It may sound like weird science, but "energy density" is nothing more than the calories in a portion of food. Fruits, vegetables, legumes, and cooked grains are examples of low-energy-density ...

Consider this example: The first working transistor ... this enables the fabrication of all-graphene batteries with ultrahigh energy density. Nanotechnology in Furniture (click to read more) In the ...

Check out how high power density enhances the efficiency of energy-harvesting wearables and novel wireless-power-transfer systems.