Human Energy

Who would have suspected that The Matrix's machines were onto something? A person can genuinely serve as a source of energy. And fortunately for us, nobody needs to be kept in a virtual reality environment. Humans waste energy constantly, much of which can be harvested and used again if we so choose. We could be making better use of the heat and kinetic energy that we continuously waste.

In 2008, scientists created a knee brace that can use kinetic energy to power portable electronics. Basically, you could walk around while charging your phone. Traditional battery technology may be used in wearable and implantable technologies. But in the future, things would be much simpler and less expensive to maintain if such devices could be powered by motion energy, body heat, or the electrical charge generated by a human body.