Fenix Battery Adapter For 18650 Converted To 21700

Fenix 18650 to 21700 battery adapter – a super simple and smart adapter that allows your 18650 battery to fit equipment designed for 21700!

Use your old 18650 batteries

The 18650 is the most common Li-Ion battery on the market, and many people have a good supply. But newer flashlights increasingly require the larger 21700 format. So what do you do with all those perfectly functional 18650 batteries?

You use an adapter, of course! With the Fenix ALF-18, the battery fits perfectly, and you can have a bunch of older batteries as backup – really smart and good for the environment!

Fenix 18650 Battery Adapter - Quality Materials and Wide Compatibility

Made of durable polycarbonate ABS plastic with a copper-plated contact at the top for extra good conductivity. Suitable for both button-top and flat-top batteries.