Esp32 from AA/AAA batteries - 3 or 4 needed? : r/esp32

ESP32 Development Board WiFi+Bluetooth Ultra-Low Power Consumption Dual Core ESP-32S ESP32-WROOM-32D/32U ESP 32 Expansion board - AliExpress

Official Original Nano For Arduino ESP32 Development Board For Arduino Nano ESP32 ABX00092 - AliExpress

M5Stack Base AAA Battery Holder

Esp32 from AA/AAA batteries - 3 or 4 needed? : r/esp32

Using Servo Motors with the ESP32

What is the best Battery for the ESP32

STM32: internal RTC, clock and battery backup (VBAT) – Renzo Mischianti

M5Stack Base AAA Battery Holder

MH-ET ESP32 Minikit

Can anyone tell me why this project uses 3 AA batteries at its power supply, it has a ESP32 and 5V relay : r/ArduinoProjects