Before you turn on and start using your phone, it is recommended that you charge the battery.
As the battery is being charged, the notification LED shows a solid red light. The light turns to solid green when the battery is fully charged.
When you charge the battery and the phone is on, the charging battery icon is displayed in the status bar. After the battery has been fully charged, the charging battery icon turns to a full battery icon .
Note: As a safety precaution, the battery stops charging when it overheats.