Fenix ARB-L18-3400 Rechargeable 18650 Battery

(19 customer reviews)
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The Fenix ARB-L18-3400 is a high capacity 18650 Li-ion rechargeable with a protection circuit in the anode to help prevent short circuits, over charge/discharge and over heating. The battery also includes pressure relief vents which expel waste gas in the rare case of an internal short circuit preventing an explosion.

SKU: ARB-L18-3400 Categories: , ,
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  • ARB-L18-3400 Rechargeable Battery
  • 3400mAh high capacity
  • Protection circuitry to prevent short circuits
  • Pressure vents to prevent explosions
  • 500 charge cycles
  • Voltage: 3.6V
  • Charging Current: Recommended 1A, maximum 2A
  • Weight: 1.8 ounces (50g)
  • Size: Length: 2.7″ (69mm) Diameter: 0.7″ (18.6mm)
  • Warranty Period: 12 month from date of purchase

19 reviews for Fenix ARB-L18-3400 Rechargeable 18650 Battery

  1. Mike (verified owner)

    Lasts a long time on one charge

  2. Richard Peabody (verified owner)

    Batteries were shipped super fast and have performed beyond expectations.

  3. Thomas K. (verified owner)

    5star Flashlight/Battery Life. Hearty/
    Reliable. Bought mine after a 25
    Year Use Of a customer at the sales
    Counter who’s testimony told me Fenix is the best. I did buy Two and
    So happy I did.

  4. Bryan P. (verified owner)

    These batteries last a while and recharge fast.

  5. Donald MCSHAN (verified owner)

    It’s a good battery

  6. Anonymous (verified owner)

    Have only had the battery for a short period of time but it seems to be holding up as expected.

  7. Mark Fassio (verified owner)

    The battery work but when I turn it on bright it gets dimmer and dimmer like I was using the button but I’m not.

    • Dianne

      I will have someone from warranty contact you

  8. Seth (verified owner)

    Love that I can use the same battery for a long freaking time!

  9. Anonymous (verified owner)

    The batteries are excellent just like the previous ones.

  10. john p. (verified owner)

    does what I want

  11. Robert G. (verified owner)

    I needed a replacement battery for my TK20R and a rechargeable battery for my TK16. Now with the single port charger and 2 batteries I should never be without a good light.

  12. ERIC (verified owner)

    Run time is great

  13. Mathew A. (verified owner)

    Much better than cr123s. Holds a charge for a long time.

  14. Anonymous (verified owner)

    My favorite 18650

  15. ernest (verified owner)


  16. William (verified owner)

    The Fenix ARB=L18-3400 is a great battery. Be careful of counterfeits sold elsewhere for the same or less money. The counterfeits fail early. I will only buy these batteries from Fenix.

  17. Carlos Gomez (verified owner)

    The best battery out there

  18. Rose B. (verified owner)

    These batteries are great. I always like to have extras, just in case. And these work great.

  19. Kenneth B. (verified owner)

    Great bstteries. Last a good work time

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