The Apple iPhone 11 Pro Max looks set to be a battery life champ

The iPhone XS Max proved no slouch in our battery life tests last year, despite its 3,174 mAh battery capacity. Our review unit lasted 12:22 hours in our practical Wi-Fi test, putting it only 25 minutes behind the Mate 20 Pro with its 4,200 mAh battery. By contrast, the Galaxy Note 10+ only managed a measly 8:52 hours with its 4,300 capacity.

However, the iPhone 11 Pro Max will likely fare even better in our battery life tests, since Apple has equipped it with a 3,968 mAh battery, although it claims 3,969 mAh for some reason. We have calculated the former figure based on the information displayed in initial teardowns. The teardown photo, which we have included below, reads the iPhone 11 Pro Max having a 15.04 Wh and 3.79 V battery. These values equate to 3,968 mAh, which matches the figure stated in the device's TENAA listing.

In short, that is a 25% increase over the battery it used in the iPhone XS Max. While batteries of this size are common for Android smartphones, this is the first time Apple has equipped such a large battery in an iPhone. The P30 Pro currently sits atop our practical Wi-Fi battery life test leaderboard with a runtime of 13:58 hours, but the iPhone 11 Pro Max may challenge that. While we doubt that battery runtimes will scale linearly, an additional 13% battery life from its 25% larger capacity would see the most expensive iPhone 11 be crowned our battery life champ.