Fenix L0D Black Flashlight (5 output types) uses AAA batteries LED Flashlight lifetime LUXEON III led that gives out 30 Lumens light Five output types: 12 lumens (3.5hrs) -&gt; 4.5 lumens (8.5hrs) - &gt; 30 lumens (1hr). Uses one 1.5V AAA battery, inexpensive and widely available Waterproof to IPX-8 Standards Made of aircraft-grade aluminum; Durable Type III hard-anodized finish