The last few days I've (once again) encountered weird battery drain behaviour for my Samsung Galaxy S6 Edge. I've had this kind of behaviour before, straight after new security updates. However this time it's different. I have installed the latest build (G925FXXU5ERB1) on 27-02-2018. This time however the drain started about 10 days after the update.
I have not installed any new apps on my phone during that time. I did let Google Play automatically update all the apps that were already on the phone. I don't know which apps it did and did not update during this time.
The last time I had this problem a factory reset solved my problem so I figured it would do so again, but it didn't. I also wiped the cache to no avail.
What does stand out is that the battery usage is normal when I turn Airplane mode on. To show the difference, normally when I have my phone in standby during the night (~8 hours or so) it would only drop about 1% maybe 2% whereas it now drops 30% or more. Right now, with Airplane Mode turned on, it will only drop 1% over an 8 hour standby period.
I have most of the bloatware turned off. (Facebook, Samsung Health, those kinds of apps.)
There's no abnormal CPU usage when I show the graph onscreen from the developer options. And there don't seem to be any irregular apps running when I check the active services. The battery save mode is set to mid. The bettery screen shows no unusual battery behaviour by rogue apps.
Now, there's tons of people having problems like these all over the internet, but there seem to be very few answers as to what exactly is causing this problem. I'm not looking for advice that I should go to a store, I want to find out specifically what the underlying culprit is here. Seeing as the phone acts normal when Airplane Mode is on, it strikes me as a software problem. But I'm pretty much out of ideas at the moment.
Let me know if you need any additional info.
If anyone has any new ideas or forums that could lead me in the right direction, that would be great.
Thanks in advance.
Id suggest to put the phone in Safe Mode which will turn off all the downloaded apps and leaves the stock ones alone which can then help you determine if its a rogue app causing this issue.
If no joy and a factory reset is not helping then a Samsung Experience Store or Samsung Service Centre location can run a diagnostic on the phone.
Current Phone ~
Samsung Note 20 Ultra 5G SM-N9860_256Gb SnapDragon 865+
Samsung One Ui 3.1/ Android 11.
Have you checked your wifi settings-->advanced wifi settings-->keep wifi on during sleep = OFF
This setting must be turned to off, else the drain can be really harsh and noticeable.
IF it is not that it could be one of those script miners at work that use your hardware when you browse certain websites without your consent to mine cryptocurrencies..If in doubt, clear your browser cache, plugin data etc and use the phone without surfing to test whether something changes. (You could also disable java script in browser and test that way)
Thanks for the advice but the problem did seem to be the 2G/3G/4G (Auto) setting in the mobile networks tab. I set it to 2G only and the problem is fixed. Not ideal, but at least I know know what caused it.
For the Dutch people (Or the people with google translate) this is the thread about it:
Thanks for your information on this problem. I also had this issue with my Samsung Galaxy S6. It turns out Google Play Services was draining my battery at an alarming rate. The solution that worked for me was to remove a couple of Google Accounts that were chronically unable to sync.
Settings -> Cloud and accounts -> Accounts -> Google -> choose the account to delete -> tap thethree dots menu in the top right -> Remove account
On my S6 it is the same problem. I have found that the issue occures when the mobile network is switched on, that starts the draining of the battery. If I switch to slower connection 3G or 2G the drain goes down in the same way (maybe that is what it means; 2G is 2x draining, 3G ix 3x draining and 4G is 4x and maximum draining 😄 ).
I am quite sure that it is some software update that has caused this, because it was not a behaviour in at least the first year since I bought the phone.
It would be nice to find a solution to this, because that would mean that the mobile network could be switched on all the time. As of now I only switch it on when I want to use it.