-Elegant in design, this is the best no battery required flashlight in the world! All the power is coming from the hand cranking action. The hand shake flashlight can generate 30 to 50 MAH and the squeeze flashlight can generate only 60 - 80 MAH. This generator is 20 times more efficient in charging. - Water resistant .3 x LED Dynamo flashlight lasts 30 minutes on 1 minute cranking. Our new Xtreme-023 hand-crank flashlight is ready-to-use any time, anywhere. Great for any emergency! - 3 super bright 15,000 MCD (most other LEDs are 3,000 to 5,000 MCD). This flashlight is brighter than most full size Maglite Flashlights (20 lumins). The brightness is equivalent to about 20 regular ultra-bright LEDs.