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    Students Have Invented A Device That Charges Your Phone Through Exercise

    Going for a 30 minute jog could charge your phone for up to three hours. Why has no one invented this before?

    Ampy is a pocket-sized device which converts your movements into energy that can charge your phone. / Flo Perry / BuzzFeed

    The device works by using a magnet sliding back and forth inside a coil to convert kinetic energy (movement), into electrical energy you could use to charge your phone.

    Chief product officer Alex Smith says that you don't need to be an athlete, any movement will charge it, even whatever this lady is doing. / Flo Perry / BuzzFeed

    Alex reckons that the average person living in the city is walking enough to give their phone an extra three hours of charge a day.

    You can even attach one to your dog! / Flo Perry / BuzzFeed

    Though as they are planning on selling them for $95, this looks like it's asking for trouble.

    Ampy was invented by these three engineering students at Northwestern University.

    They hope that one day the technology in Ampy will be directly incorporated into electronic devices, making them self-charging.

    You don't have to use the charge straight away, Ampy can store up to a week's worth of movements, ready to charge your phone whenever you need it. / Flo Perry / BuzzFeed

    You can pre-order one on Kickstarter now.

    All of this means maybe in the future the dreaded 1% battery won't be so bad, you could just give your phone shake and send that text.

    New Line Cinema / Via

    Learn more about Ampy here.

    View this video on YouTube

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