Everyday Tech

If you're lucky enough to unwrap a sweet new iPhone or Kindle Fire this year, what are you going to do with that relic you've been using up to now?

By Julia Layton

Lithium-ion batteries are incredibly popular these days. You can find them in laptops, PDAs, cell phones and iPods. Find out why.

By Marshall Brain

You've probably used a restaurant pager, but have you taken one apart? We have -- see how it works.

By Jeff Tyson

Location tracking is one of those double-edged swords of technology. It can help find people in an emergency, but it can also make your whereabouts known to strangers. Where are these systems starting to appear?

By Kevin Bonsor

The little disposable battery testers you see on batteries or battery packages are a great example of combined technologies -- several existing technologies have been combined in a completely new way!

The "self-recharging" feature of a battery is most noticeable in a car battery. In some cases, you can crank the engine until the battery seems totally dead, then come back an hour later and crank it again.

Ever wonder why some appliance plugs have three prongs and others have only two? What does that third prong do? And what would happen if you plugged a three-pronger into a two-prong outlet with an adapter?

Have you ever noticed the CE certification logo stamped on consumer products and electronics? Find out what this logo says about the product you're buying.

A large number of electronic devices carry "UL" marks. You can find them on everything from Christmas lights to digital camcorders. What does this logo mean?

Batteries power all sorts of things — they're in our cars, our PCs, our cameras, our cell phones. How do these tiny cans of chemicals provide power for so many of our daily conveniences?

By Marshall Brain, Charles W. Bryant, Clint Pumphrey & Yara Simón