Human skin powers devices using intra-body RF energy, method eliminates battery needs

Carnegie Mellon University researchers developed a "power-over-skin" technology that uses the human body to power wearable devices without batteries. The system delivers power across the body using high-frequency radio waves, enabling microcontrollers for sensing and wireless communication. This technology could lead to new wearable health sensors and devices that don't require battery changes. Researchers demonstrated the concept with prototypes like an LED earring and a temperature-sensing patch.