Poor battery life after last update

Hello! I got my Z3 in March and when I got it I loved its long battery life. I'm a very heavy user of my phone and managed to get 8 hours of screen on time out of it in between charges. I'm not sure if it has been gradual or sudden but I've noticed that lately, the battery life on my phone only lasts for about 3 hours of screen on time. I use my phone for the same things as I did when I first got it.
When I got my phone it was preinstalled with 4.4.4, I got the 5.0.2 update in mid-april and I got the 5.1.1 update a few days ago.
Here's some screenshots of my battery usage. http://m.imgur.com/JWe4Bt4,ybDx4wq
Also, I have quite a good knowledge of how android works and what can drain battery etc.
When I got 8 hours of screen on time when I first got it I was running google now and google fit (step tracker) and I stopped using those when my battery life started getting worse.
Please help! Thanks.
Jack

Hi @Redindian
You can try boot your device on safe mode like this to see if the issue persists:
http://talk.sonymobile.com/t5/FAQ/How-to-boot-your-phone-into-safe-mode/m-p/348008#U348008 Check this link too: http://support.sonymobile.com/global-en/xperiaz3/faq/My-battery-runs-flat-too-fast/
Also I suggest you to first run a backup of the device information like this:
http://talk.sonymobile.com/t5/FAQ/Backup-amp-Transfer/m-p/407253#U407253
Then try performing a system repair using PC Companion:
http://support.sonymobile.com/gb/tools/pc-companion/
This will factory reset your phone and erase all data. You might need tocharge your device for about 1-2 hours before so the device has at least 80% battery. Make sure the device is not connected to computer or laptop and turned off (sometimes you have to press power button and volume up until the device vibrates 3 times or on some devices you have to press the small button near the SIM tray or on the back of the device). Start PC Companion and select Support zone then Update my phone/tablet then in Blue Repair my phone/tablet and follow the on screen instructions - When prompted connect your phone still switched off holding volume down or back button - This should start the repair or reformat process. If you are using Windows 8/8.1 or a 64bit operating system then adjust the settings for PC Companion and run in compatibility mode and chose Windows 7 or XP.
I hope can be useful and I'm at disposal for any question.
Best Regards,

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Sony
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D6603
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Mobile 3/4g and WiFi
Skype v. 5.4.0.4165
Attachments:
Screenshot_2015-06-09-12-38-28.jpg ‏351 KB

Hello, skypeisawfull-,
Thanks for submitting feedback about the battery life of Skype for Android. The developers of the app are making great strides to improve the functionality and other aspects, including battery life, so that it runs better for its users!
Skype, by nature, does use more battery than many other apps. It should be understood that it has to constantly contact Skype's servers in order to receive incoming call, chat and contact data. You can reduce the amount of battery usage by closing some other apps that you do not use, reducing screen use time, ensuring that you are in areas with good reception (because cell standby greatly reduces battery) and rebooting the phone after a day or two can make a difference in your battery life.
Remember that the development team has surely made it a priority to make the app consume less battery and kill off the bugs that cause that. They probably have more in store, so just you wait and see! Things could be looking good! With you posting this, they'll take notice and probably work to reduce that 26% usage to something lower in later updates!
Thanks for the feedback - keep 'em coming!
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Donating time to help you here with your Skype needs.
If I've answered your question, feel free to "Kudo" me!

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Sounds more like an app stuck processing that shouldn't be....does happen from time to time. Behing hot means it is constantly processing.
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Sounds more like an app stuck processing that shouldn't be....does happen from time to time. Behing hot means it is constantly processing.
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