Most people are aware that their phone emits radiation, but many don't know that the battery is actually the main source of this radiation. The battery produces a small amount of electromagnetic radiation which is absorbed by the body when using the phone. This type of radiation is not harmful to the human body, but it can be if you're exposed to large amounts over time. There have been no studies linking phone batteries to health problems, but it's still something to be aware of. If you're concerned about exposure to radiation, you can limit your use of your phone or use an earpiece and keep the phone away from your body.