Cannot identify the cause of high battery drain.

[drarkayl]

I have a Huawei Mate 10 pro and have been using it for about 9 months.
I used to have amazing battery life with close to 8-9 hours of SOT ( and still had like 20% remaining never really went too low).

Recently I have been getting a battery drain of over 20% per night even if the phone is in doze mode.
I tried every method of finding out the battery drain and could not find it, assuming its a system bug i reset the phone but it did not fix anything.

I have wifi scanning and data always on turned off , so it disconnects mobile data and wifi if the phone is not being used.
I have just factory reset my phone and am posting screenshots of all my battery monitoring.
https://imgur.com/a/vfa4SGo

Please help me identify what is causing this battery drain.

 

[drarkayl]

One other questions , how long ago you did the factory reset ? You still seeing this kind of drain after factory reset and 2 apps installed ? I just want make sure I'm following what your saying so I can better assist you.

So I was experiencing a battery drain and I couldn't figure out the root cause of it.
I thought a factory reset would fix it, so I did a factory reset a day ago and then made this post, since the reset did not fix it. The screenshots in the original post are directly after the factory reset.


Last night I left my phone on airplane mode while sleeping and it lost only 1% which is consistent with what I used to get before. I should be getting a similar performance without airplane mode.

 

[belodion]

Yes, you ought not to have to resort to airplane mode. Open a data connection. Let's get this fixed properly.

I'm not saying that there's anything wrong with either of your battery-monitoring apps, but it may be worth disabling them temporarily to see whether that makes a difference.

 

[drarkayl]

Yes, you ought not to have to resort to airplane mode. Open a data connection. Let's get this fixed properly.

I'm not saying that there's anything wrong with either of your battery-monitoring apps, but it may be worth disabling them temporarily to see whether that makes a difference.

yes, the airplane mode was just a control test just to confirm there was nothing else wrong. Now I'm going to further test this.

Going to leave my phone untouched for 3-4 hours with wife on data off and wifi off data on, the battery loss should be 0-1% as I used to get in both scenarios. Let me post back with what results I get

 

[mustang7757]

So I was experiencing a battery drain and I couldn't figure out the root cause of it.
I thought a factory reset would fix it, so I did a factory reset a day ago and then made this post, since the reset did not fix it. The screenshots in the original post are directly after the factory reset.


Last night I left my phone on airplane mode while sleeping and it lost only 1% which is consistent with what I used to get before. I should be getting a similar performance without airplane mode. View attachment 303838

Ok got it now , sorry for the late reply . I'll watch here see what happens with the steps you guys are trying here and will chime in info I can assist.

 

[drarkayl]

This was with WIFI ON , DATA ON , LOCATION OFF (no change still the same battery drain)


This was with WIFI OFF, DATA ON , LOCATION ON (no change still same battery drain)


I'm going to run wifi on and data off now but this seems to be a cell standby/phone radio issue.

 

[methodman89]

The phone radio is using 80% of the battery usage. that tells me that you have a weak signal, and that's causing the drain. (If the received signal is weak, it's assumed that the phone's signal at the tower will be weak, so the phone radio is transmitting at, probably, its highest power.)

Either you put the phone down in a dead spot at night (and a dead spot can be a few inches in diameter), or you're using the wrong carrier. Install LTE Discovery and see what the signal strength is. (The number should be 100 or smaller - it's a negative number, so the smaller the number, the stronger the signal.)

This is the problem you need to id. Why would it be so high? You say and show full bars. Problem gone with airplane mode. You should try Safe Mode. Though you say you only dl 2 apps, the phone app is a pre-installed dialer from Huawei, so if you don't want to go to Safe mode, force stop your phone app,then check your battery usage. Good luck

 

[mustang7757]

This was with WIFI ON , DATA ON , LOCATION OFF (no change still the same battery drain)
View attachment 303867

This was with WIFI OFF, DATA ON , LOCATION ON (no change still same battery drain)
View attachment 303868

I'm going to run wifi on and data off now but this seems to be a cell standby/phone radio issue.

This is a dual sim phone? If so do you use 2 sims ?

 

[drarkayl]

This is the problem you need to id. Why would it be so high? You say and show full bars. Problem gone with airplane mode. You should try Safe Mode. Though you say you only dl 2 apps, the phone app is a pre-installed dialer from Huawei, so if you don't want to go to Safe mode, force stop your phone app,then check your battery usage. Good luck

I could try disabling the dialer app which is preinstalled. Will do that next and record the stats. will keep you posted.

 

[drarkayl]

This is a dual sim phone? If so do you use 2 sims ?

Its a single sim phone.

Im using the American version.

 

[drarkayl]

So I tested the phone with Wifi enabled on airplane mode and still faced a similar battery drain which leads me to believe its an android system package or an app causing the drain. The drain has occurred on all the possible combinations.

I am going to try using safe mode now and will post back the results.

 

[drarkayl]

Ok, so I faced this drain in safe mode too.

It cannot be a rogue app it has to be some android package regularly calling the wifi/data services which is causing this.

How can I go about tracking this?

 

[belodion]

Try switching off Location temporarily.

The result from testing that may help to narrow it down further.

It may also be instructive if - and pardon me if you already know this - you tap the first three battery users as shown in your second screenshot, then tap Manage, then tap each package in turn, then tap Battery, where details will be shown of how active each package has been.

 

[drarkayl]

Try switching off Location temporarily.

The result from testing that may help to narrow it down further.

It may also be instructive if - and pardon me if you already know this - you tap the first three battery users as shown in your second screenshot, then tap Manage, then tap each package in turn, then tap Battery, where details will be shown of how active each package has been.

yeah, I think I'm gonna have to do that, there were just so many packages but ill make a note next time.

I already tested with location services turned off as posted earlier but ill turn it off anyway for the next couple days.

 

[belodion]

^ Doh. Sorry I missed that bit. I did read through to check whether you'd tried that but the thread is getting lengthy.

 

[Rukbat]

And it's definitely not a weak signal, -99db is a pretty strong signal. (And you get the same drain just using WiFi., which as nothing to do with the cellular signal strength.)

 

[mustang7757]

yeah, I think I'm gonna have to do that, there were just so many packages but ill make a note next time.

I already tested with location services turned off as posted earlier but ill turn it off anyway for the next couple days.

Have you had a recent software update?

 

[drarkayl]

Have you had a recent software update?

Not recently enough.

 

[drarkayl]

So i have done extensive testing and I think the problem is with one of the android packages.

So far what I know:

The problem persists in safe mode.

It disappears in airplane mode.

If phone radio is disabled the drain shifts to the wifi so its definitely network related.

Disabling and changing location settings has no impact.

Phone is going into doze so no particular wakelock issue as far as I have seen.

I think it's some package/process that is requesting a lot of network resources, but GSAM shows it in one of the networks tab.

How do I go about tracking what process this is? are there any specific apps that track network usage? maybe something like glasswire?

 

[mustang7757]

Not recently enough.

You tried lot of different steps and nothing , this is going be one of those head scratchers, seems doze is not doing its job because something causing a big drain at idle over night .

 

[drarkayl]

You tried lot of different steps and nothing , this is going be one of those head scratchers, seems doze is not doing its job because something causing a big drain at idle over night .

But the phone is going into doze.