[Micro-invasive WEC Technology] Last week, Apple pushed the iOS 15.4 official version update, and many people are updating to this version for the function of "mask unlocking".
The vast majority of users of the iPhone 12 series and iPhone 13 series will upgrade to this version, after all, only these two series support "mask unlocking", and other models do not support it.
After many small partners upgraded to iOS 15.4, they said that the battery life was not as good as the previous version, and I deliberately made a vote yesterday to ask everyone whether the battery life had become worse after upgrading to iOS 15.4.
29% of the small partners said no, 48% of the small partners said yes, and nearly half of the people said that after upgrading to iOS 15.4, the battery life became worse.
Combined with online feedback, there are indeed more small partners who reflect the decline in battery life, but it is not clear that their specific models, but they should be concentrated in the two models of the iPhone 12 series and the 13 series, after all, most people are upgrading it for the function of "mask unlocking".
There are also many small partners feedback, after upgrading to iOS 15.4, the battery health of the mobile phone fell very quickly, which was good, maintained at 100%, and after the upgrade, the value dropped.
This is most likely related to the data update, after updating the new system, the system recalculated your battery health, so there will be a problem with the value drop, correcting your battery health information.
That is to say, your phone shows that the battery health is 100%, in fact, its value is already below 100%, but you have not updated the system, and the value display is not so accurate. For the maintenance of the battery, we have done a phase of maintenance tutorial before, interested in small partners, you can find a look.
For the iOS 15.4 battery life problem, I personally feel that there is not much change from before, I am currently using the iPhone 13 Pro Max, may be the battery is large enough, this update does not feel a significant drop.
Only when I updated iOS 15.4 beta1 before, I could feel that the battery life had dropped significantly, and it was accompanied by heat, and then several versions did not have this problem.
I also did a battery life test last week, full of use to no electricity, from 12:26 a.m., used to 10:52 p.m., about 10 and a half hours, during which the light screen time is close to 7 hours or so, this endurance is basically similar to my last few versions.
You can talk about it in the comment area, after your model is upgraded to the official version of iOS 15.4, do you feel that the battery life has declined?