Body - Heat

: Modern TEGs can power small electronics like smartwatches (e.g., MATRIX PowerWatch) and fitness trackers without ever needing a battery [6, 18].

The concept of "body heat" spans from the biological marvel of human metabolism to a cutting-edge frontier in renewable energy. Humans maintain a constant internal temperature of approximately , a feat managed by the brain's hypothalamus acting as a biological thermostat [13]. Body Heat

: In Glasgow, the nightclub SWG3 uses "BODYHEAT" technology to capture the warmth from dancing partiers and store it in underground boreholes to heat the building later [10]. Future Outlook : Modern TEGs can power small electronics like