The Dory 41-2079 floating flex battery lantern offers many new features and ideal for use in a variety of applications. With durable construction and a sealed on/off switch This lantern produces 100 lumens of light, 8 hour run time and a 105 meter beam distance. The anti-roll design along with a large handle space is make this light design The top in its class. With Dory's flex battery system This light can be powered using 4 AA (Included) or 6V spring top battery (not included).