Also happened after an Android update. Seems like the most common cause. It almost seems like we need to wipe the whole device clean and install the most recent version directly. The update seems to introduce some OS bug. I don’t know.
And again, the support wrote in my ticket, that even of I sent bugreport to be analyzed with Battrry Historian, they would have thwir procedure andcthat would be, to charge the phone, make a screenshot of rhe battery uaage tool, run it in safe mode until battery drops to 15%, make a screenshot again…
Hard to believe that they really propose such actions instead of using the data provided.
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Disabling 5G, which I had just enabled following the fix in the latest security update, did the trick for me.
It’s a tad pointless to have a 5G modem that I can’t use, but at least my battery is not draining like crazy anymore.
That is going to be the next point for me: My provider just announced to provide 5G for the customers and now I am curiously waiting to see how the phone behaves with 5G
Yeah, I need the 5G functionality, so I guess I have to reinstall everything every time they screw up the update xD Mine works wonderfully for now.
I also posted in this forum post: Fairphone 4 Mobile Data Battery Drain - #19 by Kareya
I’m also noticing insane battery drain by the mobile data. Ludicrous numbers of up to 63%! Battery is lasting not even a day like this.
It’s absolutely mental that I only have this phone for 7 months and already am considering replacing it even though I bought it specifically to last me a long time due to it’s long support. But when the software is this buggy, how is that even an option?
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Hi, you did a factory reset? And now the battery is no longer draining? How long does the battery last now? Thanks
See my previous post. I did the “flashing with fastboot” process. Usually, you do this to install a custom operating system (OS) like /e/ OS. I believe this is not a simple factory reset and removes most, if not all, of the OS components. But I am no expert here. I can only say that /e/ OS is also Android-based. It encountered the same issue described by others in this forum running Fairphone OS right after an update (literally the next day). The culprit is the mobile network.
Battery life is just as new as far as I can tell. I do not have to constantly think about connecting the phone to a power source.
The major drawback of installing the most recent version of Fairphone OS this way is that you will need to deal with the command line, adb and all the issues along the way (the process wasn’t exactly correct in my case, and I had to fiddle around a bit). If you want to try it, read the documentation carefully and get ChatGPT on board to assist. If you use ChatGPT as an assistant get the paid version and pay attention that you use the GPT 4 model. Most people don’t know this, but the paid version is far superior to the free one and super helpful for anything programming related.
I hope this helps.
You dont need a paid ChatGPT Version to run the fastboot script, you can even do it without adb commands. Just follow the official instruction.
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Unfortunately, “just follow the official instruction” did not quite work in my case, and before they get stuck and search through loads of unhelpful forum posts, GPT 4 is a good option to understand what is going on. Just a suggestion. To each their own.
One question regarding the installation via fastboot: What exactly is being deleted during this process? /data seems to be clear, but is /sdcard also affected?
I am thinking of going through this procedure and currently I am preparing everything for that.
sD card formatted external? Just take it out to prevent issues or what do you think might happen?
People van for sure decide on their own, however im general ask questions here, thats what the forum is for.
Yes, removing the external SD (and SIM) is clear. The question was regarding the internal dir /sdcard/, but I guess this is cleared as well as /data
A factory reset removes all your installed apps and data, not sure what is stored on internal memory/sd…
I guess a reinstall of the OS will touch everything…
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Can you please provide a link to the Systempanel app you are using (I am currently using the AccuBattery app)?
I also encounter a similar reduction in battery life after upgrading to Android 13 (now on FP4.TP25.C.095.20231219, will be soon upgrading to the latest release). I have also disabled 5G (and tried other tips), but without improvement. I notice it particularly when streaming audio (with the display being off) over WIFI; I have tried to disable Mobile data completely (by disabling the SIM), but that has not changed the situation
It is not available anymore, neither in the Playstore nor on the dev webpage
With every fix comes a new major issue. That’s Fairphone’s update policy
Thats just not at all helpful to resolve any issue, so please follow rules of the forum when posting and if you just want to express your frustration there are several discussion topics to do so.
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BTW, this has nothing to do with Fairphone’s update policy, it’s just Lubarsky’s Law of Cybernetic Entomology: There’s always one more bug.
But: I took it upon myself to reinstall FP4 from scratch and in the process did one or two extra rounds and lost my Signal Messenger history due to my own stupidity (according to the motto: Backup is easy, Restore is tricky).
In the end, however, it seems to have helped in my case and the battery drain is by far less than before. I really do hope it stays that way 
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