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I charged the battery of MacBook Air m1 to 88% before shutting the system down and in the morning when I started the system my battery percentage bar showed 95%. I went to battery usage history and it showed "last charged to 88%". What is going on?
MacBook Air 13″, macOS 11.4
macOS manages battery health now.
How battery health management helps
The battery health management feature in macOS 10.15.5 is designed to improve your battery's lifespan by reducing the rate at which it chemically ages.
The feature does this by monitoring your battery's temperature history and its charging patterns.
Based on the measurements that it collects, battery health management may reduce your battery's maximum charge when in this mode.
This happens as needed to ensure that your battery charges to a level that's optimized for your usage—reducing wear on the battery,
and slowing its chemical aging. Battery health management also uses the measurements to calculate when your battery needs service.
https://support.apple.com/en-us/HT211094?cid=mc-ols-energy_saver-article_ht211094-macos_ui-04022020
Startup in Safe Mode. https://support.apple.com/guide/mac-help/start-up-your-mac-in-safe-mode-mh21245/mac.
Quote:
It also does a basic check of your startup disk, similar to using First Aid in Disk Utility.
And it deletes some system caches, including font caches and
the kernel cache, which are automatically created again as needed.
macOS manages battery health now.
How battery health management helps
The battery health management feature in macOS 10.15.5 is designed to improve your battery's lifespan by reducing the rate at which it chemically ages.
The feature does this by monitoring your battery's temperature history and its charging patterns.
Based on the measurements that it collects, battery health management may reduce your battery's maximum charge when in this mode.
This happens as needed to ensure that your battery charges to a level that's optimized for your usage—reducing wear on the battery,
and slowing its chemical aging. Battery health management also uses the measurements to calculate when your battery needs service.
https://support.apple.com/en-us/HT211094?cid=mc-ols-energy_saver-article_ht211094-macos_ui-04022020
Startup in Safe Mode. https://support.apple.com/guide/mac-help/start-up-your-mac-in-safe-mode-mh21245/mac.
Quote:
It also does a basic check of your startup disk, similar to using First Aid in Disk Utility.
And it deletes some system caches, including font caches and
the kernel cache, which are automatically created again as needed.
Strange battery percentage
