When the power went out at his parents’ shop and ruined the contents of their fridge, [Lauters Mehdi] got to work building a custom power failure alert system to prevent future disasters.

Using an Arduino Nano board together with a 2.2 inch UART HMI display the batteries can provide up to 60w of power output.

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