Battery Presevation Wipout Bug MacOS 27

Whenever I restart my laptop, my custom battery preservation settings completely reset. Even though I have optimized battery charging enabled and manually set my charging threshold to stop at 90% to protect the battery’s health, every system restart wipes this configuration. The laptop automatically reverts to charging all the way to 100% and disables optimized charging, forcing me to re-enter my preferences manually after every single restart.

Posted on Sep 18, 2026 6:23 AM

1 reply

WheelieNick

Level 9 (74,110 points)

Sep 18, 2026 1:17 PM in response to 孟192

Hi there

Try this

Many users have successfully resolved the state-saving issue by completely draining the system residual power, forcing the battery management chip to re-write its preferences.

Go to System Settings > Battery, click the ⓘ next to Charging, and re-apply your 90% threshold.
Shut down your Mac completely.
Leave it powered off and unplugged from the charger for 15 minutes.
Plug it back in and boot up. The system should now correctly read and retain your saved configuration profile.