Fenix USB rechargeable lights provide distinct advantages over non-rechargeable lights.
Convenience– Fenix USB rechargeable lights can be conveniently charged through an external port without requiring the battery to be removed. Simply plug your USB cable into the port on the outside of the light and have a fully charged battery in a short period of time.
Reduced Cost– Using rechargeable batteries (which can often be charged over 500 times) has less cost and less waste than one-time use batteries.
More Powerful – Li-ion batteries by Fenix are much more powerful than alkaline batteries which allows your Fenix light to produce the brightness that it's designed for. With a Fenix lithium ion battery, your light will run longer and brighter.