How to detect when laptop power cable has been disconnected?

Question

For the umpteenth time my laptop just shut down in the middle of my game because my power cable had disconnected without me noticing it.

Now I want to write a little

Answer 1

SystemEvents.PowerModeChanged. You will need to use either GetSystemPowerStatus (see link in one of the answers) or SystemInformation.PowerStatus (link is in another answer) in the handler to check what happened.