ALF-18 Battery Holder

(21 customer reviews)

$7.00 $5.95

SKU: ALF-18 Categories: ,

The ALF-18 battery holder allows you to use an 18650 battery in flashlights that are built to use a 21700 battery. Simply insert your 18650 battery into the holder and place both into your 21700 capable flashlight. Made with copper plated contact, providing excellent conductivity performance. Compatible with button top as well as flat top 18650 batteries.

Compatible with:
HT18, TK22 V2.0, TK22 UE, PD36R

This will not work for the E35 V3.0 or PD40R V2.0

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.


Specifications of the ALF-18 Battery Holder

Length: 2.4″ (61.2mm)
Diameter: 0.85″ (21.5mm)

Weight: 0.2 oz. (6.1g)

PC- ABS materials
Copper plated positive contact

Compatible with:
HT18, TK22 V2.0, TK22 UE, PD36R

This will not work for the E35 V3.0 or PD40R V2.0

21 reviews for ALF-18 Battery Holder

  1. Brad (verified owner)


  2. Gary J. M. (verified owner)

    This allows me to use one of other flashlight batteries in my newest flashlight, in a pinch.

  3. MARC L FELDMAN PHD (verified owner)

    I purchased these for a friend who lives in Alaska. He told me that there were ALF- 18 Batteries. All I can say is that it was not a present, but he told me that he plans to now buy updated Fenix Flashlights.

  4. David R. (verified owner)

    It’s great! Let’s me adapt CR123A’s and smaller rechargeables in my PD36R if needed.

  5. Michael S. (verified owner)

    Works well, in 21700 devices, when you only have 18650 batteries. Obviously runtime won’t be equal. So don’t expect your 18650 to run your device as long as a 21700 battery.

  6. Nathan (verified owner)

    Works as advertised.

  7. Wenbin Z. (verified owner)

    High quality

  8. Ricardo (verified owner)

    It works and it looks of decent quality.

  9. Anthony Q. (verified owner)

    Handy to have if you’ve had older style flashlights that take18650

  10. Anonymous (verified owner)

    My one month review of the Fenix ALF-18 battery holder. It’s made out of very thin ABS plastic, so it feels cheap and fragile. I would recommend storing it in the easy-open clamshell packaging that it comes in or something similar to prevent crushing. The copper-plated positive contact is securely molded in place and has a spring on the inside. I have personally tested both regular and protected button-topped 18650 Li-Ion rechargeable batteries with this product in my Fenix PD36R 21700 capable flashlight.

  11. Robert (verified owner)

    Have not tried yet but feels and looks like quality product.

  12. Brian (verified owner)

    Awesome , clever idea.

  13. Anthony Bautista (verified owner)

    Fit is perfect. Works well.

  14. George Helser (verified owner)

    Works great!

  15. Daryl T. (verified owner)


  16. Robert (verified owner)

    Holds the battery well.

  17. CATALIN C. (verified owner)

    Looks good built. Bought just in case.

  18. steve M. (verified owner)

    Great execution, to allow the use of other Fenix batteries.

  19. Paul B. (verified owner)

    Super handy for using 18650 batteries (especially the Cold-Resistant ARB-L18-2900L) in my 21700-type flashlights (PD40R V2.0 and PD36R)

  20. Joseph Fincannon (verified owner)

    Works as promised

  21. Justin Johnson

    This battery holder also comes with the Fenix HT18 flashlight. It works perfectly anytime I need to use an 18650 battery in place of a 21700. Fenix used super high-quality materials in this battery holder. You can toss it in a hunting bag or emergency kit bag and not worry about it losing its shape. It’s built tough. At this price, I’m going to pick up a couple to toss in multiple bags and in our cars as back-ups.

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