Fenix Flashlights E01, Olive Max 13 lumen output from a single AAA battery A perfect backup light for car, backpack, pocket or purse 16 hour 30 minutes run time using just one 1.5V AAA battery (battery included) 1 ounce body made with aircraft-grade aluminum for long durability IPX-8 Waterproof, 2 meters for 30 minutes