HandEnergy: a charger that uses energy from a human body!


Thanks to this invention, our gadgets now can be charged up with a simple arm twist. Estonian Michael Vaga (19) designed a charger named HandEnergy which very usefully uses your body energy to charge your smartphone, camera, flashlight or any other gadget you may have.

The charging device operates very simply. It has a gyroscope built into it and when you start moving your hand that gyroscope activates and starts producing electric energy which can be stored in the devices built-in battery or charge the smartphone or any other gadget instantly. This project has been submitted to Kickstarter by Michael, and it has already gathered more than $74,876 which is way more than $52,730 which were planned initially. Thanks to this and all of his backers, Michael will be able to start manufacturing his HandEnergy and release it to the market, where all of us will be able to buy it starting March this year for a price of $105.


Vaga even stated that “With each rotation of the arm the speed of the rotor increases and produces more energy. The average rotor speed is 5.000 rpm, and that mechanical energy is converted into electrical.” He also added that this is a good source of energy when you have an emergency of that kind.

He needed nearly a year to develop the HandEnergy, and the ideal users of such device are those who are often on the road or just simply away from a power source, like campers or mountain climbers. To completely charge up the internal device’s battery you need to move the HandEnergy around for 40 minutes to an hour, and if you are charging your phone at the same time, the device is around 30% slower.

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Miloš Kalajdžić
My name is Miloš Kalajdžić and I come from Brčko DC in Bosnia. I was born on July 20 th 1988 and so far I obtained a BSc in economics and one year of working experience in my field of study. I am a very hard-working person who leaves nothing unfinished and halfway done. When I commit to something I give my best to make sure that everything is done the way as it is supposed to be. I like cars and everything that comes with them. My passion are American muscle cars, but unfortunately the closest I managed to come near one is behind my laptop watching an image of the new Chevy or Dodge and writing about it. But that’s ok I’m still optimistic. When I’m not behind the laptop writing I’m on the streets and auto shows admiring all stuff rolling on four wheels being propelled by a petrol engine!