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Fenix ARB-L2S 3400 mAh 18650 Battery

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Calculated at checkout

Product Description


Fenix's newest 18650 delivers a 33.7% increase in runtime!  Why settle for less when you can have more?

One battery per package

This new 18650 battery is specifically designed for high-drain devices.



  • 3400 mAh high-capacity battery with outstanding performance
  • Three sets of over-heat protection
  • Built-in over charge and over discharge protection circuit ensure the max performance of the battery
  • Unique structural design for better impact resistance
  • 37.5% increase in runtime in the TK75 in high mode (test comparing runtime in the Fenix ARB-L2 2600 mAh battery and the ARB-L2S 3400 mAh battery)
  • 500 Charge Cycles (A properly maintained ARB-L2S battery is designed to retain up to 70% of its original capacity at 500 full charge and discharge cycles)
  • Built-in over charge and over discharge protection circuit to ensure the maximum performance of the battery
  • Compact design, suitable for various high-intensity flashlights
  • No battery memory effect, negligible self-discharge


Technical Parameters:

  • Model ARB-L2S
  • Capacity:  3400 mAh
  • Voltage: 3.6V
  • Charging Current: Recommended 1A, maximum 2A
  • Weight: 49g
  • Size:  Diameter 18.5mm, Height 68 mm
  • Warranty Period:  12-month free warranty period from purchase date


Battery Handling:

  • Do not expose the battery to heart or throw it into water
  • Observe the plus (+) and minue (-) marks on the battery and ensure correct use
  • After extended periods of storage, it may be necessary to charge the battery to obtain maximum performance every three months
  • Keep the battery out of the reach of children.  Seek medical advice immediately if the battery has been swallowed

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Product Reviews

  1. 18650 3400 mAh

    Posted by Drizzt on 14th Mar 2014

    I use my PD-35 flashlight every night on the jobsite. I switched to these batteries after a couple months of buying the CR123's. The 18650's last way longer and throws a brighter beam from my light. The rechargeable part is the best aspect, at approx. $15:00 for two CR123's, it a bit pricey to have the brightest light on the job.
    Now I just grab one of these out of my ARE-C2 charger and I'm good to go for the night. Everyone always asks "What kind of light is that?" and " Where can I get one?"

  2. wrote a nice review that never got posted

    Posted by chris on 13th Feb 2014

    didn t get posted


    Posted by John Pombrio on 23rd Jan 2014

    i REALLY expected a Panasonic battery in these considering the price. Unfortunately, there is no mention of either the manufacturer or the contents on the website. When i received the batteries, I was unpleasantly surprised to find the Chinese manufacturer on the packaging as well as Made in China. I will try one of the batteries for a while but I plan to return them and get genuine protected Pany batteries for less cost.