Self-sustaining Flashlight

For the drawing, I chose a flashlight that doesn’t take any batteries to run, but instead runs off of the heat from a person’s hand or from shaking the flashlight. The flashlight will have a small engine in the middle of it that the person envelops their hand around that will store the kinetic or heat energy that the person conducts. As a flashlight is one of the emergency tools included in everyone’s household, I think it’s an important tool for everyone to have that will work in emergencies without any form of energy other than the person’s hand or shaking the flashlight.