7. Save up to 60% battery life
We’ve been consistently impressed with how long the iPhone X lasts. On many occasions, it lasts up to a day and a half.
Putting you phone in low power mode will extend the battery life even further. But you can extend battery life even more, by up to 60 percent according to AppleInsider’s tests, simply by using black wallpaper, inverting colors to create a pseudo “dark mode,” and by turning on grayscale mode.
These extra power-savings are the result of the iPhone X’s OLED display. Unlike traditional LCD screens, which have pixels that are backlit across the board, the pixels on OLED displays are individually lit. Black pixels are essentially “off” and not lit, therefore conserving power.