Fenix E01 V2.0 AAA Flashlight

Max Lumens: 100
Modes: 3
(16 customer reviews)

$17.00 $12.95


The Fenix E01 V2.0 AAA Flashlight emits an impressive maximum 100 lumens from an included single AAA battery. Using an ultra-thin optical lens, this flashlight delivers a soft and balanced beam a max distance of 115ft (35m). Access three brightness levels with a quick twist of the head. At only 2.6” long and just over a half of an inch round, this little flashlight is built tough with an IP68 dustproof and waterproof rating. Super small and compact, this standard AAA battery flashlight is a great choice for your everyday carry needs.

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Max Lumens: 100
Modes: 3


fenix e01v2 flashlight ansi chart

E01 V2.0 Size:

Length: 2.62” (66.5mm)
Head: 0.59” (15mm)
Body: 0.55” (14mm)

E01 V2.0 Weight:

0.46 oz. (13g) excluding battery

E01 V2.0 Battery:

One included AAA battery


Pairdeer AAA battery, key chain


Limited Lifetime Guarantee from Fenix Lighting USA

Additional Features of the E01 V2.0 AAA Flashlight

  • Utilizes Cree XP-G2 S3 LED with a lifespan of 50,000 hours.
  • Included one AAA battery.
  • Ultra-compact size for everyday carry.
  • One-handed operation with the rotating switch.
  • All-metal CNC machined body.
  • Premium type HAIII hard-anodized anti-abrasive finish.

On/off for E01 V2.0 AAA Flashlight

Tighten the light head to turn on the light, unscrew the light head to turn off the light.

Output Selection

Unscrew the light head and tighten it again within one second to cycle through Low→Med→High.

Battery Specifications

Type Dimensions Nominal Voltage Usability  
Ni-MH Battery AAA 1.2V Recommended √√
Alkaline Battery AAA 1.5V Usable
Non-rechargeable Battery (Lithium) AAA 1.5V Usable
Rechargeable Battery ( Li-ion) 10440 /


3.7V Banned ×

Battery Replacement

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

Intelligent Overheat 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.

Usage and Maintenance for the E01 V2.0 AAA Flashlight

  • 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.
  • 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 light’s performance as dirty contacts may cause the light 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.

Warning for the E01 V2.0 AAA Flashlight

  • 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.

16 reviews for Fenix E01 V2.0 AAA Flashlight

  1. Anonymous (verified owner)

    perfect for key chain emergency light or night time bathroom visit

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  2. Tim Sanders (verified owner)

    Really weak flashlight but well made

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

      Well, this is a AAA powered light with levels of 5, 25 and 100 lumens, so it’s not designed to be a powerhouse in brightness.

  3. brad b. (verified owner)

    Wow – it’s nice and small and very easy to operate

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  4. mike (verified owner)

    I really like this E01 V2. If you like the E05 you’ll love this one. Better beam, better throw, better flood, smaller size and no parasitic drain.

    Waiting on blue to be available.


    4 out of 4 people found this helpful. Was this review helpful to you?
  5. Joe M. (verified owner)

    Teeny tiny

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  6. Sydney G. (verified owner)

    Very good for a general purpose night time walking-around light for around the yard. So small, there is always room in you hand to hold it, no matter what you’re doing. The low beam is sufficient for walking around the yard without stepping on your black cat. Using the “low output” setting gives much better battery life over a ‘single speed’ high-output AAA flash light. The brighter output settings are completely useful. Tie a length of cord to the E01 V2.0 for easy retrieval from your back pocket. I bought three and am glad I did. I use these lights after dusk. (As a daytime task light, I use a ‘single speed’ high output light for walking into an out-building from bright daylight, for example.) However, any lights of this type will not function well as a keychain light because they will unscrew and drop the battery and LED. They can also be momentarily turned-on by bending them, as they would be if kept with keys in a front blue jean pocket. They are best used while secured, by themselves, to a length of cord for easy retrieval from your back pocket. Definitely worth the price.

    1 out of 1 people found this helpful. Was this review helpful to you?
  7. Skyler B. (verified owner)

    Nice small light for my keychain, with an actual usable amount of light.

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  8. Thomas Williams (verified owner)

    Handy little flashlight.

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  9. Truman (verified owner)

    Received Fenix E01 V2 09AUG2020.

    Haven’t checked runtimes. Changed disposable AAA battery out for eneloop AAA rechargeable.

    1.) beam profile: wide hot spot/ peripheral spill that distributes light evenly across with 0 artifacts.

    2.) Twist interface: retains position relative to the users intended use/ ie tightness/ retention is adequate and will not loosen up over time. (Olight i3S) (Armytek predator pro etc) Lockout is possible with the amount of threading left.

    3.) Brightness/ general use: this is not a “distance Illuminator” by any means. This is a PERFECT and QUALITY general use light from my experience as a flashlight collector.

    4.) Mode spacing/ UI: LOW, MED, HI. Perfect. No strobe, complication or extra programming which inhibits the EASE of USE of an edc light.

    I have a FENIX PD36R Set to turbo while this light sits next to my pocket knife.

    4 out 5 stars because I haven’t confirmed real world runtime tests.

    2 out of 2 people found this helpful. Was this review helpful to you?
  10. Fred Noack (verified owner)

    The light is small and fits on my key chain. Since it is there I have used it several times without problems.

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  11. John E. (verified owner)

    Very bright for it’s small size. Very useful. Fit easily in your pocket. Great gift

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  12. Bo (verified owner)

    Nice and compact for EDC with decent battery life.

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  13. Art P. (verified owner)

    Very Nice Keychain Light Also

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  14. Daniel (verified owner)

    Great keychain light.

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  15. Paul Bourbeau (verified owner)

    Good flash light. Would have liked an option for a beam as well as diffused light.

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  16. John Vasilakis (verified owner)

    Another great offering from Fenix. The E01 V2.0 is a great little keychain light. It’s plenty bright for an emergency back-up light, and small enough to fit on your keychain. The best of both worlds!

    Uploaded image(s):

    Image #1 from John Vasilakis
    4 out of 4 people found this helpful. Was this review helpful to you?
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