The Internet of Things (IoT) offers great potential to monitor and manage complex systems, yet remains hindered by excessive use, size, and replacement of batteries in IoT nodes. Decreasing power use is essential to fulfil the IoT promise for smart, sustainable, and green societies. We have developed a unique Intelligent Power-Management Integrated Circuit (IPMIC) using silicon-proven subthreshold technology that can autonomously manage any sensor, microcontroller, wireless chip, or peripheral to reduce energy consumption by ~50-99%. This grants novel capabilities to all designers of battery-powered devices to optimize for increased performance and reduced product size/cost, while eliminating replacement cost/operational barriers for new applications in critical parts of the value chain and environmental impacts of disposal. With EIC support, Nanopower will address the IoT battery bottleneck and become a Europe-based, world-leading ultra-low-power specialist.