Explore the challenges and solutions for designing ultra-low-power IoT sensors in this 46-minute conference talk from linux.conf.au. Dive into the intricacies of battery-powered environmental monitoring, covering topics such as battery selection, power-efficient components, and deep-sleep modes. Learn about the limitations of LoRa radio platforms and the practicalities of solar power integration. Gain insights from a real-world case study on IoT utility metering, examining the complexities of modern IoT processors' ultra-low-power subsystems. Discover how to create devices that can operate for years between charges, addressing common pitfalls in wireless IoT implementations.