Battery drop on the xa2 using 5.1 stable

hello, i noticed that, from when i installed Sailfish 5.1 the battery on my Xperia XA2 last much less than before, and i think i’m not the only one, as i red other people in various telegram groups experiencing the same

i get the phone is old but it’s surely an issue with 5.1 as battery was okeyish with 5.0.x

is anybody having the same issue?

XA2 Dual. (no VoLTE)

I had a sudden battery drain today.
I was offline, just did some pics and sent them by MMS, around 12:00.
Here is the battery consumtion chart (first graph):
.

The only related event I can find is this LTE usage which happens at the begin of the high battery drain (first chart, in thin green):

I have also seen multiple remarks about the battery usage of the XA2 in 5.1 forum posts.

Created a bug report Weird change in sleep behavior in SFOS 5.1 and still experiencing this behavior. Lately I have to recharge my battery almost twice a day.

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didn’t notice that, but this means i’m not the only one

i hope we will come up to a solution, even thought batch 1 is near…

Yeah, I also get comfort from the same prospect of a new Jolla phone withing a couple of weeks (I hope). My XA2 has been my daily driver for a long time and I was positively surprised it got an Android update in 5.0. It’s a bit sad it might end with this battery issue in what could well be the last SFOS release for this device.

well, they said 5.1 would have probably be the last for the xa2 / 10 but they already compiled esr 115 for 32 bit devices

this lead me thinking that maybe 5.1 wasn’t the last release…

I mean, this might sound a bit stupid, but isn’t the battery drain normal? I don’t really think it’s something that can be fixed. Even my iPhone 13 started draining battery faster after the iOS 26 update. The XA2 is a very old device, and I think it’s normal.

I wonder why it should drain more for the same functions.
Not to say that nothing changed, but I miss where it is computing more than before.
If this bigger drain exists, I’d rather think of a stuck process, loop, etc.

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I see. So basically, you’re saying that the move to 5.1 wasn’t some evolutionary, game-changing update, and there’s no clear reason for the battery to drain faster. Yeah, that side of it exists too, actually. I don’t know, we need to look into it, or someone from the team involved in the update process could clarify the situation.

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Well, as you might know apple has been fined already for these practices of limiting your battery on old devices

Althought apple justified by saying that they are forced to cause you can’t expect old phones to work like new ones so they were limiting them

Which, is even true in a way, but i doubt sailfish 5.1 is so powerful it drains so much battery compared to 5.0, so they should, imo, look into the problem and if this 5.1 is really that powerful they should at least give us an explanation, i guess

I have no differences in power comsumption on Jolla C2 with latest SailfishOS Version 5.1.0.11. At Flightmode the best i can get is -0.19%/h like before the update. Its not all night the same comsumption for me, because i use several apps over the day and leave demons running so that may vary my mileage.

Fast draining battery happens when programs/tasks/daemons/drivers crash or performing polling-loops all the time for some faulty reasons like faulty race conditions, using fixed timers instead of event-handlers, run in debugmode and write tons of logs…etc.

Maybe this is related? Weird change in sleep behavior in SFOS 5.1