https://www.tomsguide.com/us/iphone-xs-iphone-xs-max-battery-life,review-5773.html
“We put the iPhone XS and XS Max through the Tom's Guide Battery Test, which involves continuous web surfing at 150 nits of screen brightness. For this test, we turn Auto-Brightness off and True Tone off in the display settings.
To ensure consistency, we run all of our phone battery tests on T-Mobile's network, and we ensure that the phones have full signal strength by using a signal booster called the T-Mobile 4G LTE CellSpot. In other words, this is as close to ideal conditions as we can get while keeping everything repeatable.
The iPhone XS Max turned in a run time of 10 hours and 38 minutes, which is well above the smartphone category average of 9:48. However, the iPhone XS lasted for just 9:41, which is slightly below the average. Last year's iPhone X lasted 10:49 on the same test, despite claims from Apple that the iPhone XS was supposed to last 30 minutes longer.”
“We put the iPhone XS and XS Max through the Tom's Guide Battery Test, which involves continuous web surfing at 150 nits of screen brightness. For this test, we turn Auto-Brightness off and True Tone off in the display settings.
To ensure consistency, we run all of our phone battery tests on T-Mobile's network, and we ensure that the phones have full signal strength by using a signal booster called the T-Mobile 4G LTE CellSpot. In other words, this is as close to ideal conditions as we can get while keeping everything repeatable.
The iPhone XS Max turned in a run time of 10 hours and 38 minutes, which is well above the smartphone category average of 9:48. However, the iPhone XS lasted for just 9:41, which is slightly below the average. Last year's iPhone X lasted 10:49 on the same test, despite claims from Apple that the iPhone XS was supposed to last 30 minutes longer.”