iphoneX: Up to 2 hours longer.
iPhone X: Up to 30 minutes longer than iPhone X.
Apple xsmax: Battery capacity is 3,174mah.
Apple x: Height 143.6mm, width 70.9mm, thickness 7.7mm.
Apple xsmax: Height 157.5mm, width 77.4mm, thickness 7.7mm. .
The iPhone XS lasted eight hours and 37 minutes in the actual test, four minutes less than the previous generation iPhone X. Both have the same screen size, similar battery capacity, and similar battery life.
The iPhone Xs battery has a capacity of 2,658mah, which is slightly less than the 2,716mah of the previous generation iPhone X. However, due to the blessing of Apple's A12 bionic chip and the optimization of iOS12, Apple said that the battery life of the iPhone Xs increased by 30 minutes compared with the iPhone X.