iOS 15.4 upgrade battery life test shows that the battery life of 5 iPhones has been significantly improved. Don’t update these 2 for now

After iOS15.4 is updated, what impact will it have on the battery life of these iPhones on sale? This is a question that Apple fans are very concerned about. Because every time Apple upgrades iOS, it is not perfect, and there will always be problems of one kind or another. So after iOS15.4 is upgraded, what impact will it have on the battery life of different iPhone models?

A total of 7 iPhones have been upgraded to iOS 15.4 this time, namely iPhone SE, iPhone 6s, iPhone 7, iPhone 8, iPhone X, iPhone XR, and iPhone 11. These 7 iPhones are old models that have been on the market for many years, so the images of these phones after the iOS 15.4 upgrade are particularly important.

After one hour of battery life, the remaining battery power of iPhone SE, iPhone 6s, iPhone 7, iPhone 8, iPhone X, iPhone XR, and iPhone 11 were 73%, 72%, 78%, 79%, 84%, 86%, and 80%, respectively. Compared with iOS 15.3 with the same battery life, the remaining battery power was 76%, 70%, 78%, 76%, 77%, 81%, and 82%, respectively. It can be seen that except for the iPhone SE and iPhone 11, the battery power percentages of the other five iPhones have increased.

After 2 hours of battery life, the battery power percentages of iPhone SE, iPhone 6s, iPhone 7, iPhone 8, iPhone X, iPhone XR, and iPhone 11 were 13%, 37%, 58%, 58%, 68%, 70%, and 65%, respectively. Compared with the same battery life with iOS 15.3, the battery power percentages were 25%, 38%, 52%, 53%, 66%, 65%, and 66%, respectively. Except for the iPhone SE and iPhone 11, whose battery power percentages decreased, the battery power of the other five iPhones increased.

After upgrading to iOS 15.4, the battery life of iPhone SE, iPhone 6s, iPhone 7, iPhone 8, iPhone X, iPhone XR, and iPhone 11 are 4 hours and 5 minutes, 3 hours and 54 minutes, 4 hours and 30 minutes, 4 hours and 40 minutes, 5 hours and 51 minutes, 6 hours and 7 minutes, and 5 hours and 21 minutes, respectively.

The battery life of iOS15.3 is 4 hours and 7 minutes, 3 hours and 32 minutes, 4 hours and 18 minutes, 4 hours and 28 minutes, 5 hours and 2 minutes, 5 hours and 47 minutes, and 5 hours and 31 minutes respectively.

The battery life of iOS15.2 is 3 hours and 45 minutes, 3 hours and 53 minutes, 4 hours and 12 minutes, 4 hours and 29 minutes, 5 hours and 17 minutes, 6 hours and 11 minutes, and 6 hours and 15 minutes respectively.

Judging from the test results, the battery life of iPhone SE and iPhone 11 has decreased after upgrading to iOS 15.4, while the battery life of the other five iPhones has improved.