Fenix TK20R USB Rechargeable Flashlight

Max Lumens: 1000
Modes: 5
(96 customer reviews)

$131.00 $99.95

The Fenix TK20R USB rechargeable flashlight delivers a maximum beam distance of over 1000 feet (310m) by utilizing the CREE XPL HI V3 LED with a maximum output of 1000 lumens. Powered by a USB rechargeable 18650 battery, this flashlight can also use two cold-resistant CR123As as standby batteries. The TK20R features include a dual layer body, inner waterproofing treatment, a tactical tail switch along with a side switch, and battery power indicator. This compact, USB rechargeable flashlight is designed for tactical and industrial applications.

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Max Lumens: 1000
Modes: 5


fenix tk20r flashlight specifications chart

Flashlight Size:

Length: 6.0” (151.5mm)
Diameter: 1.0” (25mm)
Head: 1.3” (34mm)

Flashlight Weight:

5.0 oz. (141g) excluding battery


One 18650 rechargeable Li-ion battery (included)


Fenix 3.6V/2900mAh 18650 rechargeable battery, USB charging cable, holster, lanyard, spare O-ring


Limited Lifetime Guarantee from Fenix Lighting U.S.

Additional Features of the Fenix TK20R

*Due to the intelligent overheat protection, the runtime of Turbo is estimated.

  • Uses Cree XP-L HI V3 LED with a lifespan of 50,000 hours
  • Digitally regulated output maintains constant brightness
  • Low-voltage warning reminds when battery replacement/charging is needed
  • Reverse polarity protection to protect from improper battery insertion
  • Overheat protection to avoid high temperature of the surface
  • Tactical switch for momentary on and constant activation
  • Functional side switch for output selecion
  • Made of durable aircraft-grade aluminum
  • Premium type III hard-anodized anti-abrasive finish
  • Toughened ultra-clear glass lens with anti-reflective coating


96 reviews for Fenix TK20R USB Rechargeable Flashlight

  1. Chris Smith (verified owner)

    This is a positive and negative review for this light. I bought it after considerable discussion with a helpful rep from Fenix directly. My concern was that, as I was going to use it for sailing, that the seal that covered the USB port in the back of the unit was indeed watertight. I am a blue water sailor, and hard use and resistance to salt water is imperative. I was assured that it was indeed fit my criteria. Also, I was concerned that the original 950 lumens (50 lower than the PD35) would be noticeable. I was assured that in “real life” it would not be evident. I notice that the new ads for this unit say that it is 1000 lumens rated. Not sure whether there was a change in the bulb or design, but at least the “original” unit certainly seems “daylight” to me. All positives! Now for the negative. I sailed from Hawaii to Anacortes recently, and had some blowy days and nights sailing. My light failed after a day or so – it would not go on in any mode – I did find out that by unscrewing the base section, it would go on in one mode, but that opened it up to additional damage. What caused the failure? The rubber flap that seals the USB port came out and salt water spray got in – and as those that deal with salt water know, salt water and electronics do not agree. The seal is just NOT a good design. Pulling it out and pushing it in the storm pockets in my foul weather gear at night must have been the action/s that caused the failure. Astonishing bad design, in fact. It slightly protrudes over the edge of the barrel and so can get pushed out of its sealed position easily. I believe that is what happened in my case. Secondly, the base of the rubber piece that goes into the aluminum base is not robust. It has one rib in the rubber – the rubber insert part should have at least three so that the ribs can be forced down into the cavity and really have to be pulled to get it out. So: 1) tab used to pull open rubber protective flap bad design; 2) and ribs on seal itself inadequate.
    When I saw the light, I thought that this might be a problem, but hoped for the best – I had no time to return it, so took a chance. Fortunately I had a dive light on the boat and so used that.
    While I was out of warranty, the gentleman who answered the call did replace the unit with a TK15 unit that hopefully will do a better job. Not quite what I wanted, but OK. Good for customer service to step up though.
    So… I’m not sure if Fenix will publish this review, as it is negative and points out a failure with their design (for rugged and/or water use). We will see.

    10 out of 10 people found this helpful. Was this review helpful to you?
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