Options to power the Arduino Nano include USB, VIN, and 5 volt pin, meaning you have power options for almost any situation.

The nano sensor interface presented below is a microcontroller-based universal sensor interface with a power-saver mechanism. The idea, centered around an Arduino Nano (v3) microcontroller, was ...

The new Arduino Nano designs bring a lot of power to a small footprint. I have to wonder if Arduino is looking to compete with ESP32 modules.