Did this update break battery optimization by any chance? Updated a device while plugged in at 80% and it charged itself to 100% after updating.
GrapheneOS [Unofficial]
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GrapheneOS is a privacy and security focused mobile OS with Android app compatibility.
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This is a community based around the GrapheneOS projects including the hardened Android Open Source Project fork, Auditor, AttestationServer, the hardened malloc implementation and other projects.
As explained in the Settings > Battery > Charging optimization description below the toggle, the device will occasionally need to charge to 100% in order to recalibrate estimated battery capacity. The recalibration seemingly didn't work before Android 15 QPR2 but has been fixed. For most users with this feature enabled, you're due for a recalibration which will happen after updating to the latest GrapheneOS releases based on QPR2. 2025030700 will be reaching the Stable channel soon. Once it reaches 100%, it needs to be allowed to stay there for a bit to truly reach full battery charge. The shield icon showing charging bypass is active will appear. After the shield appears, it will go back to not charging the battery above 80% again. Since it has charging bypass, it won't start dropping from 100% much until you unplug it since it's directly powered from the charging cable as usual.
Many people were confused by this with the stock Pixel OS after updating to Android 15 QPR2 and believed the feature wasn't working anymore. We decided to get ahead of the confusion and make a post explaining it before it reaches Stable today.
I hope this answers your comment.
I personally don't have that problem. The option does note that it will occasionally charge to 100% for calibration purposes.
Absolutely forgot that was a thing 🤦♂️ Yeah that’s what seemed to have happened, hasn’t gone up to 100 since then.