Battery drain

[sinny]

Hello. There used to be days when my T3 would lie idle and the battery would last 3-4 or even 5 days. Now, out of the blue it goes from 100% to 75% in just 9 hours and to 10% in 20 hours of just doing literally nothing. I have bluetooth, wi-fi and everything but sounds turned off all the time and yet, the battery acts as if the Internet was on which is weird. My android version is 4.4.2, 18.1.A.1.21. 27% of the battery is used by the OS, 22% also by the OS, next is just telephone with 12% and the screen with 10%. I have just two apps installed from the Google Play, Blizzard Authenticator which doesn't even use the battery since I rarely use it and 9gag which happens to consume about 4%. It's also not about Google Play services as it's not even mentioned in my battery usage (it's version is 6.7.76 by the way).

[Phy]

Take a look at the FAQ About problems with abnormal battery http://talk.sonymobile.com/t5/FAQ/Facing-problems-with-abnormal-battery-and-shutdown/m-p/320375#U320...

[Uliwooly]

Check this out

Google plus > menu > auto backup > is it on or off? 

Playstore > swipe left to right > auto update apps, is it on or off?

[EllePi]

No problems here with my T3.

Have you got any applications running in background?

[sinny]

No apps running in the background. I've got just 3 apps downloaded, 9gag, 9chat and Facebook Messenger and I always make sure they are off whilst I am not using them or when the phone just lise on the shelf. I even tried with STAMINA mode on and it is all the same, it went down from 100% to 80% in just 5 hours of lying idle. None of the tips from the provided link helped me. I've done hard reset, no results. It all strarted just like that, it was working for 4 days and the phone turned off. I had charged it and turned it on and from that moment my battery lasts maximally 44hours even without using the phone as I have mentioned in my first post.

[Uliwooly]

Facebook and facebook messenger are known for battery hogs.

Under Stamina mode, have you excluded those 3 apps? 

[sinny]

Nope, I haven't. Everything's blocked. Besides, before the day it all started I could even go asleep with my Internet on and lose a maximum of 3-4% of battery. Now, with everything turned off it's about 20%. 

[Uliwooly]

You could repair your phone with PCC

PC Companion (PCC)

Bridge (for Mac)

Alternatives on How to backup Xperias

http://talk.sonymobile.com/thread/36355

[sinny]

I did the repair thing and it didn't help at all. Charged my phone to 100%, turned off everything including sounds and even set brightness to the lowest possible and there we go, 80% in the morning, after 6 hours of nothing. My grandma has an Alcatel C7 POP with 1900 mAh battery, she's got lots of photo apps and some games and fun apps, she browses the Internet pretty often and her smartphone's battery lasts for 2 to 3 days! Mine gets 50% after 15 hours and I have no apps other than the preinstalled ones at the moment. 

[Phy]

@sinny

How is your battery life so far?