This helps significantly improve battery life, and the only time you’ll likely need to crank your phone to 100% brightness is outside, in the middle of the day, when the sun is at its brightest. At any other time, you can reduce your phone’s brightness to 75% or lower.

You can use dark mode, which also saves battery power. If you don’t want to change your screen brightness and don’t want to use dark mode, you can turn on auto-brightness. This will optimize the battery consumption of the backlight.