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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What does the CE logo I see on lots of products mean?

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.

What do the UL marks on so many products mean?

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?

How Batteries Work

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?