What battery is used in the BC21R V3?

The Fenix BC21R V3 bike light includes one ARB-L18-2600 rechargeable 18650 battery. It is compatible with any button-top 18650 battery or two non-rechargeable CR123A batteries. Using CR123A batteries may no give the full advertised brightness and runtime. Please make sure to use a quality, branded 18650. Non-name brand batteries should not be used.

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