Beyond the Datasheet: Why Real-World ESP32 Circuits Drain Batteries Faster

ESP32's theoretical 10μA deep sleep spec ignores real-world peripheral components—voltage regulators, USB chips, and pull-up resistors—that collectively consume 10-100x more power. Understanding and eliminating these hidden power drains is critical for anyone building battery-powered IoT and sensor projects. This fundamental gap between datasheet promises and actual circuit behavior is the difference between months of operation and mere days.