For iPhone 6 and later, iOS 11.3 and later add new features to show battery health and recommend if a battery needs to be replaced. These can be found in Settings > Battery > Battery Health.
The Battery Health screen includes information on maximum battery capacity and peak performance capability.
Maximum battery capacity measure the device battery capacity relative to when it was new. A battery will have lower capacity as the battery chemically ages which may results in fewer hours of usage between charges. A normal battery is designed to retain up to 80% of its original capacity when operating under normal conditions.
If you notice your battery health is low or states to be serviced, schedule an appointment with us today at https://www.macmanstore.com/schedule.