Long-Term Maintenance and Battery Health. Disable Wi-Fi when you are not connected to a trusted network.
Optimize iOS 11 Battery Drain Settings: Disable Background App Refresh and Location Services
Background App Refresh allows apps to fetch new content even when they are not actively open, which can continuously wake up the radio and CPU. Understanding the specific behaviors that trigger excessive power consumption is the first step toward restoring your device’s endurance.
Turn off Background App Refresh for apps that do not require instant updates. Background App Refresh and Location Services Two of the most common causes of battery drain in iOS 11 are Background App Refresh and Location Services.
Optimize Battery Life by Adjusting Background App Refresh and Location Services
If an update fails to resolve the issue, you may need to wait for a subsequent patch or contact the app developer regarding background fetch behavior. Location Services, especially when set to "Always" for apps that do not require precise location, cause the GPS radio to work excessively hard, significantly reducing battery life.
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