This paper describes charging of mobile phones by making use of sound. Basically here the sound energy is converted into electrical energy; the main principle involved in this project is piezoelectric effect which is the conversion of mechanical force or stress into electrical energy. The Zinc Oxide strands are interceded between two electrodes in this system. The sound absorption pad is placed upon the interceded zinc oxide electrodes. When the generated mechanical waves in the form of sound waves strike the sound absorption pad, vibration occurs. This results in the flexing of the zinc oxide wires. The compressions and rare fractions are due to the sensitivity of the Zno. A nano generator is placed between the sandwiched zinc oxide electrodes. The compressions and rare fractions are given to the nano generator. The nanogenerator converts the given mechanical energy into electrical energy. The generated electrical energy is used to charge the battery.