The Fenix E25 Ultimate Edition flashlight is the very first ultra-bright AA flashlight which has intelligent drive circuitry. The Cree XP-L LED makes the E25UE compatible with 14500 rechargeable Li-ion batteries allowing it to shine brighter at an amazing max of 1000 lumens. Dual side switches let you quickly choose between flashing modes or the five brightness levels. OUTPUT: --Cree XP-L V5 LED with a lifespan of 50,000 hours --Digitally-regulated output to maintain constant brightness --3 Brightness Levels (run time varies with battery types) --Turbo -14500 (ARB-L14-800): 1000 Lumens; 50 min --High -14500: 350 Lumens; 2 hr. 15 min. Ni-MH: 350 Lumens; 1 hr. 30 min. --Alkaline: 350 Lumens; 50 min. --Mid -14500: 160 Lumens; 5 hr. 5 min. -Ni-MH: 160 Lumens; 4 hr. 35 min. -Alkaline: 160 Lumens; 2 hr. 10 min. --Low -14500: 50 Lumens; 16 hr. 30 min. -Ni-MH: 50 Lumens; 13 hr. 25 min. -Alkaline: 50 Lumens; 13 hr. 10 min. --Eco -14500: 5 Lumens; 95 hr. -Ni-MH: 5 Lumens; 100 hr. -Alkaline: 5 Lumens; 90 hr. --Strobe -14500: 1000 Lumens -Ni-MH: 350 Lumens -Alkaline: 350 Lumens --SOS -14500: 160 Lumens -Ni-MH: 160 Lumens -Alkaline: 160 Lumens --Maximum beam throw: 656 feet/200 Meters SELECT SPECS: ---Size: --Length: 6.3" (161mm) --Body: 0.8" (19.6mm) --Head: 1" (25.4mm) --Weight: 3.1 oz. (87g) excluding batteries --Batteries: Two 14500 rechargeable Li-ion batteries or two AA (Ni-MH/Alkaline) batteries - included. --Included: Lanyard, Spare O-ring, AA batteries x 2 --Warranty: Flashlight Limited Lifetime Guarantee from Fenix Lighting US