Battery issue (+WiFi drops) since updating to e/OS v3.2

/e/OS Devices Murena
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Hello and apologies if this is in the incorrect topic thread. The issue pertains to the following device:
Murena One
Previously running 3.14; upgraded to 3.2 (currently running).

Apps are minimal (email, firefox, DAVx5) and no change have been made to fetch etc within the past (min) 3 months. Nothin has been added, taken away or changed- the phone has merely been used.

The issue started when the ADVANCE PRIVACY component lost its mind in notifications - I have seen the other thread. None of the fixes worked, and 3.2 had just been made available so I upgraded to e/OS 3.2; at this stage no noticeable battery drain was apparent.

The 3.2 upgrade took forever, with the download pausing regularly. No WiFi drop had been noticed at this point and eventually it updated.

SINCE v3.2 of the OS has been installed, battery drain was awful - massive in fact. Battery manager showed nothing. WiFi also kept dropping, visibly it would disconnect and either reconnect OR stay off for some time. Battery manager showed nothing and I experience 0 other issues with WiFi devices across the house.

Switching to Aeroplane mode (with Wifi, mobile…everything else…switched off first yielded no results. The batter drains irrespective of wifi, network, aeroplane, bluetooth, NFC (etc) settings being on or off.

At this point a full factory reset was in need, to eradicate any issues.

This has not worked. A full reset still shows the battery draining ~14% in 2 hours but only 4 applications listed, each consuming 1% or 2% - this leads me to suspect the OS is the drain. This ~14% fall occurs with 2 hours of doing nothing and with no apps installed above the base apps that are preloaded. WiFi is on (and no longer dropping) and there is no longer a SIM installed in the handset - mobile services are all off (as is bluetooth, NFC etc); battery however continues to plummet. I have switched on battery saver - no change. I have manually shut Advanced Privacy - only because it keeps restarting itself and showing as on - also no change. Screen brightness is very low, however once more - the battery falls rapidly without being used at all.

I wanted to know - has anyone else experienced this? Is there a known bug in 3.2? Is there anything that can be done that I have missed?

Apologies for the above being quite detailed, but I wanted to ensure that my steps and logic are out there, hopefully to be picked apart and resolved. I see that e/OS v3.3 is scheduled perhaps for November, so I am hoping that there is an inherent issue within the OS and the update will restore the phone to use; presently it is unusable as a daily driver, such is the battery degradation.*
*
*at no point does the phone feel warm/hot - the phone is not working particularly hard at all.

2

this one neither? Advanced Privacy Notifications - #2 by tcecyk

The batter drains irrespective of wifi, network, aeroplane, bluetooth, NFC (etc) settings being on or off.

severe. There’s a few on-device and off-device tools to look into it. I’m a fan of battery-historian (example threads, mostly fairphones), but it’s developer tooling.

I saw some mentions of “increased drain” at the 3.2 feedback thread, but not specifically for the Murena One - but as you said, it started with 3.1. Discourse can do in-topic search per thread, you might want to go through them

3

thanks for the above - that is really useful. I have further updates but they appear to be related to e/OS 3.2 and so looking to repost this thread in the OS-related topic will probably work best. In short - flight mode is fine, but when operating outside of aeroplane mode, WiFi drops are so frequent that I suspect it is draining the battery in doing much more work than before in searching, connecting, re-connecting etc…

4

Did you manage to make any progress on that matter?
I seem to have the same issue: FP3 with pretty bad battery drain since a few months.
I tried replacing the battery, but the battery still only lasts around one day, even when I don’t really use the phone.

I also have a second FP3 here, still running e/OS 2.9, which doesn’t have this issue and which I don’t want to upgrade because of this.

I attached my battery usage profile from 2 days ago. On the first day, I was charging my phone at work, and left the Wi-Fi off - battery drain for this day seems quite decent. On the second day, I was at home, with the Wi-Fi switched on, and the drain was much worse. Note that on both days, I didn’t really use the phone much.
The biggest chunk in the battery usage is the mobile network with a surprising 35%, the second one being the app of the German railways, which is known for spying, but nevertheless only using 5% of battery.

signal-2026-01-10-093943
signal-2026-01-10-0939431024×2048 176 KB

I tried to install battery-historian to dig deeper, but it seems pretty old and no longer supported, so I wasn’t lucky with that one.

But so my understanding is that this might very well be related to Wi-Fi and therefore more of an LineageOS than an e/OS problem?

5

image on gcr.io is gone. A 3rd party image from runcare offers a no-ssr mod (no external network dependencies). Same base layer as the original image

docker run -p 9999:9999 runcare/battery-historian:latest --port 9999

6

Thanks! Here is the battery usage for the same two days I posted above, but this time with battery historian.
I’m not familiar with the tool, so I’m a bit overcharged with information. Some interesting points to me:

  • “Wifi On” is green both days, although I’m pretty sure I always switched of Wifi when I didn’t use it on the left/first day
  • The amount of userspace wakelocks seems way higher on the second day, the one with the increased battery drain
  • “Mobile signal strength” is not indicated on the left day, which makes sense because I was at work were I have very bad mobile signal
  • There’s lines like “network connectivity”, which are only indicated on the day with low battery drain, which is confusing

Does somebody see something else that is interesting / worth digging deeper? Would it help to have the same information from the phone with e/OS 2.9 which doesn’t have the battery drain problem?

Screenshot from 2026-01-11 10-32-59
Screenshot from 2026-01-11 10-32-591662×591 95.1 KB

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Hello!

So the short version is that I have no idea what was causing it - I did a little digging myself but not to the level you had. An older OS did not present battery drain, but 3.1.4 and 3.2 did; I assumed the issue to be inherent within the OS and was waiting for an update (as this seemed a wider issue) as the fork-in-the-road as to whether I would investigate further.

However since the late December update to v.3.3 the issue has ceased/been resolved. With moderate use (my partner’s phone, so generally screen light on reading, using a messaging app etc) the battery lasts ~5 days before it is in the low single digits (so ~15%) which is acceptable and a return, pretty much, to how things were before.

Sorry I cannot help with troubleshooting - but the +ve is at least that the issue does appear, on my device at least, to be resolved with v3.3. Other issues such as the ‘Advanced Privacy’ notification loops, among a few other things recently introduced or realised, have also ceased to reappear with v3.3.

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Unfortunately, I can’t confirm that the update to v.3.3 helped.

It seems that others also have issues with battery drain on lineageOS (although not with FP3)

There hasn’t been much activity on these issues either, but I guess I still have to hope that something pops up that might also help me.

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