Lower screen brightness
Turn on Auto-Brightness
Use Low Power Mode
Turn off Background App Refresh
Close unused apps
Reduce screen timeout
Turn off Location Services for unnecessary apps
Disable Bluetooth when not needed
Disable Wi-Fi when not needed
Use Wi-Fi instead of cellular data when possible
Turn on Airplane Mode in low-signal areas
Turn off Push Mail or fetch less often
Limit notifications
Disable Raise to Wake
Turn off Always-On Display if available
Use Dark Mode
Reduce motion and visual effects
Keep iOS updated
Check Battery Health
Remove widgets you do not use
Avoid extreme temperatures