One man decided to change the problems a hearing impaired person goes through. There are 250 million people around the world who are hearing-impaired? Even worse, two-thirds of them live in the developing world. Odds are these people don't have the type of money needed to buy conventional hearing aids, primarily because their expensive batteries last only about a week.

Howard Weinstein, decided that he would develop a hearing aid that relies for power from the sun. He helped develop a hearing aid that's powered by the sun, eliminating the battery problem altogether. He was even able to put the very same deaf people to work. A great endeavor to pursue and accomplish.

Via - Medlaunches