Fenix Compact LED Flashlight The perfect backup light in your car, backpack , pocket or purse 10 Lumens of constant brightness and 21 hour run time using just one 1.5V AAA ( Alkaline, Ni-MH, Lithium ) battery Unbelievable 3 ounce body design is made of durable aircraft-grade aluminum Waterproof to IPX-8 Standard, type III hard-anodized anti-abrasive finish Virtually indestructible, microprocessor-controlled, CREE light emitting diode (LED) has no filament to burn out or break Provides a constant brightness of 10 lumens