The Fenix E18R is rechargeable via an included magnetic charging cable. The oxidation-resistant aluminum body and the ultra-thin optical lens are built to withstand every-day use as well as the harshest elements. The E18R operates with two battery sources: the recommended rechargeable 16340 battery or a CR123A battery as a backup source or a source when in below-freezing temperatures. Lumen output Turbo 750 lumens, high 150 lumens, medium 30 lumens, low 5 lumens. Features magnetic charging in the neck, lockout function, battery-level indicator, automobile-type optical lens coating process, side switch for one-switch operation and magnetic tail. Includes One Fenix ARB-L16 Rechargeable 16340 battery, lanyard, pocket clip and spare O-ring.