Fenix C7

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Fenix C7 review

Fenix C7 specifications

Brand/modelFenix C7
LEDLuminus SST70
Beam intensity55,200 cd / 470 meters
Battery config.1*21700
BlinkiesStrobe, SOS
Review dateSeptember 2021


The C7 was sent before there was any reference anywhere on the internet about this particular model. It was shipped in a normal brown carton box and not product packaging. Just before publishing this review the details were available on their website, so I could add some of the details.

Most people who own Fenix flashlight know about the E-series, PD-series, TK-series, etc. But this is the first flashlight in Fenix’s C-series I encountered. A new category? I’m not 100% sure yet what kind of category this is, but I found out there is a C6 as well, but not available in the US, or EU. I found the C6 v3 available in India.

From the bottom (tail) up to the head, this light looks similar to the Fenix E35 V3 we reviewed earlier. It’s only the size and shape of the head (and switch) that look different.

Package quality.

The C7 was shipped without any original packaging or accessories, so keep in mind that the final product will have all that, but this is what I personally received:

  • The Fenix C7
  • Lanyard (pre-installed)
  • Pocket clip (pre-installed)
  • Magnetic tailcap (pre-installed)
  • Fenix ARB-L21-5000 battery

Update: Fenix added the C7 to their website. This is what you can get besides the things mentioned above:

  • Spare o-ring
  • User manual
  • Warranty card
  • and of course a nice box

Flashlight in use

There’s only a single switch, so you don’t have to change hand position (upper/underhand) for power and changes modes. Just grab it, and use it as you wish, single-handedly.

The switch is located just below the head and has a grey rubber cover. There’s a little indicator LED, which will only show when the light is and is, therefore, hard to find just by the feel.

If you want, you could probably add some glow-in-the-dark sticker, or position the pocket clip in the direction of the switch. There are tricks to get around this, but it would be helpful to have a switch that can be found easier in the dark.

There’s a few ways of carrying/using the Fenix C7. There’s a pocket clip, a lanyard, and it has a magnetic tailcap. And there’s always some holsters you can get, separately. And since the tailcap is flat, you can use it tail standing, like a candle, without any problems.

When the tailcap is tightened the lanyard almost sits in line with the switch, so if yours is the same, that could help to locate the switch in the dark.

Build Quality, and Warranty

Fenix flashlights have been around for many years, so they know how to build high-quality products. And the C7 is no exception here.

There’s only 1 thing you can unscrew, and that’s the tailcap. You have to make 6 full turns to remove the tailcap, and it is protected with a rubber o-ring and lubrication to keep the water out. Lubrication also helps to make unscrewing the tailcap go as smooth as butter. And when you unscrew and remove the tailcap, you will automatically pull the battery out because of the magnet in the tailcap.

One thing that I’m not too great of a fan of is Fenix’s anodization. I’m not saying it’s low quality, because that’s not true. I’m talking about the finish. The anodization has a bit of a shiny finish, and I personally prefer a softer look with a more matte finish. Again, that’s just my personal opinion, and you may actually love the anodization.

There’s very fine redding, all around the body, and some redding on the tailcap to remove the tailcap more easily. This type of machining and finish is typical for Fenix and is kind of a branding feature. You can ‘see’ if it’s a Fenix flashlight by looking at the design, redding, etc.

That’s usually something that newer brands have difficulty with. They use any kind of design and features that aren’t unique, and therefore it won’t help their branding.

Fenix has a generous warranty, where they provide lifetime warranty against any defect in material and workmanship. For all the details, I like to refer you to their website: https://www.fenixlighting.com/support/warranty-repairs/

LED, Lens, Bezel, and Reflector

We’re reviewing LED flashlights, so yes, this part of the review is pretty important for sure. Unfortunately, there’s no specifications available at the time of reviewing, so I’ll just share what I see and measure.

It’s interesting to note that the C7 has no regular bezel like most other flashlights. The bezel is part of the head design. The head and bezel are one. The parts are glued together to keep any trespassers out. And if you really want to look inside, you better get your heat gun ready or your rubber strap wrenches.

From the front, you can see an ultra-clear glass lens and a smooth reflector. Deep inside the reflector is an LED installed and centered perfectly with a white centering ring. I’m pretty sure the LED is a Luminus SST70, and I used an Opple Light Master III to measure the temperature (CCT) and CRI, and these were the results: 5300K and 63 CRI.

I’m not really sure how trustworthy the CRI numbers are, but at least it’s below 70.

Dimensions and size comparison

  • Length: 148.35 mm / 5.8 ”
  • Head diameter:  40 mm / 1.58 ”
  • Body diameter: 27 mm /  1.06”


  • Empty: 174.2 g / 6.15 oz.
  • With battery: 247 g / 8.71 oz.

Flashlight comparison

Size compared to other Fenix flashlights

From left to right: Fenix TK22 v2, Fenix C7, Fenix PD36R, Fenix TK11TAC, Fenix PD35 TAC, Fenix E35 v3.

And compared to some other, military-type tactical flashlights.

From left to right: Jetbeam Jet TH20, Nitecore MH12S, Fenix TK22 v2, Olight Warrior X Pro, Fenix C7.

Driver & User Interface:

Okay, we arrived at how this thing actually works. Most (if not all) flashlights have drivers these days, and for many people, this can be the difference between hating and loving a flashlight. It could even come down to, what some people would think, some minor differences.

So, the C7 has a pretty simple and straightforward UI. Long press for on, and clicks for changing modes.

Available modes:

  • 5: Moon, Low, Medium, High, Turbo?
  • Strobe, SOS

From OFF:

  • Single-click: Battery check
  • 2+ clicks: lock-out
  • Press and hold <1sec: to last used mode
  • Press and hold >2sec: Strobe
    • Single click to jump from strobe to SOS

From ON:

  • Single-click: Cycle through the menu from Low to High
  • 2+ clicks: nothing, it just runs through the menu
  • Press and hold <1sec: to last used mode
  • Press and hold >2sec: Strobe
    • Single click to jump from strobe to SOS


  • To Turbo: none
  • To Moon: none
  • To Strobe: press and hold for more than 2 seconds

Mode memory:

  • Yes, except Strobe and SOS

Blinky modes menu:

  • Press-and-hold for more than 2 seconds in either On or Off position to enter strobe mode. A single click will change strobe to SOS

Low battery warning:

  • The side switch has a small indicator LED to show the battery status.
  • I believe this is similar to other Fenix flashlights (green for 80+% battery, and blinking red for below 10%)

Lock-out mode:

  • Double click from Off, and repeat to deactivate


  • None

Batteries & Charging

The C7 has a built-in charging system, so you don’t have to buy a 21700 charger or anything. You can use any USB-A to USB-C cable and charge the C7. I didn’t have a USB-C to USB-C charger at the moment, so can’t check that.

Below 3V the charge current is very low, at around 0.13mA, and once it’s above a certain Voltage, the speed goes up. It’s interesting to see the current starts at around 1.49A, but slowly increases slowly over time, and 30 minutes later it is charging at around 1.64A.

Unfortunately, flat tops won’t fit. There’s a physical reverse polarity protection so a flat top won’t make contact with the driver. That’s safe, but a pity if you have lots of flat tops lying around.

Button tops, unprotected also work well.


Lumen measurements:

All output numbers are relative to my homemade Integrating Sphere. It is set up with an Extech SDL400 Lux Meter for measurements including a Kenko PRO1D ND-16 filter. The base measurement is done with a Convoy S2+ that has been tested at 255 lumens.

All of my readings were taken from a fully-charged Fenix ARB-L21-5000.

Amps were measured with a Fluke 77III, at the tailcap, and the highest with a Fluke clamp meter

10.06 A3034.4034.40
20.16 A100110110111
30.65 A400443444441
43.23 A1400147714711414
58.8 A3000 lm2882 lm2811 lm1268 lm

Edit: Fenix added the flashlight to their website, so I updated the table above.

Parasitic drain:

  • 17µA (micro amps)


The runtime test was done with the 50cm integrating sphere, including the Kenko Pro1D ND-16 filter and Extech SDL400 data logging Lux Meter.

In the first graph you can see runtimes of all modes, except Moon.

Turbo mode starts around 2900 lumens and starts dropping slowly right of the bat. At exactly 6 minutes the output is about 1270 lumens. After 2 more little drops, (around 34 minutes) the output stays around 1090 lumens for a while. At 1 hour and 50 minutes, the output starts dropping rapidly, at which point you should replace the battery. At 2 hours and 7 minutes, the output drops from around 400 lumens down to 100 lumens at which point the total runtime is established. At that point the flashlight hasn’t fully turned off yet. It will maintain a low output (including a few more drops) till it really turns off at 5 hours and 8 minutes. (Specs: 1 hour)

The runtime for high mode looks similar to Turbo, except of course for the first few minutes. From 35 minutes it is pretty similar, and the runtime is 2 hours and 6 minutes. At this point it drops to below 100 lumens. The light keeper running for a few more hours on a very low output. (specs: 2 hours)

Note: Please keep in mind that the LVP (low voltage protection) is probably set at around 2.5 or 2.6V. After my runtimes, the Voltage was usually between 2.55V and 2.65V. This is not recommended, so you better replace the battery when the light starts dropping to about 10% of the initial output.

Medium has a stable output of 440 lumens for 6 hours and 16 minutes when it starts to taper off. At 6 hours and 39 minutes the output drops from 420 lumens down to roughly 110 lumens. At 6 hours 55 minutes it drops from 100 down to 30 lumens, at which point the runtime test has completed. But the light doesn’t shut off yet, until 9 hours and 45 minutes. (Specs: 7 hours)

Low starts at around 110 lumens and continues this for 26 hours and 24 minutes, before it drops to 30 lumens. 3 hours later, at 29 hours and 16 minutes, the flashlight turns off. (Specs: 29 hours)

I haven’t tested the runtime for Moon mode, which is supposed to run for 68 hours.

Throw Measurement

Measurements were taken indoors at 5 meters with a professional Hagner E4-X Lux Meter. Numbers were written down 30 seconds after start, and can be seen in the Measured candela column. Meters and yards are related to the candela measurement.

ModeSpecs candelaMeasured candelaMetersYards
Turbo55,200 cd54,000 cd465508

My measurements were higher from Eco to High, and a tiny bit lower in Turbo mode. This difference is negligible.


For the following beamshots I used a Canon EOS 5D Mk2 and a 50mm lens. manual settings: ISO1600, 1/4sec , F4, 5000K

The shed is about 65 meters / 71 yards away. 

Beamshots comparison:

Disclaimer: This flashlight was sent to me for review at no cost by Fenixlighting. I have not been paid to review, nor have I been holding back on problems or defects.

Final Verdict


  1. Includes a 21700 battery
  2. Has built-in charging (USB-C)
  3. Nice output
  4. Long runtime


  1. UI: long press for on/off, clicks for changing modes, no shortcuts for Moon or Turbo.

Explanation on star ratings:

1: Avoid: my phone flashlight would be a better choice – 2: Poor: significant defect or issues, much better options available at the same price – 3: Average: some defects or issues – 4: Good: recommended (minor issues) – 5: Great: highly recommended

Reviewer Marco
Author: Marco

4 stars: ★★★★

I didn’t know what to expect from the C7 because there was no information available on the internet at the time of starting this review. It’s the first flashlight in Fenix’s C-series, which had no history or whatsoever.

Just before finishing all the test, Fenix announced the flashlight publicly, so I added some of their specs to this review.

Personally, I’m not a fan of long-press for on/off, without shortcuts to Moon (eco) or Turbo.

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1lumen selects and reviews products personally. We may earn affiliate commissions through our links, which help support our testing.