View attachment 1976404
It's nonsense, really. It'll run on 1% all day too.
btw, this is what it did before that. Basically running down overnight. As I've joked before, it's almost like Apple are mining Bitcoin.
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Upgrades of IOS or OS Mac are always energy-intense.
not only the upgrade itself, also many background-activity.
After upgrades there are a lot of background-activities to adapt new features and for example completely new spotlight-searches and so on, often also new backups of the now-new apple-machines and iPhone and iPad - which is even more important when automatically set backups or data exchange with iCloud, especially when using wireless methods.
Many apps need updates as well if a new version of IOS/MacOS has been installed. The more you have apps, the more this will drain your battery by updating each of them immediately or day by day during the following weeks. If you accept that your app gives informations for optimising your apps this will result in a lot of background activity that you will not realise.
So it might be better to wait some weeks and THEN regard if the energy-consumption of a complete week with standard-use is better, worse or on par.
To reach for ,more objective arguments one should look at the apps and their energy-consumption, in IOS this is now easy.
ALL the new features of a new IOS/MAcOS don't fall from heaven, they need energy to be realised.
So even more draining some weeks later must not be "battery draining" but can be due to willingly or unwillingly execution of new features.
For example the feature "true colour" of the screen needs many calculations, IIRC.
And albeit I never ever use Bluetooth, after every IOS update I find Bluetooth ACTIVATED without any action from my side, which makes Bluetooth desperately search for other devices 24/7 ... THAT is apple´s fault.
Often people don't deactivate WLAN after upgrades which leads to desperate search of the activated WLAN 24/7 ... so just have a look at that.
I did not at all experience battery-drain on my iPhone SE models, be it a new IOS or just an upgrade-version. Just the contrary: The only change was often enough LONGER battery life...
cheers