Engineers achieve Wi-Fi at 10,000 times lower power

The upside of Wi-Fi is that it's everywhere - invisibly connecting laptops to printers, allowing smartphones to make calls or stream movies without cell service, and letting online gamers battle it out.

Footsteps could power mobile devices

When you're on the go and your smartphone battery is low, in the not-so-distant future, you could charge it simply by plugging it into … your shoe.

page 8 from 23