Charge Your Phone While Working Out

Three engineering students from Northwestern University are on their way to become millionaires. These guys created a device that actually uses your body's movements to charge your phone.

That means you can charge you phone while you are running on the treadmill, bouncing your leg at your desk or even walking through the mall. The brilliant invention is called Ampy, and it uses a magnet to convert your movement into energy that charges your phone. The coolest thing is you can store the charge for a week in your Ampy and plug your phone in at any time for an emergency charge.