This amazing adjustable beam flashlight uses a high intensity Cree 3 bulb and is one of the most energy efficient types of LED's available. The unique battery cartridge for this large flashlight is designed to use only 3 AA batteries, allowing it to be light weight and yet powerful enough to provide a strong beam of light for hours. Perfect for camping, travel, boating, home use, emergency kits, or just walking the dog. Before use, make sure to remove the plastic disk insert in the battery compartment. Buy this product and Get Free Shipping on a High Intensity Mega Cree 150 Lumens Flashlight for $21.99 at Rakuten.com, a $18 Savings!