The Dynamo Powered LED Flashlight is a tool that makes very efficient use of Kinetic energy. With 1 minute of cranking it provides 10 minutes of light. This light is an excellent solution for extended power outages and situations where the light will be stored for a long period of time. It never runs out of power and can store hours of energy for lighting purposes. It is a very useful tool for technicians and is also very inexpensive.