Fenix E01 V2.0 AAA Flashlight

Max Lumens: 100
Modes: 3
Battery: AAA
(46 customer reviews)



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.

46 reviews for Fenix E01 V2.0 AAA Flashlight

Based on 46 reviews

Customer Images

Image #1 from John Vasilakis
Image #1 from John Vasilakis

John Vasilakis

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!

7 out of 7 people found this helpful. Was this review helpful to you?
Image #1 from John Vasilakis
  1. Richard Roberts (verified owner)

    Small, bright, well made. What is not to like? Did I mention an excellent value (bang for the buck)?

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  2. Anonymous (verified owner)

    It was time to replace our trusted original E01 and so my wife and I got us the V2.0. The new model is even smaller than the original, and the change of brightness is genius. The light has a permanent place on my car key ring; the original has served us well during road side emergencies, home inspections (looking up a flue or into a dark crawl space is a breeze), camping and everywhere you need a light. Cannot go wrong with this light.

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  3. Michael L. (verified owner)

    Great very small flashlights. Three levels of light. Very pleased. Best “pen lights” I’ve ever seen.

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  4. Chris H. (verified owner)

    Overall great keychain light, nice to have different brightness levels, but unfortunate that it can’t tail stand for use like a candle (the original E01 could tail stand).

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  5. Cris (verified owner)

    Liked order model better

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