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2018-07-06 09:54 AM
Mine was also draining fast. After a couple of settings it s a lot better . First i disable the movie creator at the app menu.
Second, at the settings menu just below flight mode, there s an nfc function, it allows to exchange data with other devices when it "touches", anyway turned it off. So far so good .
Hope it helps
2018-07-20 11:29 AM
I had exactly the same issues with battery drain after performing each update separately and cured it by doing the following.
1/ Backup data using Xperia Companion.
2/ Perform Software Repair
3/ Restore data.
I've also noted that poor network reception makes battery drain far worse. I have very little 4G in my area and by turning this off. With a combination of both actions the battery life has gone from about 4 hours to 18 hours!
2018-07-23 08:34 PM
Software repair didn't help me and I've tried it several times.
In the meantime I found out that location (combined with Google Play Services) causes bluetooth to drain battery even when bluetooth scaning is off. So the solution is to have smart phone and make it dumb again (by disabling all the "smart" features) to have less than average battery life.
2019-04-11 01:08 AM
Intall Xperia Companion on your computer and perform a software repair on your phone. If you get any installation errors, search YouTube for tutorials about solving them. I did it and my phone now works perfectly.