Mobile Charge,s From Sound

When a person is using cell phone and if battery get,s low so what happen,s but now it,s not a problem because
A South Korean Scientists find new technology that allows user to charge there cell phone from loud voice.

It works also with all background noise, so the phone doesn’t actually have to be in use. The louder the noise the quicker the charge.

Now no need of this

Now no need of this Because now just talk and Charge