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  • Charging optimization (80% charge limit) recalibration with Android 15 QPR2

The 80% feature seems to be bugged now on the Pixel Tablet. It will keep charging to 90%. My guess is that it's trying to reach 100% for the calibration, but it can't reach it because it's limited to 90% elsewhere.

GrapheneOS Since you mention best practices, particularly regarding bypass charging with USB-PD, I would like your thoughts on low charging for comparison. Does charging the phone battery with an underpowered charger( 5V 550mA, 2.75W for instance) and keep the battery between 20% and 80% a good practice for battery life ? How do you think this compares to using USB-PD in the long run? Is there a risk of damaging the battery with an underpowered charger?

  • xxx replied to this.

      My tablet loads to 94% and says it is fully loaded. Is it supposed to be like that? Is the real capacity 94% and it will load to 80% of that after calibration?

      Does bypass charging work on Pixel 7?

      On stock Android bypass charging is only available for Pixel 8 and newer, but my Pixel 7 Pro does have the 80% charge limit, does it mean I also have bypass charging and can leave the phone plugged in?

        When it reached 100% I had to leave my phone plugged in for nearly half an hour before the shield icon appeared. Just an FYI for other impatient souls out there. 😊

          I have a question: Does the bypass charging also works with wireless charging (Qi)?

            I only got to 98% before the shield appeared. I left the phone charging overnight, around 7 hours in total. It's my first charge after installing 2026030800. Is this working correctly? It used to hit 100% before charging optimisation was switched on.

            • de0u replied to this.

              Popped on to see what the fuss was about (mine went above 80% too). Thanks for the info @GrapheneOS about how this (+recalibration) actually works 😁👍

              wagg3r I would suggest waiting a week to see what happens.

                  In my case, it charged up to 100% and after a while the shield icon appeared. But then the charge level slowly decreased, even though it was still hanging on the charger. I would have expected it to stay at 100% for a very long time. Was that the case for you too?

                    xxx Thank you for your answer :) Could you be more specific ? What do you mean when you say "kind of" ?

                      GrapheneOS The best thing for battery health will be using the battery optimization feature and leaving the device plugged in as much as possible to take advantage of bypass charging instead of repeatedly draining and charging the battery.

                      In situations where I detach from charger and come back with e.g. 60-70% left, does it make sense to always plug it back in or better to wait for it go down lower to e.g. 30% before plugging in? To put it another way, does increasing the amount of such smaller in total amount (60->80) charged charging cycles/sessions or to stick to lower amount of charging cycles where more total amount (30->80) is charged? In both scenarios afterwards always leaving the phone on charger.