Fenix CL20 LED Camping Lantern Review

Updated June 7, 2023

Small enough to fit in your pocket with the power to compete with lanterns ten times it’s size The Fenix CL20 LED Camping Lantern proved to be the best of the small lamps we have tried.

Tough, tiny, bright, weatherproof, rechargeable and magnetic – we struggled to find many faults. We even put it in the freezer to see if the ‘All Season’ claims were legit.

The price tag is well worth the money for a lantern that can do so much.

fenix cl20

Out of the package it comes complete with a spare gasket and two battery options, doubles A’s or the Edison Bright C123A lithium ion battery for cold temperatures (they say down to -40 degrees). Powered by 9 white LED and 2 red LED bulbs it puts out an impressive amount of light.

fenix cl20 review

When I opened the CL20, my first thought was there is no way it’s as strong as they say it is. How could a light smaller than a baseball, light up a tent or a trail like they show in the ads? I had my doubts but as you can see it lit up our family camping tent which measures 13 x 9 feet.

We could even read by it when we hung it from the top of the tent.

fenix cl20 review

Power Settings of the Fenix CL20

Pressing the power button scrolls through the four power modes:​

  • Low. 8 lumens with a battery life of 50 to 70 hours depending on your battery choice
  • Medium. 50 lumens with a battery life of 8 to 12 hours
  • High. 100 lumens which will last 3 to 5 hours
  • Shield Your Eyes. An incredibly bright 165 lumens lasting 2 to 3 hours

​I found that the medium setting provided the right balance of good light and battery life. The higher settings are very strong and rival any of the larger lanterns we have used over the years. It is very impressive how they packed such punch in a small unit. The only downside to the high beams was limited battery life, which at the ‘shield your eyes’ setting lasts an unimpressive 2 to 3 hours.

The frosted cover does keep the light well dispersed and limits hot spots but at the higher settings it definitely isn’t glare proof. No light really is in my opinion. A bright light is a bright light and this one is no different.

The small but powerful LED bulbs threw light just as far and for much longer than the old Coleman lantern we had been using that took 6 D batteries. In the family 6 person tent we were able to read books and play cards by hanging one CL20 from the tent peak.

Setting it on high we used it for a couple of hours each night for three nights which was better than the advertised battery life on Ni-MH double A’s. From the outside, the tent was so lit you would have thought we had a huge powerhouse inside.

Putting ‘All Season’ To The Test

This ad picturing the CL20 frozen in a block of ice caught my eye. Lots of gear companies claim their stuff is weatherproof, which usually means rain, but few go this far.

fenix cl20 weatherproof

I wanted to see if the lantern would actually work in single digit temps for a prolonged period of time. The only problem, it’s November in New York and 65 degrees. Enter the freezer test. Sitting in my garage is the beast… the Frigidaire! Set at a constant 6 degrees, I thought I would give it a shot and see if the CL20 would keep burning bright after several hours next to our frozen chocolate chip pancakes and Texas toast. I made sure to put in the Lithium Ion battery, which is made for use in cold temperatures.

fenix cl20 freezer test

After 6 hours on the medium power setting, the CL20 was still cranking out the same level of light without a flicker. LED’s create very little heat so I figured it would at least have some frost on it but it did not. It was cold to the touch but less than expected which surprised me.

The Fenix CL20 passed the freezer test like a champ.

Useful Features and Practical Design

A handy ring on the bottom (which you turn to unlock/lock the base and battery compartment) allows you to hang the light in your tent or attach it to a carabiner for that late night bathroom break in the woods (I hang it from a tree branch myself).

fenix cl20 tree

The powerful magnet on the bottom is another nice touch, you can stick the lantern just about anywhere you need light. I’ve stuck mine on my patio, car, camp table, camp chair and even a curtain rod in the house during a power outage. It’s one of my favorite features of the CL20.

fenix cl20 light

Battery Options

Remove the base and you will notice three battery bays. One for the LI battery, and the two AA battery bays on top of that.

​I made the mistake of loading them all in not realizing you have to choose one or the other or the base won’t lock properly

fenix cl20 battery life

Ni-MH AA batteries will give you the longest battery life, followed by regular alkaline AA batteries, followed by the lithium ion CR123A which is the least efficient.

fenix cl20 battery life

I rarely bring any kind of charging station with me on a camping trip, especially on an ultralight trip which this lantern is made for. So I opt for regular ole’ AA batteries instead of the other two options. The battery life is good and you can find them everywhere.


We’ve read the online reviews of the Fenix CL20 and here’s what other buyers had to say:

The Good:

  • Extremely bright
  • Ultra-compact
  • Magnet and ring let you put it anywhere
  • Truly weatherproof
  • Good battery life

The Bad:

  • Heavy for the size
  • Battery life could be longer

It was a challenge to find any real negative reviews. I only found 2 or 3 and they had little to do with the actual lantern itself and how well it worked. While the weight of the light is heavy, the tiny size more than makes up for it. Frankly I didn’t find it heavy at all. And battery life is always a point of contention with this type of product. Everyone wants longer life at higher power, myself included. The CL20 has average battery life, no better and no worse.


Since the time of this review I have purchased two more Fenix CL20’s for myself, one of which is stuck to my refrigerator in case of power outage (a tip I read in one of the many positive reviews). I have also purchased several more for my friends that have everything – and they love it.

fenix cl20

If you need a strong, ultra-compact lantern and value versatility, quality, power and weatherproofness, the Fenix Cl20 should be at the top of your list.

Update: Since I released this article, Fenix Lighting released a new version of the Fenix CL20 – the Fenix CL20R! The Fenix CL20R actually addresses the two biggest complaints about the CL20 – weight and battery life.

It’s brighter, has twice as much battery life, smaller, lighter, and completely rechargeable! It’s twice as bright and runs twice as long – I’m overly impressed. These will definitely be replacing my CL20’s for more efficiency and hopefully no more wasting batteries!

As always, thank you for visiting Gear Cloud. We appreciate your time and hope this article was helpful.

Written by Hutch


Hutch is the founder of Hiking.Earth. He comes from an outdoors and environmental background and helps people love and enjoy the outdoors and protect the planet.