Hello there,
unfortunally I've an issue with my Pixel 9 Pro while running GOS: Around the update from Android 14 to 15, I'm facing Battery Draining Issues. When I'm unplugging my Phone from the charger in the morning around 8 a.m., my Battery is only lasting 4-5 hours and need charging around lunch-time. And this with maybe 1-2hours of screen time.

Yesterday afternoon I was going for a walk for an hour and lost 28% with zero screen time.

I've looked in the battery manager for Apps, which might could cause this. I thought I found the App but everytime I deinstall it or restrict background usage and -data, another App is comming up and draining my battery. At first it was a video app, then Molly, then Brave, yesterday my fitness app, today RethinkDNS... I've already restrict the background use for almost every app in every profile...

My phone has the lastest updates installed. My Apps are up-to-date. The Battery Manager is turned on. I restarted my phone on several occasions. Also you can feel that it is happening, because the phone is getting pretty warm. But I cannot stop it, even if I ending apps the hard way. I can't recall this behavior with Android 14. I'm out of ideas, maybe some of you have an idea?

Where can I best address this Issue? And sorry for my english, I'm not a native speaker 😅

    BobbX unfortunally I've an issue with my Pixel 9 Pro while running GOS: Around the update from Android 14 to 15, I'm facing Battery Draining Issues.

    I have had the opposite happen. My phone's battery is lasting a while longer after the Android 15 update.

    BobbX The Battery Manager is turned on.

    What is "The Battery Manager"? It might be helpful to know what this is.

    BobbX I thought I found the App but everytime I deinstall it or restrict background usage and -data, another App is comming up and draining my battery. At first it was a video app, then Molly, then Brave, yesterday my fitness app, today RethinkDNS...

    How are you figuring out which app is causing the drainage? It doesn't make sense that one app would be the culprit then the same exact issue is caused by a completely different app later on.

    Another thing you can try if you haven't already is to check which apps are active by swiping down from the top of your screen (to show the notification shade), then again (to show all quick settings tiles), then at the bottom of your screen, you should see some circular icons, one of which will have a number inside. Tap that circle, and you can see which apps are running.

      other8026

      other8026 I have had the opposite happen. My phone's battery is lasting a while longer after the Android 15 update.

      I hope thats the case for most of y'all ;) But I'm not sure, if it is connected to the upgrade.

      other8026 What is "The Battery Manager"? It might be helpful to know what this is.

      I'm sorry, I'm not sure how it is called if your system language is English. If you go into your settings and choose "Akku" or "Battery" you'll find the menü point for a Akku-/Battery-Manager.

      https://i.ibb.co/PNHfTRc/Screenshot-20241110-081448.png

      other8026 How are you figuring out which app is causing the drainage?

      I'm looking it also in the settings up. Still, don't know how it is called in an english menü. I guess: Settings - Battery - Battery-Usage(?)

      There you can find a list:

      https://i.ibb.co/SNWNvxm/Screenshot-20241110-081527.png

      other8026 Another thing you can try if you haven't already is to check which apps are active by swiping down from the top of your screen (to show the notification shade), then again (to show all quick settings tiles), then at the bottom of your screen, you should see some circular icons, one of which will have a number inside. Tap that circle, and you can see which apps are running.

      Thanks, good Tipp :) The Apps I found there don't have that much of a drown. At least there are not far up in the list in the Battery Usage Menü.

      Maybe I need to set up my Pixel 9 Pro completely by scratch...

        BobbX instead of looking at apps, check the toggle "Nach Apps filtern" and switch is to the other option. Share a screenshot of that. I have the feeling that cellular might be draining the battery.

          BobbX Hmm. I was wondering if you were using a 3rd party battery app, but that's not the case.

          If the app that's causing issues isn't in the active apps list, then I'm not sure what it could be. Looking at logs might show an app misbehaving, but it's strange that other apps are getting blamed for battery usage in the battery usage list.

          I'm not sure what else to suggest you try right now. Hopefully splattergames is on to something or another person in the community has some other ideas that'll help you fix the issue.

          splattergames

          Thanks, that was also interessting insight. Although I'm not sure what to do with it ^^

          At the first part of the day, it was WiFi/WLAN. At the second part of the Day, after a recharge of the Battery, it was the System (IDLE) and Cellular:

          Screenshot 1: https://i.ibb.co/5hw7JZh/Screenshot-20241110-140049.png
          Screenshot 2: https://i.ibb.co/XLCR5SQ/Screenshot-20241110-231434.png

          de0u

          Good idea. I disabled 5G at the second charge yesterday, but made no difference at all :/

            BobbX if you were connected to Wi-Fi during the time, 24% is pretty high. 60-something-% for Wi-Fi is also extremely high. Do you have Wi-Fi calling/VoLTE enabled? If there's a backend problem with these, they will try to register all the time draining the battery. Try turning off both VoLTE and Wi-Fi calling in the settings of your SIM-card for a test. This will give you worse call quality, but you can check if that's part of the problem.

              You use some kind of VPN? or and

              BobbX RethinkDNS

              try disabeling them. I think they eat the battery.

              Wouldn't it be possible you just have battery damage, from a manufacturing defect or something, that just happened to coincide with the update? It would certainly explain why the battery warms up like this for no reason and drains fast.

              The alternative would be some kind of malware using system resources to the max and hiding itself very well, but I guess the chances of that are lower.

              I have had similar issues with the same device it's been somewhat intermittent but from time to time the device would be sitting with the screen off and be warm to the touch. Draining the battery a significant amount usually closing apps doesn't really seem to help (maybe slightly) however a reboot each time would solve it.

              At first i thought it might have something to do with how the device interacts with Google cast devices on the local network but was not able to replicate anything firm around that. Then i thought perhaps it was Home Assistant polling often so i disabled that app. Still continued to have the same issues.

              Checking the output on top on the phone through ADB i could see that when in one of these drain states the system_server process was consuming the most CPU along with com.google.android.gms.persistent. Killing the gms process reduced CPU but the system_server remained unchanged.

              Processes During Battery Drain: https://imgur.com/a/hLiE0In

              Restarting the phone and checking the running processes again the utilisation is much lower.

              Processes After Reboot: https://imgur.com/a/A00XXBa

              I noticed after not being connected to WiFi for a while that the battery drain is suddenly not an issue and battery life is much improved. For the time being i'm going to remain using mobile data only to see if i encounter the same issues if i don't that at least narrows it down a bit. Checking now with the phone WiFi the CPU usage appears to be even lower.

              Processes on Mobile Data, WiFi Off: https://imgur.com/a/XsDydQo

              Taking a look in the data usage of the phone it appears on WiFi that "Android OS" says it has used a total of 369GB which is just absurd. I'm not sure exactly how that's calculated and if that's normal or not, my old device has 180 GB for the same time period which is the 16 Oct to 13 Nov but the Pixel 9 Pro I've only had since the start of the month, something is very strange there i haven't done any large data transfers.

              I'll keep monitoring things without WiFi and then all going well start trying to narrow down if an app causes the system_server process to go crazy or if there is some other way this can be replicated.

              So a couple of days running without WiFi and in comparison the battery life has been stellar. Pretty much as expected.

              I'll now connect the phone back to a WiFi network providing internet only (no local services) and see how that goes if issues return i'll start disabling apps in hopes of find a culprit.

                CubedMel0n if that keeps happening and you can't find a culprit, you should even consider a hardware issue. You can sadly only test if the same behavior occurs on Stock, so you would need to backup your data and flash back the Stock image to find out. If it happens there too, get the device replaced under warranty.

                splattergames

                Thanks for the Tipp 🙂 I tried it but doesn't made a difference 😕

                CubedMel0n

                I think it is the same here. The last few days everything was alright here. The only thing i changed was, that i turned off the phone completely at night while charging.

                Yesterday i was on the road and needed a Hotspot and used some public WiFi. After that drain starts again and got better after 15 - 20 Minutes i turned WiFi off again.

                In the evening and only in cellular I had also a drain, were 87% was used by cellular 5g. I couldn't find any app causing this. Seams to be connected to data usage via WiFi and under circumstances maybe 5g.

                But I'm out of ideas to fix anything. Next steps are maybe to deinstall and reinstall GOS again. Maybe it helps to have a fresh Android 15 GOS Installation. I'm not sure and will watch the issue the next days...

                  BobbX with "I tried it" you mean you installed Stock Android again? If that is the case, the phone has a hardware defect most certainly.

                    splattergames

                    Sorry, I didn't used the "Quote"-Function. You wrote to deactivate the Wi-Fi calling/VoLTE Function. I tried that, but made no difference.

                    I don't want to switch to stock - to much work and to much Google :D

                    But I'm affraid that will be the only way to find out if its a hardware defect :/

                    So as soon as i was back on WiFi i was having issues again i disabled one or two apps i considered logical choices given the circumstances but my phone would be sitting on WiFi constantly pulling down about 3 megabits of data per second.

                    Since i could see that data usage was a give away in my case i tried seeing if i could do some packet captures not sure they were really of any help i decided to see if i could find any apps that might be able to breakdown or meaure data usage of apps on WiFi since the system really only resents this data at that granular level for mobile data and the system apps are all clumped together looking at WiFi usage.

                    I installed Data Monitor from F-Droid and it was able to break down system app data usage. The culprit is "Dynamic System Updates". Today it has pulled down about 30 GB for me and because I've been on WiFi battery has been terrible again.

                    It's looking like a system issue as this is a system app, it can't be removed or disabled and i don't believe it is installed as part of Google Play Services. In the interim i can workaround the issue by only enabling and using WiFi when needed but this is a pain. I suspect there is a bug of some sort, i've saved the app logs for review but i'm not an Android developer so what i can extract from them will likely be limited.

                    If anyone can provide some input on what Dynamic System Updates actually does and why this may be occurring i would be interested to hear. Further to this i am happy to work happy to work with the right people in isolating any potential bugs and finding solutions for them.

                      BobbX interesting you had drain issues from 5G you could experiment in the settings to set the phone to use 4G only and see if that helps in that case. You can also see my reply about my findings with data usage of the Dynamic System Updates app and see if your device has the same issues in that regard.

                      Might at least answer one of your battery drain questions.

                      CubedMel0n from what I understand that's part of the system updater. In the logs I can see it monitor WiFi quality (also metered, non-metered etc). Can you check your Settings -> System -> System updates? Try switching around settings for permitted networks for example. Also, you might grab the logs of Dynamic System Updates, that might help as well.