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macrumors 68020
Original poster
Sep 13, 2014

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

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.”


macrumors newbie
Apr 28, 2016
…this is because of the weak antenna – its burning akku to compensate; that also gives you a good dose of radiation.

Seth Matthews

macrumors 6502
Jun 1, 2015
The Ether
This just doesn't reflect my experience and really drives home how everyday use by the individual is the true marker for results.

My iPhone goes on the wireless charger at around 9:00 or 9:30 every night. Comes off at around 5:30. My Max is still around 50% at the end of the day. that is better than my X.


macrumors 68020
Dec 3, 2017
I’ve seen people claim the x battery was amazing and I’ve seen others claim it’s trash. These tests suck


macrumors 6502a
Jul 12, 2010
That's interesting. It's been pretty close for me the last two days between the Max and Note9. I found this video interesting as well


macrumors 6502a
Aug 10, 2009
With this test, they shouldn't measure battery life but how much data the phone has downloaded before the battery dies.

The new Intel LTE chip is supposed to have faster download speeds so you might get a lot more data on a full charge. Maybe at the expense of using a bit more power but in the real world that might not be an issue as it simply gets the job done faster resulting in longer idle time and thus longer battery life.


Sep 13, 2018
Owned an X and dont buy for 2 seconds that the X got 10 hours 49 min continuous web browsing.

The X battery life was average at best; somewhere between the regular size and Plus.
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