Textbook in PDF format Battery-free sensor networks emerge as a pivotal technology for enabling sustainable, next-generation Internet of Things (IoT) connectivity. These networks leverage energy harvesting techniques, such as solar, thermal, or radiofrequency (RF) energy, to power sensors and devices, eliminating the need for traditional batteries. This reduces the environmental impact of battery disposal while extending the operational lifetime of IoT devices, making them more reliable and cost-effective. By harnessing energy sources, battery-free sensor networks hold the potential to revolutionize applications in smart cities, industrial monitoring, healthcare, and agriculture, contributing to the development of energy-efficient, self-sustaining IoT systems. Battery-Free Sensor Networks for Sustainable Next-Generation IoT Connectivity explores contemporary developments in battery-free sensor networks and their pivotal role in advancing sustainable connectivity within the next-generation IoT landscape. It delves into the latest advancements, challenges, and applications of battery-free sensor technologies, offering insights into their design principles, energy harvesting techniques, communication protocols, and deployment strategies. This book covers topics such as healthcare monitoring, sensor technology, and sustainability, and is a useful resource for engineers, scientists, environmentalists, business owners, academicians, researchers, and security professionals