Fenix ALF-18 Battery Adapter
$5.95
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Want to use your rechargeable 18650 batteries in your 21700 flashlights? No problem, with the ALF-18 Battery holder. Slide your 18650 battery inside the ALF-18 battery holder sleeve, and your battery will now be the size of a 21700, so you can use it quickly and effortlessly in your flashlight.
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