Energy harvesting technique to enable continuous and wireless power supply of over 100 μW to wearable devices

Although wearable devices, including electronic textiles, smart textiles, smart shoes, and smart insoles, have attracted significant attention in recent decades, supplying sufficient wireless power that is stable and continuous to these devices remains a challenge. In this study, an energy harvesting technique that enables continuous and wireless power supply of over 100 μW is demonstrated, employing a charging smartphone and conductive fabric in contact with or independent of the human body. This technique paves the way for continuous and wireless power supply to wearable devices by simply requiring that the person wearing the device hold a charging smartphone.