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

If you would like to build your very own benchtop power supply you might be interested in a DIY tutorial for Supplino. A versatile compact Arduino power supply capable of providing from 4 to 40 ...

It only applies to certain microcontrollers, but he provides example Arduino code showing how handy this can be for battery-powered projects.

Makers and hobbyists looking for a more substantial portable battery pack that they can make themselves, should check out this excellent DIY power bank created by Instructables user “tobychui ...