Fenix TK51 LED Flashlight

Fenix TK51 LED Flashlight

1800 lumen searchlight – long beam range 1,394 feet – powered by 3 x 18650 li-ion batteries (batteries sold separately) – two individually controlled spot and flood LEDs allows for adjustable focus beam…..$95.97

  • Output: 1800-10 lumens
  • Battery Type: 3 x 18650 lithium-ion rechargeable
  • Run Time: 1.75-210 hours
  • Focus Type: Individually controlled spot & flood beams
  • Weight w/Batts: 20.8 oz
  • Dimensions: 7.4" long x 2.8" head dia x 1.9" body dia

$159.95 $95.97

only 2 available


Fenix TK51 is on sale while quantities last. Price marked is an additional 40% off.

The Fenix TK51 LED flashlight delivers the power of a searchlight in a handheld package. This incredibly bright flashlight features two individually controlled spot and flood Cree XM-L2 U2 LEDs. This lets you personalize the beam pattern of your TK51. The Fenix TK51 flashlight produces up to 1800 lumens in high, making it one of the brightest handheld flashlights on the market today. With a beam range of up to 1,394 feet, the Fenix TK51 can act as a true searchlight.

What’s included in the box: Fenix TK51 flashlight, wrist lanyard, 2 spare o-rings, plastic carrying case (batteries not included)

Features of Fenix TK51 LED flashlight:
• two Cree brand XM-L2 U2 LEDs with lifespan of up to 50,000 hours
• separate spot and flood LEDs with combined max output of 1800 lumens
• SPOT mode: four brightness levels plus strobe
     turbo – 900 lumens*, 3.5 hour run time, beam distance of 425m (1,394 ft)
     high – 400 lumens, 9 hour run time
     medium – 150 lumens, 27 hour run time
     low – 10 lumens, 420 hour run time
     strobe – 1800 lumens
• FLOOD mode: four brightness levels
     turbo – 900 lumens, 3.5 hour run time
     high – 400 lumens, 9 hour run time
     medium – 150 lumens, 27 hour run time
     low – 10 lumens, 420 hour run time
• 3 pushbutton switch system
     left switch controls the flood LED
     right switch controls the spot LED
     bottom power switch turns both spot and floods LEDs on at the same time
• press and hold either top switch for 1 second to activate strobe mode
• press and release either top switch to advance to the next brightness level
     always turns on in the last selected brightness level
***note – each switch controls a separate LED. For both LEDs to be on, follow this procedure for each switch.
• waterproof to IPX-8 standard – waterproof in up to 2 meters of water for 30 minutes
• powered by 3 x 18650 lithium-ion rechargeable batteries or 6 x CR123A lithium batteries (batteries not included)
• momentary turbo mode for max brightness
     press and hold power button for 1 second. When button is released
     brightness will drop to the previous brightness level (including off)
• over-heating protection – when TK51 accumulates too much heat in the turbo mode, brightness will automatically drop to next highest output
• intelligent memory – TK51 will always turn on in the last brightness setting used
• high quality aluminum construction with Type III hard anodized finish
• ultra-clear glass lens with anti-reflective coating
• digitally regulated output provides more consistent brightness over the life of the battery
• low voltage indicator – TK51 will blink 3 times every 5 minutes when batteries need to be replaced
• reverse polarity protected
• Fenix TK51 measures 7.4″ long x 2.8″ head diameter x 1.9″ body diameter
• weighs 20.8 oz with batteries
• includes TK51 flashlight, wrist lanyard, 2 spare o-rings, and plastic carrying case (batteries not included)
• made in China
• limited 1 year warranty through BrightGuy
     Note: damage due to battery leakage is not covered under warranty

*combined SPOT and FLOOD output lumen ratings and run times will differ. Refer to instruction manual for details.

Battery warnings:
* Do not mix batteries of different brand, size, or capacity. Doing so can damage the flashlight or the batteries being used.

18650 li-ion batteries are powerful cells that must be treated with caution and handled with care. Quality batteries with circuit protection will reduce the potential for combustion or explosion, but cell damage or short circuiting are potential risks the user assumes.


Battery#:3 x 18650 lithium-ion rechargeable
Dimensions:7.4″ long x 2.8″ head dia x 1.9″ body dia
Lamp Type:2 x Cree XM-L2 U2 LEDs
Light Output:1800-10 lumens
Weight w/batteries:20.8 oz
Run Time:1.75-210 hours
Focus Type:Adjustable Spot/Flood
On/Off:Pushbutton, Mid-Body
Material:Anodized aluminum
Origin:Made in China
Warranty:limited 1 year warranty through BrightGuy (damage due to battery leakage is not covered under warranty)

Product Video

Part Numbers and UPC Codes

P/N: TK51; UPC: 6942870302348 Fenix TK51 LED Flashlight – on sale while quantities last

Docs and Info


Product Accessories

Product Reviews

Fenix TK51 LED Flashlight

  • Please let us know if you would like to see something added to this product page.

    Please feel free to call us directly at 440-942-8318 or toll free 1-888-881-1908.

Fenix TK51 LED Flashlight