Talk to our Experts: (860) 767-8888

FREE Shipping!

OVER $50!*

some exclusions apply

Nitecore SRT3 Defender LED Flashlight - 550 Lumens - CREE XM-L2 T6 LED - Black Finish

Nitecore SRT3 Defender LED Flashlight - 550 Lumens - CREE XM-L2 T6 LED - Black Finish
Nitecore SRT3 Defender LED Flashlight - 550 Lumens - CREE XM-L2 T6 LED - Black FinishNitecore SRT3 Defender LED Flashlight - 550 Lumens - CREE XM-L2 T6 LED - Black FinishNitecore SRT3 Defender LED Flashlight - 550 Lumens - CREE XM-L2 T6 LED - Black FinishNitecore SRT3 Defender LED Flashlight - 550 Lumens - CREE XM-L2 T6 LED - Black FinishNitecore SRT3 Defender LED Flashlight - 550 Lumens - CREE XM-L2 T6 LED - Black Finish
Free Shipping!(Details)
Product Review:
Regular Price:$108.00
Sale Price:$89.95 & Free Shipping!

Compact and Tactical

The Nitecore SRT3 Defender is an easy-to-use LED flashlight designed to be carried every day. The tactical configuration and variety of colored LED's means this light is ideal for everyone from casual users to police and military personnel in need of a back-up flashlight. The SRT3 fits easily into your pocket and can provide huge outputs in an instant. Advanced LED technology adds efficiency and longevity to the truly unique design of the Defender.

Advanced LED Technology

Nitecore started with a compact body that measures less than four inches in length, then packed a powerful XM-L2 T6 LED inside. In its highest mode, the SRT3 is capable of producing 550 lumens! The machined aluminum body is rugged enough for tough, outdoor use and features a military-spec anodizing to protect against scratches and corrosion. Precision construction and O-ring seals allow the Defender to remain resistant to water at up to two meters of submersion. The Defender's unique configuration allows it to be run off of a single CR123A battery, or one AA battery when using the included AA extender.

Revolutionary Control

The SRT3's interface is a revolutionary combination of a tail-switch interface and a Smart Selector Ring at the top of the light. The tail-switch allows easy one-handed operation, even in conjunction with a firearm or other weapon. When the switch is activated, the Defender jumps into action at whatever setting its rotator ring has been set to. To adjust the output, simply twist the selector ring and watch as the lumens grow and fade, allowing you to stop at the exact brightness level you need. Keep twisting to the right, and the light will click into its 550 lumen turbo mode, and then into its blinding strobe.

Red, White, And Blue LED's

As if all of this wasn't enough, Nitecore also included a red/blue auxiliary LED for help preserving night vision and tracking game. The red and blue settings, as well as an ultra-low mode and an SOS beacon can be accessed by twisting the rotator ring to the left, with each mode located with another click. The SRT3 Defender is a member of Nitecore's larger line of SRT flashlights. The SRT series is defined by their Smart Selector Ring, tactical tail-switch interface, and aggressive profiles. The SRT3 is available with the black finish shown in this listing as well as a grey finish available Here.

  • Utilizes the latest CREE XM-L2 T6 LED for a maximum output of up to 550 lumens
  • Second generation of 'Crystal Coating Technology' along with 'Precision Digital Optics Technology' provide extreme reflector performance
  • Equipped with unique multi-colored (red and blue) tactical/signaling lights
  • High efficiency circuit board provides up to 200 hours runtime on lowest output level
  • Infinite brightness adjustment from 0.1 to 550 lumens
  • 8 modes to choose from (Infinite Brightness 0-550 lumens, Strobe, Turbo, red light, blue light, flashing blue/red, and SOS beacon)
  • Reverse polarity protection
  • Tail stand capability
  • Stainless steel titanium-plated clip
  • Stainless steel retaining ring protects core components from damage
  • Toughened ultra-clear mineral glass with anti-reflective coating
  • Constructed from aero grade aluminum alloy
  • Waterproof in accordance with IPX-8 standards
  • Includes: holster, removable clip, AA extension tube, lanyard, spare tail cap button, and spare O-ring
  • Also available in Grey
  • LED: CREE XM-L2 T6
  • Runs on: 1x RCR123 / 1x CR123 / 1x AA (Batteries NOT included)
  • Output mode/Runtime:
      RCR123 Battery
    • High: 550lm/ .75h
    • Low: 0.1/ 150h
    • CR123 Battery
    • High: 330lm/ 1.25h
    • Low: 0.1/ 200h
    • AA Battery
    • High: 180lm/ 1h
    • Low: 0.1/ 200h
  • Peak Beam Intensity: 4500 cd
  • Dimensions:
    • Length:
      • Without Extender: 3.93" (100 mm)
      • With Extender: 4.6" (117mm)
    • Head Diameter: 1" 25.4(mm)
    • Body Diameter: 1" 25.4(mm)
  • Weight: 2.57.oz 73(g) (excluding batteries)
Runtime (Hours):-0.751.25200-
Output Modes:Beacon, SOS, Strobe, Variable Brightness, Blue, Red
Compatible Batteries:1 x AA
Batteries Included:No
Included Accessories:Extender Tube, Holster, Lanyard, Pocket Clip, Spare O-ring(s), Spare Tailcap Boot
Flashlight Usage:Every Day Carry, Tactical
Throw Distance (Max):134m
Switch Location:Variable Ring
Product Certifications:ANSI, IPX-8
Warranty:Battery Junction 30-Day Warranty, 18 Month Nitecore Warranty
Return Policy:Battery Junction Return Policy
Primary Material:Anodized Aluminum
Product Weight:2.58oz
Country of Origin:CN
Nitecore SRT3 Defender LED Flashlight - 550 Lumens - CREE XM-L2 T6 LED - Black Finish
4.5 Stars based on 7 Review(s)
Quitman, TX
5 Stars
I would recommend this item to a friend.

Great EDC
February 17, 2015
I got this 9/14 and carried it every day since then; you can hardly tell it's there. The twist function is tight, smooth, with no gritty fill at all. The blue light is usable, as in you can see the ground a few feet in front of you. The red light would only be good for seeing something at arms length, the ground is barely visible at your feet. The red and blue flashing part has no practical use that I see. The twist control let's you choose just the amount of light you want. Battery life is good and the various battery options is a big plus to me. I use an RCR123 most of the time, but having the option of using a AA is great. This light has an amazing amount of light for being as small as it is. No light will do it all but this one comes close with about 100yds of usable throw and very good spread in turbo or twist down to low to use as a nightlight.
Battery options Your choice of light out put
Not really a con but I would of rather had a brighter red light than the flashing red/blue light

Kaneohe, HI
5 Stars
I would recommend this item to a friend.

Great EDC or back up light.
January 21, 2015
I really like this light as it is compact, well built, and weather resistant. I hear from my friends and see some of the reviews that this light is a bit on the pricey side. But I believe that you get what you pay for as this little light again is quite tough. I use it as my back up light when I am in the field and it has never let me down. I have even dropped it on a jobsite, left it overnight in the rain, and found it the next afternoon half buried in mud and the with just a simple rinse this SRT3 was just fine.

Gregg G
San Antonio, Tx
5 Stars
I would recommend this item to a friend.

Impressive, but it has a few oddities.
December 12, 2014
The light output is amazing. Definitely a good pocket flashlight. Like how easy it is to change the light settings. The embedded red and blue LED is a nice twist. The odd part is the "police light" function. It has a red and blue wig wag effect. Its not very bright in that sense, so I don't know what good it would do. My only issue with the light is the tail cap button. For momentary On, you must lightly depress it for about a second or 2 before it comes on. No biggie, just if I press the tail cap, it should come on with out hesitation.
Very bright. Easily adjustable light settings.
Momentary On takes a second or two to fire up. Odd "police light" function.

San Antonio, TX
4 Stars
I would recommend this item to a friend.

Great Versatile Light
November 25, 2014
I've owned this light for about a month and I really like it. It's the first one I've owned with a selector ring; the ring was easy enough to memorize & use. I bought this light because of its ability to use AA batteries in a pinch and for the red & blue lights (I figured my kids would think it was cool). The red & blue lights turned out to be more than a gimmick - I use them when walking through a parking lot with my young children at night. I will probably buy a few of these for Christmas gifts.
Tail on/off switch Will stand up on end Size Weight Multiple light settings Accepts AA batteries if needed
Price maybe? I suppose there are cheaper lights that do many of the same things though I haven't seen any with the red & blue light options.

Halifax, Nova Scotia
4 Stars
I would recommend this item to a friend.

Involves a learning curve
July 29, 2014
I got this along with 4 Tenergy RCR123A Lithium batteries and charger. The red and blue LEDs are small but sufficient for close work. The blue LED provides enough light to mind your step in the dark or light up a dark room. The red LED is significantly weaker but sufficient for close tasks. The light output is significant with these batteries and the feel of the flashlight in hand is very nice. The control ring works flawlessly and feels robust. The general impression is one of surprising power and throw in such a small package. My light turned itself off unexpectedly, after a very brief use in turbo mode. However, this happened before I fully charged the Tenergy batteries, and I could not tell whether battery status was the main culprit. This morning I tried again with a fully charged battery and was surprised to see the light turning itself off in less than a minute. I am still trying to figure out if I am using it wrongly. On a medium high setting the light operated flawlessly for 45 minutes -without any noticeable drop in output, and got quite warm to the touch in the process. Clearly, it is not temperature control that turns it off on Turbo. I will return with an update once I figure it out.
I think it provides a fun element which is not negligible and an unparalleled array functions in its class. This will be my EDC once I figure it out properly. Exceptional delivery service from BJ staff. Thank you.
Cautious still because of beginner hiccups I am still trying to figure out.

4 Stars
I would recommend this item to a friend.

Great light and lots of features!
July 3, 2014
This is a great little light. I bought it to compare to my EDC, an Olight M10. I thought I'd like all the features of the light. I can say the control ring is awesome. The infinite brightness range is great. The light is well built and nicely finished. The only reason it doesn't get five start from me: There is a very slight perceptible delay to the light coming on when the tailcap is pressed. It makes manually strobing the light a bit tricky. This light has a place on my nightstand on a dimmer setting of brightness. I will keep the Olight M10 as my EDC.

5 Stars

Nitecore rocks again!!
July 23, 2013
I wanted an EDC/ backup pocket light that would work with almost any battery I may have avail on me without worrying about damage. The SRT3 is dead-on it works with AA-CR123-14500-RCR123s and works great!! 550lm on 14500s-RCR123 is no small feat in a compact package. I like the ability to lock the mode you want and use the rear button for fast full power. Definitely a Winner!!! Nitecore has been listening to us flashlight folks. The fact thjis light came with the AA extender tube all in one pkg was one of the reasons I went with Nitecore one stop shopping

Just click and drag to rotate view!
Special Offer
FREE Keylight
All Orders
$20.00 or More!
Bright Buys
Titanium Innovations CR123A 3V Lithium Battery - 1400mah - 12 Pack
Regular price: $29.95
Sale price: $11.76
(93 Reviews)
Nitecore SRT6 LED Flashlight - 930 Lumens - CREE XM-L2 LED - Uses 1x18650 or 2xCr123 - Grey Finish
FREE Shipping!
Regular price: $114.00
Sale price: $94.95
(5 Reviews)
Nitecore Tube Rechargeable LED Keylight - 45 Lumens - USB Rechargeable
Regular price: $12.00
Sale price: $9.90
(77 Reviews)
Niteye MSA10  Compact LED Flashlight - 160 Lumens - Uses 1 x AA
Regular price: $87.60
Sale price: $54.75
(8 Reviews)