Few people out there who think they might waste their time when they do exercise even it’s good for health. They don’t have to think like that after hold this device in their hand. You might have already read about Body energy can charge the devices in techkumar.org

All you have to do is Jumping. The device named ERope would charge the pair of AA batteries in each handle. It has a LED indicator to show charging status.

As most of the people need some rest after 20 mins since they jumped continuously this device also takes 20 mins to charge 4  AA batteries.