There is a new material that has been created by a team of researchers that is based in Texas, that can use the audio signal that uses your voice to create electricity to power a cell phone on or off. According to this team, this piezoelectric material can increase the energy production of that material by 100 percent. This unique technology could be applied to not only cell phones, but to other low-powered electronics. This will allow these devices to operate without having to use the batter.
via: Phone Scoop