Can I use a Fenix 16340 battery in my older Fenix E15 that was released before 2016?
No, only the 2016 edition Fenix E15 can accept 16340 batteries. Editions older than 2016 are not able to use 16340 batteries.
We do have many flashlights that are compatible with 16340 batteries including the Fenix E18R V2 EDC flashlight.
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