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

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.

                      whiskeywalrus
                      Batteries wear out the least if they have a 30% gap between the lower and upper range, i.e. never have less than 30% remaining charge and never have more than 70% charge.
                      It then also takes a little longer to achieve the corresponding number of full charge cycles.

                      A good compromise for frequent users or users of devices with very small batteries is charging at 20 to 80 %.
                      This wears out the battery more quickly, but the device can be used with fewer restrictions or the owner may not feel so restricted.

                      Conclusion: If it is possible for you or if you do not find it strenuous, charge the battery at 30 or 40 % and only charge it to around 70% if you are not using the device locally for hours on end.
                      It would be ideal if we could set not only 80% but also 70% as the charging limit in GrapheneOS.
                      If I understood the release notes correctly, the GOS developers may realise this later.

                          Eagle_Owl Batteries wear out the least if they have a 30% gap between the lower and upper range, i.e. never have less than 30% remaining charge and never have more than 70% charge.

                          Is it possible to provide one or more sources supporting this claim?

                              Every thing I read and the battery manufacturers I have spoken too about phone batteries, responded with similar results,
                              Charge your battery to saturation point, ie 100%, remove from the charger and use it as normal, but don't allow the battery below 20% routinely.
                              Every so often allow the battery to discharge fully, then charge it, this allows for recalibration on the battery etc. My 6a (July 2022 build) is coming up to 3 years old, the battery count is 128 and it behaves as new.
                              The problem with batteries as is everything else related to phones, is the human operating it. No one takes the time to look after the battery, the phone is used almost continuously, charged re charged and left on charge, no wonder the batteries fade. Removable batteries are the answer, but fewer devices would be sold,