The Internet of things (IoT) is undergoing an explosive growth. In the future, intelligence will be embedded into all things in our living environment. The sparsely spatial distribution of IoT devices has raised new issues for the power supply and power management technologies. The ambient energy harvesting and wireless power transfer are two most promising technologies for enabling the everlasting operation of the IoT devices. The METAL group has work on the kinetic energy harvesting technology during the last decade. New power conditioning solutions were proposed for enhancing the energy harvesting capably. We will continues devoting ourselves to the research on more reliable and efficient power solutions for the coming IoT era!