sustaining
The iPhone X comes with a 2,716 mah battery, which is higher than the 1,821 mah of the iPhone 8 and 2,675 mah of the iPhone 8 Plus.
Some users were concerned that the iPhone X's OLED screen and features like Face ID would consume more power, but the larger battery capacity and more efficient A11 Bionic processor seem to have helped improve battery life.