Everyday Tech

How do batteries work? How much energy is your plugged-in gadget using? How do UPC codes work? Find this out and more with Everyday Tech.

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Have you ever noticed the "CE" stamped on many 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