Fenix E03R Keychain Flashlight

Max Lumens: 260
Modes: 6
Battery: Built-in
(184 customer reviews)


The Fenix E03R rechargeable keychain flashlight will produce a maximum 260 lumens and throw the light a distance of 138ft (42m). The top switch operates on/off and allows you to select from six lighting modes, including four brightness levels plus red light and red flashing. The battery level indicator lets you know when the battery needs charging. Quickly recharge the built-in battery via the USB Type-C charging port. At less than 2″ long, not only is it the perfect everyday carry size, but it is rugged too with an IP66 rated splashproof and dustproof rating. Keep this light on your keys, in a pocket, or in a drawer to always have a flashlight at your fingertips. The E03R would even make a great gift that person in your life that you know should have a bright light handy at all times, but that you can’t convince to carry a full sized flashlight. Astonishingly bright for its small size, we know the Fenix E03R will become an instant favorite keychain flashlight.

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: 260
Modes: 6


E03R spec sheet

E03R Size:

Length: 1.85” (47mm)
Width: 0.94” (24mm)
Height: 0.47” (12mm)

E03R Weight:

0.78 oz. (22g) including battery

E03R Battery:

Built-in 200mAh Li-polymer battery


Key chain, USB Type-C charging cable
Please note: The E03R DOES include a USB Type-C charging cable for orders after 8/20/20.


Limited Lifetime Guarantee from Fenix Lighting USA

Additional Features of the Fenix E03R Keychain Flashlight

  • MATCH CA18 white light LED and Everlight 2835 red light LED, with a lifespan of 50,000 hours.
  • Built-in 200mAh Li-polymer battery.
  • Battery level indication and low-voltage warning.
  • Intelligent overheat protection against high surface temperature.
  • All-metal CNC machining light body.
  • Premium type HAIII hard-anodized anti-abrasive finish.
  • Recessed switch and lockout function.

Operating Instructions of the Fenix E03R Keychain Flashlight

Press and hold the switch for 0.5 seconds to turn on/off the light.
Press and hold the switch for 1.2 seconds to turn on the red light.

Output Selection for Keychain Flashlight
White light: single click the switch to cycle through Eco→Low→Med→High.
Red light: single click the switch to cycle through Red→Red Flash.

Lock: with the light switched off, double click the switch to lock the light, the light will blink twice on Low to indicate locked status.
Unlock: with the light locked, double click the switch, the light will be unlocked and activated on Low.
In locked status, clicking or pressing the switch will activate 2 one-second blinks on Low to indicate locked status.

Charging Your Keychain Flashlight

  1. First switch off the light and plug the USB A socket of the charging cable into an electrical outlet, then connect the USB Type-C socket of the charging cable to the light.
  2. The indicator will display red while charging, and will turn to green when fully charged.
  3. Once charging is completed, be sure to close the anti-dust cover.


  1. The normal charging time is approximately 1 hour and 20 minutes from depletion to full charging.
  2. Recharge a stored light every four months to maintain optimum performance of the battery.

Battery Level Indication
With the light switched off, single click the switch to check the battery status. The battery level indicator will display the battery status for 3 seconds.

  • Green constant on: saturated (100% – 70%)
  • Green flashes: sufficient (70% – 40%)
  • Red constant on: poor (40% – 10%)
  • Red flashes (2Hz): critical (10% – 1%)

Note: The battery status will be displayed each time the light is switched on.

Intelligent Protection
The light will accumulate a lot of heat when used on High output level for extended periods. To reduce the temperature, the light will automatically step down a few lumens. High output level can be reselected if needed.

Low-voltage Warning
When the voltage level drops below the preset level, the flashlight is programmed to downshift to a lower brightness level until Eco output is reached. When this happens on Eco output mode, the battery level indicator blinks red to remind you to recharge the battery. To ensure normal use, the flashlight will not turn off automatically and will work till the battery is depleted.

Usage and Maintenance

  • Fully charge the light in time to ensure normal use next time.
  • Recharge a stored light every four months to maintain optimum performance of the battery.
  • Once charging is completed, be sure to close the anti-dust cover.


  • 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.
  • All information provided in this manual is subject to change without prior notice.

184 reviews for Fenix E03R Keychain Flashlight

Based on 184 reviews

Customer Images

Image #1 from boodo
Image #2 from Reuben S.
Image #1 from boodo


Before I bought this E03R here in Slovenia, I watched many YT presentations. There were some complaints that it has no memory and always returns to the weakest strength when turned on. For this type of tinny torchlight this is acceptable and even make sense I believe. I have a lot of flashlights, too many in fact. So I was pleasantly surprised how all the “switches”: on, off, lock, changing between white and red light, battery indicator, everything, are thoroughly thought out. A and the response times between pressures are perfectly chosen = determined. At least for me, nothing really bothers me, which is quite unusual. Really perfect approach. I am always happy (but unfortunately this very rarely happens) with such carefully thought-out product. ★★★★★

(0) (0)
Image #2 from Reuben S.

Reuben S.

Way smaller, way brighter than expected. I was expecting a flashlight that was approximately the size of the keyfob for my vehicle, but it's actually about half the size. What a pleasant surprise. I've carried it around with me for about a month now, and unlike other reviewers, I haven't yet had the light turn on by accident. It charges with USB-C port, which is perfect. I took a few photos to show how much brighter this is than the LED light on my phone, but it really wasn't a fair comparison. It's in a completely different class of light. As a home inspector, I was turned on to the 258 lumen Fenix TK11 back around 2008 or so, and I thought it was the greatest thing ever, compared to the huge flashlights that I used to use. I've moved on to bigger and better flashlights since then, but I still have my TK11, so I pulled it out of retirement to take some comparison images with the EO3R. This tiny little keychain light kicked the butt of what used to be my primary work light! This would make for an awesome stocking stuffer.

(1) (0)
Image #1 from boodo
Image #2 from Reuben S.
  1. Devon H. (verified owner)

    This is a very small and handy flashlight. Bright enough for the casual illumination needs *AND* the red light is very handy when in movie theaters or other dark situation. THANKS!

    (0) (1)
  2. Anonymous (verified owner)

    Perfect for a truck driver. Can easily check my 5th wheel and tires brakes etc. without having to carry bigger light. Also red is great when I want to keep my night vision.

    (0) (0)
  3. Garth

    Loved it until I lost it. Fell out of my jeans small change pocket where it fit very nicely. Best when attached to a keychain, but I didn’t want to. Bright, tiny, nice build quality. Back to my trusty LD09 instead.

    The first one I got stopped working and Fenix replaced without any trouble. Maybe a very early one since I bought when it just came out.

    (0) (1)
  4. Ryan (verified owner)

    Purchase for the wife so she always has a light with her.

    (0) (0)
  5. Louis M. (verified owner)

    Just what I was looking for!

    (0) (0)
Add a review

Your email address will not be published.