As time goes by, sustainable energy generators are getting smaller and smaller. This energy generator is so small and sensitive that it starts gathering up energy with little to no effort on the part of the user.
The generator uses a system called triboelectric energy that can be brought about by even gentle movements like wind or flowing water. It does this by producing static from a spinning wheel on the device. The static electricity is similar to the energy created when a person rubs their feet on carpet and gets shocked or when somebody rubs a balloon on their head.
Using such a simple concept and having it operate under such loose circumstances guarantees that there will always be power in the energy generator to use.