You find yourself in an airport or hotel room in another country, and you really need to charge your phone, camera or game system. But what is that strange-looking outlet? It has round holes! And ...

Not all outlet holes are the same, and there's a reason for that. The shapes (vertical slots, round holes, T-slots, etc.) correspond to specific electrical functions and safety features. Take the ...

You know the struggle: You go to plug something in, but the orientation's wrong. The prongs are different sizes, so you turn it the other way and try again. Still wrong. You finally get it, third time ...

If you've ever looked closely at an electrical plug, you've likely noticed that the ends of the prongs have little holes in them. While this is a leftover design element from early electrical systems, ...

John Carlsen has more than a decade of experience testing and reviewing home tech products, with a major focus on smart home security. He earned his BS in journalism from Utah Valley University. In ...

Meltric is a manufacturer of industrial plugs and receptacles, alongside third-party components. The company's whole focus is on creating electrical plugs and receptacles for them to go into. They ...