Reduce screen brightness
Use auto-brightness
Shorten screen timeout
Turn on battery saver mode
Close unused apps
Disable background app refresh
Turn off Bluetooth when not needed
Turn off Wi-Fi when not needed
Turn off GPS/location services when not needed
Use dark mode
Lower screen refresh rate
Disable push notifications for nonessential apps
Keep apps and system software updated
Avoid extreme temperatures
Remove unnecessary widgets
Limit live wallpapers and animations
Use airplane mode in low-signal areas
Charge before the battery gets too low
Avoid leaving the device plugged in for long periods
Use original or certified chargers
Replace an old battery if needed