Fenix UC35 V2.0 USB Rechargeable Flashlight-1000 Lumens

Max Lumens: 1000
Modes: 6
(384 customer reviews)

$120.00 $89.95

Custom Engraving Available for this Flashlight. SHOP NOW >fenix custom shop

The Fenix UC35 V2.0 rechargeable flashlight is the 2018 upgrade to the Fenix UC35 flashlight. Fitted with the Cree XP-L HI V3 LED, this light delivers a maximum 1000 lumens at a distance of 873 feet (266 meters). Turn the light on and off with the tactical tail switch and cycle through the six lighting modes via the newly designed metal side switch—which also has a built-in battery level indicator. You can achieve an incredible 800 hours of runtime when using the new moonlight brightness level. Compact and built-tough, the Fenix UC35 V2.0 flashlight is IP68 rated; dust proof and waterproof underwater to two meters.

2018 upgrade improvements over prior Fenix UC35:

-XP-L HI v3 LED provides greater brightness, efficiency and throw
-Improved stainless steel side switch with battery level indicator
-New body design is more compact
-Includes higher capacity 3500 mAH rechargeable battery for longer runtime
-USB port improved to charge faster and is easier to activate
-Improved waterproof and dust-proof rating (IP68)

For commercial orders and large purchases, contact us at (888) 775-9996 x6, or
WARNING. Be aware of counterfeit Fenix merchandise in the U.S. marketplace.

Max Lumens: 1000
Modes: 6


ansi chart specifications uc35 flashlight

UC35 Size:

Length: 5.5” (140mm)
Body: 0.9” (23.5mm)
Head: 1.0” (25.4mm)

UC35 Weight:

3.1 oz. (89g) weight excluding batteries

UC35 Battery:

One rechargeable 18650 Li-ion battery (included) or two CR123A batteries. NOTE: The light will not work with flat-top 18650s.  We recommend any of the ARB-L18 series from Fenix for backup or replacement.


ARB-L18-3500 Li-ion battery, Micro-USB charging cable, body clip, spare rubber switch boot, lanyard, holster, two spare O-rings


Limited Lifetime Guarantee from Fenix Lighting USA

Notice: Parameters lab tested with a Fenix ARB-L18-3500 18650 battery and may vary between flashlights, batteries and environments.

Additional Features of the Fenix UC35

  • Cree XP-L HI V3 LED, with lifespan of 50,000 hours
  • Powered by one 18650 rechargeable Li-ion battery or two 3V/CR123A Lithium batteries
  • 5V/2A Micro USB rechargeable, included 18650 rechargeable Li-ion battery
  • Battery level indication and low-voltage warning function
  • Digitally regulated output maintains constant brightness
  • Reverse polarity protection to protect from improper battery insertion
  • Anti-roll and anti-slip body design
  • Tactical tail switch features instant activation
  • Functional side switch for output selection
  • Made of durable high-strength and oxidation-resistance aluminum
  • Premium type HAIII hard-anodized anti-abrasive finish
  • Toughened ultra-clear glass lens with an anti-reflective coating


The tail switch is the tactical switch, and the side switch is the functional switch.


Tap the tactical switch to momentarily turn on the light; release it and the light will go out.

Fully press
Fully press the tactical switch to constantly turn on the light; press once again to turn off the light.

Output Selection

With the light switched on, single click the functional switch to cycle through Turbo→Moonlight →Eco→Low→Med→High.


With the light switched on, press and hold the functional switch for 0.5 seconds to enter strobe, click once again to return to General mode.

Boot-up Battery Level Indication

Each time the light is turned on, the battery level indicator will automatically display the battery status for 3 seconds.

  • Green constant on: saturated
  • Green flashes: sufficient
  • Red constant on: poor
  • Red flashes: critical

Note: There is no indication when CR123A battery is used.

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.

Intelligent Protection

The light will accumulate a lot of heat when working at Turbo mode. When the light is overheated up to 60°C or above, the flashlight will automatically step down a few lumens to reduce the temperature; when the temperature is lower than 60°C the output will gradually return to Turbo output level.

Low-voltage Warning

When the voltage level drops below 3V, the flashlight is programmed to downshift to a lower brightness level until Moonlight output is reached. When this happens in Moonlight mode, the battery level indicator will flash red to remind you to replace the battery. To ensure normal use, the flashlight will work until the battery runs out or the battery over-discharging protection activates.

Note: The low-voltage warning only works with rechargeable Li-ion 18650 battery, not with disposable CR123A’s.


  1. Turn off the light. Plug the USB side of the charging cable into any USB power supply. Uncover the dust cover of the light, and plug the Micro USB side of the charging cable into the charging port of the light.
  2. The battery level indicator displays red while charging and turns to solid green when charging is complete. The normal charging time of the included Fenix ARB-L18-3500 is about 3.5 hours.
  3. Once charging is completed, be sure to remove the charging cable and replace the dust cover to protect against dust and foreign objects.
  4. Recharge a stored light every four months to maintain optimum performance of the battery.
  5. Only Low output can be used while the light is being charged, but charging time will be prolonged.

Battery Replacement

Unscrew the tail cap to insert the battery with the anode side (+) towards the light head, then screw the tail cap back on.

Usage and Maintenance

  • Disassembling the sealed head can cause damage to the light and will void the warranty.
  • Fenix recommends using an excellent quality battery.
  • If the light will not be used for an extended period, remove the battery, or the light could be damaged by electrolyte leakage or battery explosion.
  • Unscrew the tail cap half a turn or take out the battery to prevent accidental activation during storage or transportation.
  • Long-term use can result in O-ring wear. To maintain a proper water seal, replace the ring with an approved spare.
  • Periodic cleaning of the battery contacts improves the lamp’s performance as dirty contacts may cause the lamp to flicker, shine intermittently or even fail to illuminate for the following reasons:

A: The battery needs replacing.
Solution: Replace battery (Ensure battery is inserted according to the manufacturer’s specifications).

B: The threads, PCB board contact or other contacts are dirty.
Solution: Clean the contact points with a cotton swab soaked in rubbing alcohol.

If the above methods don’t work, please contact your authorized distributor. 

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.

384 reviews for Fenix UC35 V2.0 USB Rechargeable Flashlight-1000 Lumens

  1. Ely Jennis (verified owner)

    This truly deserves one star – because it works. Functionally this light is fairly useless. Generally, you buy a Tactical light and pressure switch so you can mount the light to a weapon. That’s also why Fenix’s “Tactical Lights” are compatible with pressure switches. Here’s the problem: On the Fenix “tactical light” I tried, you cant engage the strobe mode with the pressure switch. This alone would negate the function of the light but it gets worse! The cord for the pressure switch is far to short to reach the trigger assembly on a shotgun or a rifle. It’s completely useless for its intended purpose. It’s just plain useless in a home defense kit. If you want a bright flashlight you can purchase any other Fenix lights, but purchasing a Fenix Tactical light doesn’t seem like the best choice. They were clearly designed by someone who’s never even thought about a “tactical” situation. It’s unfortunate because many of the reviews neglect to mention this. Most probably buy the light as a general-purpose light. I think people just think the word “tactical” sounds cool as a styling term but in reality, it should represent the features and function of the product.

    1 out of 1 people found this helpful. Was this review helpful to you?
    • Dianne (store manager)

      I understand you have contacted warranty to return this as it was not working for your weapons set up.

  2. Jason (verified owner)

    I’ve only had it a few weeks and something is wrong with the dimmer switch!

    Was this review helpful to you?
    • Dianne (store manager)

      I have asked warranty to reach out to you.

  3. Sergey Bikowsky (verified owner)

    Battery died after flashlight fell from 3ft. on the floor

    3 out of 3 people found this helpful. Was this review helpful to you?
    • Dianne (store manager)

      I will have someone from warranty contact you.

  4. Vincent Santa (verified owner)

    Light stopped working 2 weeks after purchased.

    1 out of 1 people found this helpful. Was this review helpful to you?
    • Dianne (store manager)

      Hi Vincent – I will have someone from Warranty reach out to you.

  5. Gregory S. (verified owner)

    Battery would not hold a charge. Had to mail battery to warranty department, before I could get a replacement battery. That’s a lot of trouble to put a good customer like I am, I own several of your flashlights.
    Still haven’t received battery. Flashlight dead!

    4 out of 4 people found this helpful. Was this review helpful to you?
    • Dianne (store manager)

      Looks like there was miscommunication in warranty with someone asking you to send in the battery first, and I’m sorry that happened.

  6. James

    Worked great first few weeks. Now only comes on (very dim) if on charger battery shows green but once unplugged does not work at all have cleaned and checked all connections

    2 out of 2 people found this helpful. Was this review helpful to you?
    • Dianne (store manager)

      I will have someone from warranty contact you.

  7. Ralph Mendoza (verified owner)

    worked great for a few days.. now randomly jus shuts off, and charge light is red only bout a min.. even though battery is obviously not fully charged

    2 out of 2 people found this helpful. Was this review helpful to you?
    • Dianne_G (store manager)

      Sorry to hear that Ralph – I will have Colt in Warranty get in touch with you to help.

  8. Thomas Moran (verified owner)

    Battery indicator button popped off after 1 month. I cant use the strobe function anymore.

    1 out of 1 people found this helpful. Was this review helpful to you?
    • Dianne_G (store manager)

      Sorry to hear that – I’ve asked Colt in warranty to get in touch with you to help you on that.

  9. Gary Carter (verified owner)

    I have purchased 4 of these flashlights. One lasted about 8 months and fell out of my pocket while sitting on a bucket, now does not work. The other one the mode button fell out which they did replace. The next one just stopped working and sometimes does go on but wont shut off. The last one I have not taken out of the box yet. Two of them were Christmas presents. I guess I am going to be the Grinch.

    Was this review helpful to you?
    • Dianne_G (store manager)

      Hi Gary – look for a message from Colt in warranty to help out on this.

  10. Anonymous (verified owner)

    Charger does not work

    Was this review helpful to you?
    • Dianne_G (store manager)

      Sorry to hear that – I will have someone from our warranty and repair department contact you to help.

  11. Gary Carter (verified owner)

    Mode button fell out and flashlight was replaced right away. I only had it for one week. Other flashlights on-off buttons did not last hope this one does. I do work in the trades and this is in my pocket everyday. So far I would recommend this to other people.

    Was this review helpful to you?
Add a review

Your email address will not be published. Required fields are marked *

You may also like…