Charge your phone using Solar Charger with the power of sun. Solar Charger uses the phone's light sensor to charge battery. Just a few minutes in the light and you will see your battery level increasing. 
Better than other solar charging apps in the market.
Simply start the app put it in the sun and watches as it regenerates your smart phones battery. If you cover the solar panel with your hand in the evening, then the charging will not start. Tell your friends about this application and prank them.
Note: Charging phone through solar light is not possible. Please do not expose your phone to sunlight as it may damage it. This application is a prank and developed for fun and entertainment purpose only.

Source: https://play.google.com/store/apps/details?id=com.solar.charger.batterycharger