One of the first world’s biggest is to have your phone battery go flat.

But what if there was a way to have it charged all the time? The only thing you gotta do is keep moving!

Meet Ampy, a pocket-sized device that was invented by students at Northwestern University. It uses energy that’s generated from physical activity like walking or running to charge a mobile phone. It’s strapped to the body and the magnet within a coil in the device helps convert kinetic energy into electricity. It’s half the size of most cellphones and pretty simple to use. Plug it in and charge!

“The more you move, the more power you get.,” said Chief Product Officer Alex Smith. For example, cycling or jogging for an hour will get you three additional hours worth of battery time!

Check out the video below to find out more about this inventive and cool device:



Emma Mallaburn
Emma is a writer, dancer and Lucky Charms lover. She enjoys baking muffins, completing puzzle sets and eating both. Her idea of the good life includes pretending she's Amy from The Big Bang Theory and throwing martinis in the faces of those who scorn her. She can be found on Twitter: @emallaburn