There are available examples of technology that can convert body heat into electricity. The technology is made to where thermoelectric generators are used to harvesting electricity from body heat. This can be seen as an amazing finding for possibly powering nanotechnology that is small in size and weight, due to the lack in need of batteries and other bulky components. This could possibly be incorporated with a compatible heart rate monitor or blood sugar monitor for patients to easily access. The thermoelectric generators, only 2 millimeters in thickness, generates electricity by using the temperature differential that is found between the air surrounding the body and the body itself. Understanding this, this technology would be difficult to work with for technology that would be implanted within the body, but could be altered to fit the different environment.