Operating Instruction
Switches
Master: controls General mode and output selection
Auxiliary: controls Flash mode and output selection
ON/OFF
ON: With the light switched off, press and hold the Master switch for 0.5 seconds to enter General mode, press and hold the Auxiliary switch for 0.5 seconds to enter Flash mode on strobe.
OFF: With the light switched on, press and hold either switch for 0.5 seconds to turn off the light.
Mode switching
In General mode, single click the Auxiliary switch to enter Flash mode.
In Flash mode, single click the Master switch to enter General mode.
Output Selection
In General mode, single click the Master switch to cycle through Eco→Low→Med→High→Turbo.
In Flash mode, single click the Auxiliary switch to cycle through Strobe→SOS.
Note: When the battery level gets extremely low (about 4%), the light can only be lit up on Eco. The Flash mode will be locked and irresponsive to any operation.
Instant Strobe
With the light unlocked and switched off, press and hold the Auxiliary switch for 0.5 seconds, or single click the Auxiliary switch on General mode, the light can enter instant strobe.
Lockout Function
Lock: With the light unlocked, simultaneously press the two switches for 3 seconds, the light will blink at Low twice to indicate locked status.
Unlock: With the light is locked, simultaneously press the two switches for 3 seconds, the light will be unlocked and activated on last used brightness.
In locked status, clicking or pressing the switches will activate 2 one-second blinks at Low to indicate locked status.
Battery Level Indication
With the light switched off, single click the Auxiliary switch, the OLED screen will display the battery status percentage, and then goes out in 5 seconds.
Charging
Plug the USB side of the charging cable into the any USB power supply, uncover the anti-dust cap of the light. And plug the Micro USB side of the charging cable into the charging port of the light. When charging the OLED screen will display, and current battery level will be displayed. When the light is fully charged, the OLED screen will display. 5V/2A adaptor is recommended and the normal charging time is about 4 hours.
Note:
1. Once charging is completed, be sure to remove the charging cable and replace the anti-dust cap to protect from dust and foreign objects.
2. Recharge a stored light every four months to maintain optimum performance of the battery.
Intelligent Memory Circuit
The light memorizes the last selected brightness level on General mode. When turned on again the previously used brightness level will be recalled.
Overheat Protection
The light will accumulate a lot of heat when it is working at Turbo mode. When the light is overheated up to 65 ℃ or above, the output will be automatically downshifted to half of turbo to reduce the temperature, and the screen will display Level 5 -.
Usage and Maintenance
Disassembling the sealed head can cause damage to the light and will void the warranty.
The flashlight may flicker, shine intermittently or even fail to illuminate for the following reason:
A: Poor battery level.
Solution: Charge the light in time
Warning
This flashlight is a high-intensity lighting device capable of causing eye damage to the user or others. Avoid shining the flashlight directly into anyone’s eyes.
Gregory Green (verified owner) –
great light, bright, easy to hold and use
Don Griffin (verified owner) –
Great flashlight! The adjustable brightness and recharge-ability makes this a must have light. They also make perfect gifts.
mitch c. (verified owner) –
Fits well in your hand. Love that it is rechargeable. This is by far the brightest flashlight I have ever owned. This is my 4th Fenix handheld flashlight.
David Crawford (verified owner) –
My 3rd Fenix flashlight!! There is no better flashlight!!!
Nicholas M. (verified owner) –
Portable Flood Light. Thanks Fenix.
Chris M. (verified owner) –
Mind blowing!! Light packs a big punch. USB rechargeable is super convenient when traveling between jobs.
William Graham (verified owner) –
A very well made flashlight. The highest of quality. I use it to walk my German Shepard by the river every night. Lots of critters to see. Levels 3 & 4 are perfect for this while 5 makes a statement. Buttons are very user friendly and functional. Easy access to strobe helps with the large cats. They hate it. Love this light.
Brian D. (verified owner) –
This is an amazing flashlight! If you want bright, this is the one. It is a little heavy, but the battery lasts over 7 hours on Level 3 (this is bright enough for just about any need). Level 4 is about the same as High on my UC35. And Level 5 turns night into day! I love it.
Elizabeth (verified owner) –
So far really good. Dropped it in a creek while it was turned on and it came out fine. Battery seems to be good.
David (verified owner) –
Like this light a bunch; great for sweeping the yard before letting the dogs after dark but I wish it had a bit more of a focused beam. Can get a bit warm real quick on the higher settings.
Eric Simon (verified owner) –
Light is just ok. I use the light for everyday carry and here are some of the issues I have ran into. The first problem is the power switches. I use the light in the provided holster and the switches protrude from the housing causing the buttons to get bumped and activate the light. There is a lockout feature on the light but that is such a pain to use and when I need light it is generally on emergency basis. Second problem, charging port cover. The charging port is located on the opposite side as the power switches and the cover gets caught on the side of the holster when inserting the light. I’m sure the charging port cover will get ripped off sooner than later with all of the times the light gets re-holstered. Third problem; standing upright. One of the best ways I have found to light up a room is by directing the beam of a flashlight at the ceiling of a room. This light has two notches on the back for a lanyard to attach to and they do not allow the light to stand upright very easily. The light needs to be on a very smooth and flat surface for it to stand upright. My suggestion to Fenix would be to recess the switches and the charging port cover and shave the tabs off the back.
Other than the three problems noted above I love the light and will continue to use it for EDC. The screen for the battery readout, high lumen output, and size are great features and the main reasons for purchase.
Andros –
Best Flashlight I have owned. Love the time left feature on every lumen level.
philip swiney (verified owner) –
This light is awesome,
Darrell Brown (verified owner) –
Not quite as bright as I thought it would be
Beverly (verified owner) –
It is a great size and weight and design makes it easy to carry. The controls are easy to operate and the amount of light it produces is amazing. Highly recommended!
Trent Williams –
I received my torch today, and it is awesome – very bright. The 2nd light I’ve bought by Fenix. Very satisfied, and looking forward to years of reliable service from this light. Great size.
Steven Moore (verified owner) –
The best flashlight I’ve ever owned. I love it.
Anonymous (verified owner) –
Not happy, return process is far from streamline.
Ray Rodriguez (verified owner) –
by far best device that emits light that i ever owned………period
david (verified owner) –
Great product/quality
Charles N. (verified owner) –
Absolutely love this flashlight. Purchased it for my home inspections. I love that there’s 4 modes, highest being over 3000 lumens. I needed a rechargeable flashlight and this fits the bill. Wasn’t initially seeking out this feature, but love the LCD display that shows battery life. Highly recommend
Vladimir Revzine (verified owner) –
very good
charlesn4444@gmail.com (verified owner) –
I purchased this flashlight for my home inspections. Needed a flashlight with high output (greater than 2000 lumens) but also be able to scale down to 1000 lumens when needed. And it had to be rechargeable. This flashlight fits the bill and then some. I love that fact that it’s small enough to fit in my pocket when not in use. Hopefully this light will last me a while. Absolutely love it so far.
Anonymous (verified owner) –
The two features that made me get this flashlight are the high lumen output and self contained rechargeable batteries. The adjustable brightness is great and I like that the beam is more a flood than spot as I plan on using it away from urban areas. Using a 5V/2A converter gets the battery fully charged in a reasonable amount of time.
Rick Sanchez –
This light is amazing! No more not knowing when the light is about to die, this thing puts out a massive amount of light, and lets you know how much battery you have left the whole time. And that battery will run forever. I bought it as an EDC, but it was a bit bulkier than what I liked, so I ended up also getting a UC30. Couldn’t bring myself to get rid of this one though, I use it more than all my other lights. Great job Fenix!
Robert Peeters (verified owner) –
Over the years I have purchased nine (9) Fenix Lights. I got my first, an LD20, as a gift about ten years ago. From the AA battery operated LD20 to the 4000 Lumen TK75, and seven other various sizes. I collect them. This UC52 looks like a beauty. I like it’s simplicity in operation. One click, you’re on SOS Mode, one click to the Strobe Mode. A very helpful characteristic is the little LED that shows how much time one has left on each level of brightness. i.e. 80 hrs@Level 1; 27 hrs@Level 2 ; 8 hrs.@Level 3; 3:40 hrs@Level 4; and about 1 hr. @Level 5, Turbo. ( My readings at full charge )
I discharged the UC52 fully and charged it through the USB connector. It took about 3 hrs. This light has to have a voltage step-up transformer for charging. It has a 7.2v built in battery, but the output voltage at your USB port is only 5.0v, and we know that any d.c. battery had to be charged above the potential of the battery.
To conclude, I feel this will be one of my favorite Fenix Lights. It takes the guesswork out of knowing how much time I have left at each intensity level. Fenix does it again in their improvement and utilities of their products.
Burt Denenstein –
I just received my UC52 yesterday and it is going to live in my car. The strobe will be a good first line of defense when I go somewhere that I cannot carry anything else. I am disappointed that a light in this price range does not have direct access to Eco and Turbo and there is no way to know what level it will start at when you press the power button. Since turbo is so bright it could be a bit of a problem in a dark room if you are not expecting it. I will have to try to remember to switch to Eco before turning it off which is a bit of a pain. Something like a longer press for direct access to Eco and maybe a double click for direct access to Turbo would make this a great light