Your ESP32 pulls 240 milliamps in active mode - a coin cell dies in hours.

Added: 2026-05-25

[00:00:00]Same coin cell battery. Active mode dies in 6 hours. Light sleep stretches it to 7 days. Deep [music] sleep? 6 years.

[00:00:09]Same hardware, 8,000 times longer.

[00:00:13]>> [music] >> Your ESP32 in active mode draws 240 milliamps >> [music] >> constantly. A small battery dies in 4 hours, but your app is idle 99% of the time.

[00:00:25]Light sleep pauses the CPU but keeps RAM and the radio alive. 0.8 milliamps.

[00:00:30][music] Wakes in 7 microseconds. Perfect for sensor reads every few seconds.

[00:00:36]>> [music] >> Deep sleep shuts almost everything down.

[00:00:39]Just the RTC stays awake. 10 microamps.

[00:00:42]>> [music] >> Wakes in 100 milliseconds. Full reboot.

[00:00:45]Perfect for hourly or daily check-ins.

[00:00:48]Pick your trade-off. [music] Speed or years? Follow for the next one.