Learn how to accurately measure and calculate board runtime for a single battery charge using an ESP32 as an example in this comprehensive video tutorial. Discover simple tips and tricks to increase battery runtime through correct current measurements. Explore power consumption of the ESP32 board in various modes including deep sleep, WiFi, and normal operation. Gain insights into setting up power profilers, calculating battery life for real-life applications with LDO and BUCK/BOOST converters, and optimizing software to reduce power consumption. Master techniques such as using GPIO for measurements and employing coulombs for calculations. Perfect for IoT developers and hardware engineers looking to maximize battery efficiency in their projects.