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Recently, I noticed that my phone overheats for no reason even when it is on standby and the battery was draining more than usual. I've checked the power manager and found out that Google Play service is draining up the battery more than the screen. My Xperia Z3 Dual (D6633) is running 5.0.2 and the Google play service is 7.5.71
Hi stockyvillage have you tried turning off auto-sync under your main settings menu, auto-backup under Settings > Backup & Restore and also turning off auto-updates by going into Update Centre > Settings? If not please try this - keep us updated.
I understand stockyvillage, see how it goes with those functions turned off & report back. Have you considered running a software repair on your handset also? As running a software repair is likely to smoothen out the new operating system for you.
@SophiaW.Here are the latest screen shots with the sync backup even WiFi disabled.Basically made no difference.