Lower screen brightness
Use auto-brightness
Shorten screen timeout
Turn on battery saver mode
Close unused apps
Disable Bluetooth when not needed
Turn off Wi-Fi when not needed
Turn off mobile data when not needed
Disable GPS/location services when not needed
Reduce push notifications
Use dark mode
Lower refresh rate
Turn off background app refresh
Keep apps updated
Keep the device updated
Avoid extreme temperatures
Remove unnecessary widgets
Disable vibration and haptic feedback
Use airplane mode in low-signal areas
Charge before the battery gets too low