Two-pronged devices are commonly used for smaller gadgets like phone chargers while larger appliances typically come with a three-pronged cable.

Smart plugs can help track energy use, but they also consume some power themselves. Knowing the standby draw helps you plan better.

Plugs where one blade is wider than the other can be annoying, but they'll also keep you a lot safer. Here's why they're like that and how it works.

It is the bane of worldwide travel: there isn’t just one way to get AC power from the wall. The exact connector — and what you can expect when you plug in — differs from country to country. Even if ...