Charge your phone using Solar Charger Free via the screen with the power of sun. There is enough light, you can reach voltages of up to 3.6 volts. Simply start the app, put it in the sun and watch as it regenerates your smartphones battery.To protect your phone, never put it for a long time to the direct sunlight, because the high temperatures can damage it.Featurerequests and bugreports are handled with high priority, just send an email, I will answer as soon as possible. You can write me in German and English