The iPhone 14 Pro Max has the largest battery in the iPhone lineup, which is one of the reasons you would want a phone that size. The battery capacity of the iPhone 14 Pro Max is 4323 milliamp hours (mAh), which is less than the 4352 mAh of the iPhone 13 Pro Max.

However, there is no significance to the difference between the newer and older Pro Max phones. According to the Geekbench 4 battery test, the iPhone 14 Pro Max’s battery lasted 12 hours and 40 minutes, or about an hour more than the iPhone 13 Pro Max. The iPhone 14 Pro Max’s battery life was 3 hours, 43 minutes longer than the iPhone 14 Pro’s. This translates to a 30% increase in battery life from a battery that is 35% bigger than the iPhone 14 Pro.

Geekbench 4 battery test results don’t match Apple’s ratings of 29 hours for on-board video playback, 25 hours for streaming video playback, and 95 hours for audio playback because this test is very demanding and performs a combination of CPU- and GPU-intensive tasks. The auto brightness and True Tone were turned off, and the iPhone was set to 200 nits during the test. The Always-On display, which only turns on when the screen dims, is not considered in this test. With that factored in, you get roughly the same battery life as the iPhone 13 Pro, which isn’t necessarily bad.

The iPhone 14 Plus, which Apple will release soon, may outperform the 14 Pro Max if battery life is your primary consideration when selecting a large iPhone. The 6.7-inch 14 Plus is said to have the same 4,325 mAh battery as the Pro Max. However, the ProMotion and Always-On displays are absent from the 14 Plus, and their brightness ratings are lower. These elements might have an impact on the performance of the 14 Plus battery. 

The USB-C to Lightning cable and 20W charger work together to provide the same fast charging for the iPhone 14 Pro Max. Although Apple’s 20W USB-C Power Adapter costs $19/£19 and functions ideally, we advise choosing a third-party adapter because you can find one that is more affordable, smaller, or has more ports. The magnetic connector, known as MagSafe, is a feature of the iPhone 14 Pro Max. However, Apple does not supply a MagSafe charging cable. For $39/£45, you can purchase one from Apple.

DXOMARK Battery Test

The Apple iPhone 14 Pro Max received a tremendous overall rating but is slightly behind the iPhone 13 Pro Max. The “always-on display” mode, disabled for all models in this test for a fair comparison, wasn’t activated when the most recent device was put to the test. Although the results remained close, the 13 Pro Max’s score difference was primarily the result of slightly worse performance in the calibrated and on-the-go tests.

With an average loss of less than 2% per night during the typical usage scenario, the iPhone 14 Pro Max displayed excellent performance. The screen’s brightness outdoors was excellent, but it slightly reduced autonomy. While using the new, demanding camera and while conducting the navigation tests, battery performance suffered. However, autonomy was excellent when scrolling social apps tested in the subway. Although the autonomy was slightly below average in the call test, it was above average for all use cases when testing in calibrated mode.

The small 20W charger needed 2 hours and 21 minutes to charge the 4323 mAh battery fully. Similarly, the wireless charger took longer than usual—2 hours and 44 minutes—to fully charge the battery. Both wired and wireless chargers had very little residual consumption.

Additionally, the discharge currents were very low, indicating that the device was well-optimized for any application.

Due to its special autonomy and efficiency compared to other devices in the same Ultra-premium price range ($800+), the iPhone came in second, just behind its predecessor. However, it had one of the lowest charging scores.

Gsmarena Battery Test

In this battery test, the iPhone 14 Pro Max generally performed better with the screen on than its predecessor. Three and a half hours longer than the 13 Pro Max, 23:39 hours of Wi-Fi web browsing, and 24:38 hours of offline video playback (a less significant 30-ish minutes increase) were measured. While standby performance slightly declined, they timed identical call longevity this year at 27:23h (27:26h on the 13 Pro Max). All of them add up to a total endurance rating of 121 hours.

At the 30-minute mark, a slight charge state improvement compared to the 13 Pro Max (48% vs. 42%) was noticed, but the new model took a little longer to reach 100%. (1:52h vs. 1:46h, neither is excellent). A Galaxy S22 Ultra charges much more quickly to 100% (1:03h) and displays a more reassuring 60% halfway through the process with its standard 25W charger. 

The Optimised Battery Charging toggle in settings should be helpful if you want to get the most extended battery life possible out of your iPhone. It enables the iPhone to customize its charging curves to match your charging habits, primarily related to overnight charging and sleep schedules, thereby reducing the time the battery is at 100%. Up to 80%, it will charge quickly and finish just before you anticipate needing the phone.

Final Thoughts 

The iPhone 14 Plus and iPhone 14 Pro Max should be on your shortlist of new iPhones if you are seriously concerned about battery life. The two 6.7-inch iPhones are the way to go if you want to leave the charger behind. The 6.1-inch iPhone 14 and iPhone 14 Pro have good battery life, especially for their size.

It’s also important to note that the iPhone 14 Pro Max’s battery life almost outperforms its closest rivals, Samsung and Google.