The Fenix ALF-18 holder acts as an adapter, allowing an 18650 battery to be used in flashlights powered by a 21700 battery. It accepts 18650 batteries with either a button-top or flat-top positive terminal.
- Type: Battery adapter
- Compatibility: Fenix HT18, TK22 V2.0, TK22 UE, PD36R, TK16 V2.0
- Material: PC and ABS plastic
- Positive terminal contact: Copper-coated
- Length: 21.5 cm
- Weight: 6 g
- Certification: CE