The measured battery life of 9 iPhone is iOS 15.2. 1: The battery performance of these three models is degraded after upgrading.

Apple has officially released iOS 15.2. 1, and this upgrade is mainly to repair photos transmitted by iCloud. Because every time iOS is upgraded, users will worry about performance degradation, especially battery life, so it is best to observe it first to see if there will be embarrassing failures after the upgrade.

Well-known foreign technology bloggers have actually measured 9 iphones, including old iPhone, new iPhone, iPhone6S, iPhone7, iPhone8, iPhoneXR, iPhone 1 1, iPhone 12, and iPhone 13. Not only the old models, but also the new models like iPhone 13 participated in the test. It mainly tests the endurance performance and performance deviation after the upgrade of iOS 15.2. 1, but the result is a bit unexpected.

First, fully charge all 9 iPhone, and then set the screen brightness to 25% and set it to automatic brightness. Use GeeKBench to run the endurance test, and compare the changes of battery life and battery performance before and after the upgrade, so as to draw the conclusion that the battery performance has improved or decreased.

Next, let's take a look at the test results of these 9 models:

Old iPhoneSE

IOS 15.2 battery life test: 2 hours and 49 minutes.

IOS 15.2. 1 endurance test: 2 hours and 53 minutes.

As a result, the battery life increased by 4 minutes.

Battery performance loss:

iOS 15.2: 1690

IOs 15 . 2 . 1: 1730

iPhoneSE2:

IOS 15.2 endurance test: 3 hours 16 minutes.

IOS 15.2. 1 endurance test: 3 hours 18 minutes.

As a result, the battery life increased by 2 minutes.

Battery performance loss:

iOS 15.2: 1960

IOs 15 . 2 . 1: 1976

iPhone6S:

IOS 15.2 endurance test: 2 hours and 36 minutes.

IOS 15.2. 1 endurance test: 2 hours and 33 minutes.

As a result, the battery life was reduced by 2 minutes.

Battery performance loss:

iOS 15.2: 1560

IOs 15 . 2 . 1: 1530

iPhone7:

IOS 15.2 endurance test: 3 hours and 44 minutes.

IOS 15.2. 1 endurance test: 3 hours and 34 minutes.

As a result, the battery life was reduced by 10 minute.

Battery performance loss:

iOS 15.2:2230

IOs 15 . 2 . 1:2 13 1

iPhone8:

IOS 15.2 endurance test: 3 hours and 44 minutes.

IOS 15.2. 1 endurance test: 3 hours and 23 minutes.

As a result, the battery life is reduced by 1 1 min.

Battery performance loss:

iOS 15.2:2 123

IOs 1:2020

iPhoneXR:

IOS 15.2 battery life test: 5 hours and 6 minutes.

IOS 15.2. 1 endurance test: 5 hours and 6 minutes.

Therefore, the battery life remains unchanged.

Battery performance loss:

iOS 15.2:3043

iOS 15.2. 1:3042

iPhone 1 1:

IOS 15.2 battery life test: 5 hours and 9 minutes.

IOS 15.2. 1 endurance test: 5 hours and 33 minutes.

As a result, the battery life increased by 24 minutes.

Battery performance loss:

iOS 15.2:308 1

IOs 15 . 2 . 1:33 15

iPhone 12:

IOS 15.2 battery life test: 6 hours and 33 minutes.

IOS 15.2. 1 endurance test: 5 hours 4 1 minute.

Therefore, the battery life is increased by 8 minutes.

Battery performance loss:

iOS 15.2:3927

IOs 15 . 2 . 1:40 10

iPhone 13:

IOS 15.2 battery life test: 8 hours and 29 minutes.

IOS 15.2. 1 endurance test: 8 hours and 29 minutes.

Therefore, the battery life remains unchanged.

Battery performance loss:

iOS 15.2:5090

IOs 1:5090

After upgrading iOS 15.2. 1, the battery life and performance of the three models of iPhone6S, iPhone7 and iPhone8 have all declined to varying degrees. IPhone7 dropped 10 minutes, so users of these three models can not consider upgrading for the time being. After the upgrade, the battery life of iPhone 1 1 increased by 24 minutes, which is the best among the nine iPhones!