Battery preservation settings

vawtair

Sadly, after upgrading to 2025091000, rebooting and plugging in charger with charging optimization enabled, my pixel 8 goes back to the "charging beyond 80% with charging optimization enabled" state. It seems the system upgrade cleared the persistent calibration result. I may have to perform a fully charge with charging optimization disabled to regenerate it later, as I am used to charging my pixel 8 full before excursions by temporary disabling charging optimization.

vawtair

vawtair KitsuneNoBaka ijk vontroxler
On 2025091000, after rebooting and plugging in charger with charging optimization disabled (identical to the state of this) to charge to 100%, I rebooted my phone at this state, and then plugged in charger with charging optimization enabled, my pixel 8 seemingly went back to the "charging beyond 80% with charging optimization enabled" state, and kept charging even reaching 100%, but after I unplug the cable and plug again (on 100% charge), the shield icon appears and the expected functionality of charging optimization is restored, which survives beyond further rebooting.

xxx

I don' t know whats going on with version 2025091000 my Pixel charges to 100% all the time so far. On current builds it stopped all the time at 80%.

At least I get the badge on the battery icon.

Quantum

xxx Welcome to the club

xxx

Quantum

Bummer :-(
Perhaps I should disable this stuff since my P6 is only supported on more year. For now I will wait.

Quantum

xxx You should keep the feature on. If you turn it off it'll always go to 100% without pass-through charging. If turned on it'll maybe sometimes stop at 80% and do pass-through charging at both levels.

xxx

Quantum If turned on it'll maybe sometimes stop at 80% and do pass-through charging at both levels.

Thaks I will keep it like that.

vontroxler

In the past week my phone has charged to 100% several times with battery optimization enabled. I do think something is broken.

Badrou53

vontroxler Same here on my Pixel 8a. It all started after one of the recent updates. In the past week the phone was charged multiple times until 100% until the shield icon appeared, but despite that it doesn't stop charging at 80%. I then tried some of the suggestions made in this thread to solve it, but still the same issue.

vontroxler

vawtair Thanks! Following these steps I see the shield icon again.. Hopefully it will continue working going forward.

xxx

Hurrah it works! I just waited things out!!! :-)

vontroxler

vawtair On another thread someone said a recent update made it so that it calibrates after every reboot now.

"It's part of the port to QPR1. Upstream code.

GrapheneOS devs don't list changes made to ASOP"

Sorry I don't know how or if it's possible to quote another thread.

ijk

vawtair didn't work for me 😒

vawtair

vontroxler

Sorry I don't know how or if it's possible to quote another thread.

You can just link it with markdown syntax. For example, in order to link to a thread like https://discuss.grapheneos.org/d/8330-app-compatibility-with-grapheneos within this forum, [link text](/d/8330-app-compatibility-with-grapheneos) will be rendered as link text.

Badrou53

xxx Same here. Whatever happened, it now stops charging at 80% again.

ijk

Badrou53 how long did it take to start working again? I let it charge overnight to 100% 3 nights in a row, but now I've resorted to turning charging optimization off before plugging/unplugging and toggling on once a charger is connected, but it's cumbersome.

vawtair

Updated to 2025112101, after a full charge my pixel 8 will stop charging on 80% with charging optimization enabled, but the calibration seems cleared during every reboot. If

vawtair plug in charger with charging optimization enabled

after reboot, my pixel 8 will always try to calibrate again by charging beyond 80%, regardless of whether a calibration has already been done before reboot.

vawtair These could be further simplified: In the state after step 3 (reboot with charging optimization disabled), if only plugging in charger with charging optimization disabled, enabling charging optimization later with charger online could stop charging at or above 80%.

This maneuver remains working, though.

vawtair

As the bug report suggested, this cannot be fixed until Android 16 QPR2.

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