Options to power the Arduino Nano include USB, VIN, ... You can use a 6V to 20V unregulated external power supply, but the recommended range for the Nano is between seven and 12 volts only.

Other than the USB port, there are other ways to power the Arduino Nano. You can use an unregulated external power supply with a rating between 6 and 20 volts, and connect it to the Nano's VIN pin ...

The Arduino Nano 33 IOT has an ESP32 onboard (WiFi + Bluetooth) and crypto onboard with the uBlox NINA-W10. I guess the BLE versions dissipate less power than the ESP32/uBlox NINA-W10 version ...