A wearable power generating device is provided. The wearable power generating device includes an arcuate-shaped flexible substrate, a first energy generating device, an energy harvesting circuit, and an energy storage device. The first energy generating device generates a first voltage in response to the first energy generating device being in tension or compression or being bent. The energy harvesting circuit receives the first voltage and outputs a DC voltage in response to receiving the first voltage. The energy storage device is electrically coupled to the energy harvesting circuit and receives the DC voltage.