Mechanically-powered flashlights — be they shake, crank or squeeze varieties — are one of those must-have items for every emergency kit. When a tornado knocks out power, or the Big One hits, it’s nice ...

We know that you can transform the mechanical motions of your body into electrical energy, like when you turn the crank or shake a mechanically-powered flashlight. These types of mechanical motions ...

Flashlights have been essentially used as a light source in homes, offices, job sites, watercraft and other outdoor activities. From a battery operated to mechanically powered flashlight, another ...