Metal prongs on a type-A electrical plug. - JACKREZNOR/Shutterstock Most gadgets and small appliances in U.S. homes have either a Type A or Type B electrical plug, perhaps with a cover to hide cords.

Why do some American electrical systems use plugs with two prongs and other systems use those with three? Here's all you need ...

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 ...

Type E plugs are more commonly found in countries like France, Belgium, Poland, and the Czech Republic. These plugs have two ...

Add Yahoo as a preferred source to see more of our stories on Google. close up of Type A plug prongs - Gabriel Lopez/Shutterstock If you've ever stared at the holes in an electrical plug and wondered ...

Have you ever looked at an electrical plug and wondered what those holes in the prongs are? Hunker has all the answers to ...