkout yourself <<

1. SRT6i x 1 
2. NL2150HPi battery x 1
3. CR123 battery magazine x 1 
4. Holster x 1 
5. Spare O-ring x 1
6. Clip x 1 
7. USB-C charging cable x 1
8. Lanyard x 1
9. User Manual x 1

Features of the Nitecore SRT6i

Build Quality and Design

The unique sectionalized knurling pattern, exclusive to the Nitecore brand, provides even greater grip and control, even in wet or slippery conditions.

Here are the dimensions of the Nitecore SRT6i:

• Length: 163 mm / 6.42’’
• Head Size: 40 mm / 1.57’’
• Weight: 167 g / 5.89’’ (without battery)

But the design of the Nitecore SRT6i isn’t just about comfort and grip – it’s also about functionality. The U-shaped tail cap is a key feature of this flashlight, offering four distinct benefits.

Firstly, if necessary, it allows you to use the flashlight as a weapon by using the tail cap to strike an opponent. 

Secondly, it helps prevent accidental activation of the flashlight, so you don’t waste precious battery life. 

Thirdly, it lets you stand the flashlight up on its tail, so you can use it hands-free. And fourthly, it is compatible with a lanyard so that you can easily carry the flashlight.

The all-new detachable clip is another innovative feature of the Nitecore SRT6i. This clip is fixed by the tail cap and the slot for limiting displacement, which ensures a firm mounting and avoids any annoying shaking or displacement. 

You can attach the flashlight to your gear or clothing and be confident that it will stay securely in place until you need it.

All these features SCREAM how superior the design of this flashlight is.

User Interface

The Nitecore SRT6i features a tactical dual tail switch that puts the power and strobe button at your fingertips. 

But that’s not all – the SRT6i also boasts a 4th generation smart selector ring, the world’s first of its kind. 

With this unique feature, you can easily control the Strobe mode, Turbo level, lockout mode, and all brightness levels, all with one hand. The smart selector ring is designed with the user in mind. 

Clearly indicated modes on the ring eliminate any guesswork, so you can quickly and easily select the mode you need, whether it’s for tactical use, emergency situations, or everyday use.

How does the interface work? Let’s check that out.

As I’m about to explain, there are 4 modes; mid, high, turbo, and strobe.

When the flashlight is OFF:

• Half-turn the ring switch for the momentary selected mode
• A single click would cycle the modes
• Half pressing the tail switch will engage momentary turbo
• Full pressing the tail switch will engage the momentary strobe 

When the flashlight is ON:

• Single-clicking the ring switch will cycle through each mode as marked on the ring
• Single clicking the tail switch will turn it off
• Half-press the StrobeReady™ switch for momentary turbo
• Full pressing the tail strobe switch will turn on the turbo

In addition, the mode memory will be there, so the mode will stay unchanged as long as the ring’s position is unchanged.

With the power indicator, you’ll always know how much battery life you have left, giving you the peace of mind you need when relying on a flashlight. It’s on the side and will step down until it turns off at 2.9V.

Needless to say, it’s an impressive user interface the Nitecore SRT6i boasts.

Brightness Modes and Beam Throw 

High mode, on the other hand, exceeded the claimed 300-lumen output and was constantly in the 330-lumen range. Results above what’s claimed are typical with Nitecore flashlights and are always good to see. 

The same can be said for beam throw; on paper, it’s 175 meters. Measured 237 meters; that is a significant jump. Candela numbers are what surprised me the most; they’re so much higher than what’s claimed. I went into the 14000cd range while the claimed number is 7700cd. That is twice the jump. 

High mode sets the perfect middle ground for typical use; you can rely on it for most of your activities. 

For those who need even more brightness, the turbo mode is sure to impress. But the SRT6i wasn’t able to reach nor exceed the claimed specs this time. Super rare, that. 

Claimed lumen output is 2,100; my reading was 1810 lumens, which is quite a bit low. However, it’s maintained in that range for a good 10 minutes before coming down to 690 lumens, as expected. Not too shabby, considering it’s maintaining closer to what’s claimed for 10 mins.

The story is different in the beam range side of things; it very well exceeds what’s claimed this time; my unit lit for 637 meters, which is much higher than the claimed 510 meters. That can easily illuminate even the darkest corners. 

65,200cd is the intensity that’s specified on turbo; However, would you believe if I said I got 99670cd, I double-checked to make sure whether my reading was correct, and yes, they were. You can rest assured that you’ll be able to see everything clearly with that amount of intensity.

But that’s not all – the SRT6i also features a strobe mode that instantly lets you access 2,100 lumens. 

This is possible thanks to the 2nd generation StrobeReady™ mode, which enables a frequency range of 16Hz-20Hz. This helps to disorient attackers and give you the upper hand in dangerous situations.

Its advanced optical system sets the Nitecore SRT6i apart from other flashlights. The crystal coating and “Precision Digital Optics Technology” (PDOT) work together to create a beam up to 125% brighter than other flashlights. 

Battery Specs and Rechargeability 

Let’s look at how each mode runs: 

Mode	Claimed Runtime	Measured
Mid	70h	–
High	7h 30min	8h 03min
Turbo	30	1h 34min

As you can see, mode High and Turbo exceed what’s actually claimed, and that’s good; who’s going to say no to higher runtimes?

That said, you should know that the 1h 34min runtime on the turbo isn’t on the max lumen output; as mentioned already, it comes down to 690 lumens after 10 mins, so from there, you can expect it to go a little higher but most often than not, lower towards the end. 

Mid is the mode that exceeded my expectation; over 300 lumens for 8 hours is really good. 

Strike Bezel

Designed with high-hardness silicon nitride ceramics, the strike bezel of the Nitecore SRT6i is both durable and efficient. A strike bezel is an invaluable tool when self-defense or breaking glass is necessary. 

The smooth surface of the bezel prevents accidental scratches on clothes or backpacks, ensuring that the flashlight remains in top condition. 

The strike bezel is also designed to be quick and easy to use, making it ideal for emergencies. With this feature, you can feel confident that you are well-equipped to handle unexpected challenges.

Durability Against Dust and Impact 

Additionally, the flashlight is designed to withstand impact, with a rating of 2m, making it ideal for use in rugged environments. 

With this level of durability, you can be confident that the SRT6i will hold up even in the most challenging conditions.

Advanced Temperature Regulation (ATR)

ATR, or the Advanced Temperature Regulation, is one of the unique features that sets Nitecore flashlights apart — after all, it’s patented.

It regulates the output of the flashlight according to the ambient environmental conditions. Think of it as a safety clip; whether you like it or not, the device protects itself.

The lifespan of the Nitecore SRT6i will skyrocket since that interior temperature will be perfectly sustained. This is regardless if it was the freezing winter or the sweaty summer.

Sometimes, the working conditions can also be dramatic, especially in terms of temperature. For all these occasions, the Nitecore SRT6i will definitely meet and exceed expectations.

Anti-Impact Reverse Polarity Protection Mechanism

There’s a good chance that YOU want this flashlight for tactical purposes. If that’s the case, you know how important anti-impact reverse polarity protection is.

If not for this, the battery and the flashlight will be damaged faster than you’d expect. That’s why this flashlight makes the perfect companion for anyone in shooting sports.

Even if you’re not, having that extra protection delivers peace of mind.

Customizable With Tactical Accessories

Branded flashlights like Nitecore’s are of high caliber in terms of performance. So, it’s natural for users to expect more from the flashlight.

That’s why there’s a separate section by Nitecore for the attachables.

You’d be happy to hear that the Nitecore is compatible with many Nitecore accessories like the NTW40 traffic wand, NDF40 diffuser, gun mounts such as the GM02MH, GM03, and GM04, the signal light with code name TSL 10i.

My personal favorite is the RSW2i USB-C remote switch; I’ll explain my experience with it when I’m explaining my experience with the flashlight.

So, the bottom line is that the Nitecore SRT6i is LOADED with useful features. The harmonious combination of these features makes it work like magic.

What Customers Say About Nitecore SRT6i?

Let me show a glimpse of what SRT6i users have to say about the flashlight.

Wade is a seasoned Nitecore flashlight owner (there are so many like him), and he finds the flashlight worth the price. If he finds it satisfactory, I guarantee that you’ll love it.

There’s ALWAYS going to be that general customer who is extremely impressed and praises Nitecore; this is a classic example.

Martinez is short and sweet about his satisfaction. After all, it draws a clear picture.

My Experience With the Nitecore SRT6i

I always test flashlights I review first hand, and let me tell you my experience with the SRT6i.

As I mentioned at the start, the feeling of holding the Nitecore SRT6i is unique; you feel how firmly the knurling pattern ensures the perfect grip. It feels very comfortable to hold it, thanks to the bottom-slim shape of the flashlight.

Thanks to the exceptional finish, you can observe how impressive the build quality is. I’m sure this is because of the aerospace-grade aluminum and HA III military-grade hard anodized finish.

The U-shaped tail cap is a game-changer by design. While you can make it upright, the chances for accidental activation are borderline zero. You can easily attach it with a lanyard, which is definitely strong enough — but I couldn’t check its strength against an aggressor. ????

The flashlight effortlessly enables one-handed operation whether you use the strobe or the selector ring. The ring is clearly marked, so it’s easier to know which mode you’re on. But most importantly, it doesn’t make your fingers experience fatigue while using it.

The brightness is impeccable! The beam pattern and the clearness are the foundation of that superiority. I’m pretty sure that all light modes have above-standard CRI levels to reveal colors more accurately.

The strobe mode felt impressive, especially due to the fluctuating frequency that creates an unsettling light — undoubtedly amazing for self-defense.’

Additionally, there’s a touch strike bezel, and I tried it on a glass safely; I didn’t want to break it, but I wanted to sense the feeling of the impact. 

So, Nitecore continues to ensure quality in terms of that.

The runtimes add up, too; the claimed 70 hours seem to live up to it.

I dipped it in water, held it under the shower, and even poured water on it repeatedly — even after everything, the flashlight was COMPLETELY normal.

Then I didn’t want to drop it too! It’s supposed to have a 2m impact resistance, and I’ll take Nitecore’s word for that.

Although I didn’t check all the optional accessories, I did try the remote RSW2i USB-C remote switch. This reduced the use of my hand, increasing the convenience of use. 

But I did notice how the clip doesn’t always attach properly, just once or twice. On the flip side, I felt like Nitecore COULD have tried to lower the charging time.

So, all things considered, the Nitecore SRT6i impressed me tremendously. Even the best flashlights have downsides, and it’s very normal.

Price, Warranty, and Refund Policy of Nitecore SRT6i

Nitecore is one of the TOP flashlight brands in the world. They bring the highest quality, and these flashlights sometimes become family legacies thanks to their durability.

So, it’s a bargain to get a powerful compact beast like this for just $109.95.

As for all the best-performing flashlights, Nitecore gives the SR6i a limited lifetime warranty. This basically means that you can repair your flashlight countless times for FREE. You only have to pay if the flashlight needs replacement parts.

Believe me when I say that not all leading flashlight brands give you this benefit. 

But since Nitecore is so popular, and so is the SRT6i, there are SO many third-party sellers. You might even find one for $99, which is quite tempting. My advice is NOT to buy from ANY third-party sellers. 

You also get 15 days return duration just in case a reason comes up for you not to accept the product. 

So, where should you buy it from?

Where to Buy the Nitecore SRT6i From?

You should buy it from the official website; here’s the link from which I got mine. They ship within 24 hours, and that speeds up the delivery process.

Buying from the official website is safe due to 2 reasons primarily.

1. You can receive the absolute original products with no duplicates. Nitecore doesn’t want to tarnish its brand value like that.
2. When you get a quality unit from a 3rd party seller, Nitecore answers to the seller, not you. Imagine the hassle when claiming a warranty and such situations.

Pros and Cons of the Nitecore SRT6i

Nitecore brand’s other flashlight reviews:

• Nitecore TM12K
• Nitecore NU43

In Conclusion 

Nitecore has ALWAYS been a reliable flashlight brand, and the only question was whether the Nitecore SRT6i met AND exceeded expectations. 

The design, the user interface, durability aspects, brightness, and everything in between bring SO much value to your investment. On top of all these impressive features, there’s a limited lifetime warranty along with a 15 days return policy as well.

It’s a 100% risk-free investment that meets and exceeds your expectations. 

So, buying an SRT6i is an investment, probably for a lifetime. It all depends on buying it from the official website; do that right, and you’ll have the best flashlight for a long time.

I hope this review was helpful, and have a great morning, afternoon, or night!

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