Battery Life XA2 Dual Sim (H4113) 3.1.0.11 Seitseminen

answered 2020-04-12 16:04:38 +0200

Sakke
1933 ●27 ●51 ●52

So at least for me, I'm still experiencing battery drain exactly when 4G is on, XA2 Dual-Sim, Sailfish 3.3.0.14 and Finnish operator Elisa. The reason why I'm writing this as an answer is that I'm baffled how come Jolla doesn't recognize / confess this issue even though a lots of people have this exact issue with 4G draining our batteries. And I don't want to come as a whining person but this drain is not normal and it's well sure it lies somewhere in Sailfish rather than in hardware for example.

I tried to re-flash Sailfish with Sony v17B binaries in the hope that it could fix this drain and other issues too. Well, obviously it didn't fix the 4G drain. The issue is instantly fixed by switching to 3G and I got maybe 2% battery drain in 5-6 hours. As people (and I) have mentioned in the comments that the 4G drain is approximately 3-5% per hour which is a quite significant amount. I have also noticed that the drain happens exactly on 2% steps, so when the phone is on 4G idling and I have for example battery at 90% it goes straight to 88% and skips 89% instantly.

First of all, I live right next to a base station (about 30-40m) and the signal strength can't be the issue and I've checked the dBm are ok. Also I experience this exact drain everywhere regardless of my position or signal strength. There's no place at least in Tampere, Finland where I wouldn't experience 4G battery drain. Also I've been using my XA2 Dual-Sim with the stock Android for months before I flashed Sailfish and I never experienced any battery drain related to 4G or network in general. I've also had the same operator Elisa for years now and never have experienced any drain on other devices when it comes to network. This was the case with the Xperia X (with Sailfish installed) too when I had it between 2017-2018, no drain ever.

So what do you guys think? Do we have lots of bad networks or hardware failures? Or could it be that there's really something wrong with Sailfish. I also want to point out that this wouldn't be the first case when there are issues with network in Sailfish ;)

In my opinion, Jolla really should take a look at this issue since in the end working network is a necessity for most of us. On the other hand, it can't be that I have to switch between the networks all the time just to avoid battery drain due to some issues that are primarily unknown.

answered 2020-06-30 19:57:28 +0200

cg
581 ●5 ●12 ●12

although not a real solution, this idea helps a lot: https://together.jolla.com/question/227791/35-days-of-battery-instead-of-15-days-because-of-intelligent-network-switch/

answered 2019-11-01 22:28:24 +0200

manu007
1737 ●48 ●66 ●80

http://www.manu.ms/

updated 2019-11-06 09:47:19 +0200

I think the problem is not in the 4G, but in the signal strength.
I live in a village near Madrid, narrow streets and communications are not great, here is the result of putting my XA2 on the table of my studio:


Consumption of 3,25% by hour :

Now on the table at living room:



Consumption of 0,50% by hour :
Signal at studio: between -100 and -102 dBm
Signal at Living Room: between -91 and -89 dBm

Now with the WIFI ON:


My conclusion is that the problem is in signal quality, and this includes WIFI, I made other measurements with only WIFI and the result are +/- the same. I think we should not look for a problem in 4G / 3G, but rather improve a little bit the management of the system when the signal strength is bad.

1,27% by hour without WIFI and 1,39% with WIFI is not a big difference.
But, for me, the main problem of the XA2 is the battery.

2019/11/06: Added the column headers.