Lights.com—Kinetic Flashlights
Kinetic flashlights use energy to create light. They do not operate on batteries. The flashlight itself operates as an electric generator.
How Kinetic Flashlights Work
Kinetic flashlights create energy to produce light. This operation enables the flashlight to operate without using an outside source of power, such as batteries. These flashlights use a magnetic field as the force to create power. They then use that electricity to power the flashlight.
The benefit of kinetic flashlights is that you do not have to worry about a dead battery. A kinetic flashlight can sit in your glove compartment for years and always be ready for an emergency. The bulbs in kinetic flashlights do not need to be replaced, either.
There are, however, some drawbacks to the use of kinetic electricity. The electricity has to be created. Some flashlights create this electricity when the user shakes them for a short period of time. Some flashlights require pumping a handle. Though the light that shines can be a bright light, it may not be as powerful as some other flashlights. Also, as the energy created by the magnetic field wanes, you will be required to create additional energy. Some flashlights will only last five minutes or so. It may be difficult to keep shaking your flashlight if you are in an emergency.