To use it as such, you need a USB cable and a 5V power source. In the case of the Arduino Nano, a mini-B USB cable is required. The power source, on the other hand, can be a powerbank, a phone ...

Arduino has also swapped out the Nano's mini-USB connector in favor of micro ... adopted USB-C for chargers — you might have micro-USB cables lying around the home from old phone chargers ...

It lacks only a DC power jack, and works with a Mini-B USB cable instead of a standard one. “ Specifications of the Arduino Nano development board which is available to purchase for just €20 ...