Apple has upgraded its iPhone operating system to iOS 15.4.1, theoretically, the newer the system, the better, because many of the problems that existed in the previous old iPhone can be solved after the iOS update. However, due to the rich iPhone models, many models are old, so the latest iOS often does not support updates, so many iPhone users will have such a question, the latest iOS 15.4.1 in the end can be updated, what impact do they use on some of the old iPhones.
The old iPhones participating in the test this time are iPhone 6Plus, iPhone7Plus, iPhone8Plus, iPhoneX, iPhoneXS, iPhoneSE2020, iPhoneXSMax, iPhone11, iPhone11Pro, iPhone11ProMax, iPhone12, these iPhones are old models, But they are all in the list of iOS15 upgrades, so how about the battery life of these 11 old iPhones after the upgrade, let's take a look at the test process and results.
After 2 hours of battery life, the battery level of these 11 old iPhones, respectively, 14%, 49%, 26%, 34%, 48%, 45%, 54%, 56%, 63%, 53%, because it is a high-load mode test, so the battery of these 11 iPhones drops the battery power is particularly fast, such as the iPhone 6Plus battery power is only 14%, which is also the lowest current battery power. The highest battery power is the iPhone 11ProMax, and the reason for the long battery life is likely to be inseparable from the high battery level of the fuselage.
Judging from the test results, several old iPhone batteries have dropped more, such as iPhone 6Plus, iPhone 7Plus, iPhone8Plus, iPhoneX, iPhoneXS, iPhone SE2020, and the newer models, such as iPhone XSMax, iPhone11, iPhone11Pro, iPhone11Pro, The iPhone 12's battery is slightly slower.
After 4 hours of battery life, there are already two iPhones that drain the battery and automatically shut down, such as the iPhone 6Plus and iPhone 8Plus. Among the existing iPhones, the battery charge of the iPhone SE2020 is only 2%, which is already the iPhone with the least battery power, and the highest battery power is still the iPhone 11ProMax, reaching a 47% battery percentage.
During the four-hour test, the most battery power is still the three leaders of the iPhone 11Pro, iPhone 11ProMax, and iPhone12.
The final test results are as follows:
iPhone6Plus lasts 2 hours and 37 minutes, iPhone7Plus lasts 5 hours and 10 minutes, iPhone8Plus lasts 3 hours and 37 minutes, iPhoneX lasts 4 hours and 14 minutes, iPhoneXS lasts 5 hours and 11 minutes, iPhoneSE2020 lasts 4 hours and 4 minutes, iPhoneXSMax lasts 5 hours and 13 minutes, iPhone11 lasts 5 hours and 26 minutes, The iPhone11Pro lasts 5 hours and 49 minutes, the iPhone11ProMax lasts 6 hours and 58 minutes, and the iPhone 12 lasts 5 hours and 36 minutes.
Among them, the longest battery life is the iPhone 11 ProMax, and the shortest battery life is the iPhone 6Plus.
Summary and recommendations
For the newer iPhones with shorter release times, the iOS 15.4.1 upgrade is not a big problem, and the overall battery life performance under load conditions is also very good. However, the old iPhone is still trying not to upgrade, because the battery life is too short. For the experience after the iOS 15.4.1 upgrade, you can leave a message in the comment area to express your views.