Lower screen brightness
Turn on Auto-Brightness
Use Low Power Mode
Turn off Background App Refresh
Close unused apps
Disable Location Services for unnecessary apps
Turn off Bluetooth when not needed
Turn off Wi-Fi when not needed
Use Wi-Fi instead of cellular data when possible
Reduce screen timeout
Turn off Push Mail or fetch less often
Disable unnecessary notifications
Turn off AirDrop when not in use
Limit widget use
Update to the latest iOS version
Remove battery-draining apps
Use Dark Mode on OLED iPhones
Avoid extreme temperatures
Check Battery Health
Restart the iPhone occasionally