How Grzes recharged his mobile in Bulgaria

I used energy from sound waves to recharge my mobile in Bulgaria.

This is an invention of Korean scientists. They have created a special electrical material which transfers the sound waves into electricity. The technology will allow the mobile phones to be recharged by the noise of the conversations in the future. Many cities will be supplied with energy produced from the street traffic noise!

I used an electrical bell whose sound wave recharged the mobile’s battery.