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Fenix ALF-18 Battery Adapter Tube


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Are you seeking to purchase or own a high-lumen flashlight that uses a larger 21700 Li-ion rechargeable battery, but have 18650 batteries laying around the house or workshop you wish to use?  No problem!  Look no further than the Fenix ALF-18. This battery adapter makes it possible to adapt your 21700 flashlights to the batteries you prefer.  Made out of quality PC and ABS material with a copper-plated positive contact for great performance and conductivity. Use with any brand flashlight that accepts 21700 batteries.


  • Compatible with any brand / model flashlight that uses 21700 Li-ion batteries
  • Also compatible with 2-CR123 disposable batteries if needed in a pinch
  • Compatible with Fenix TK22 V2, TK22UE, HT18 and PD36R
  • Dimensions
    • Length: 2.41" (61.2mm)
    • Diameter: 0.85" (21.5mm)
    • Weight: 0.22oz. (6.1gram)


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