According to this link you can charge your cellphone when you are running. There is this company that has introduced a charger that gives you a one-hour charge for walking for six hours. This may seem like a lot of effort for a charge of just one hour but it is a great way of charging your cellphone when there is no electricity around and you have to walk a lot. This device can be especially useful in rural India where people have to walk for long miles even to fetch water. But you may ask do such people have cellphones? Maybe not.
The technology will be more beneficial if such energy can be derived from other movements too (no, I knew you would think like that, but I’m not talking about bowel movement), for instance cycling, swings in the park, walking cattle, newsreaders, and all those movements that are prolonged and consistent. With millions of cellphones in circulation just imagine how much electricity can be saved by such motion based charging.
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