The Fenix E25 is a compact, versatile flashlight powered by two AA batteries. With the side switch on the head, you can quickly select between three brightness levels. The E25 delivers 187-lumen max output and a generous 25.5 hours of runtime in low mode. Featuring constant brightness technology and waterproof to IPX-8 Standards. The E25 is another high-performance addition to the growing Fenix line.