How much energy does an iphone use?

An iphone typically uses about 1 to 3 watts while in use, depending on the tasks being performed, such as browsing the internet or playing games. When charging, it usually draws around 5 to 20 watts, depending on the charger and the model. Over the course of a day, an average iphone might consume around 10 to 15 watt-hours of energy. This can vary based on usage patterns and settings.