Sony Android mobile battery drain

I started using my first phone which was Nokia 6151 (3 years life) then I moved on to Samsung Monte (2 and half years life). 

When I got my first job I got myself Sony Experia E (1 year life) to use whats-app and fell in love with the camera but as it was running out of space I had to get another Sony product Sony Experia T3 (2 and half years life) but the Sony Experia XA Ultra has been the worst phone I have ever owned in terms of battery life. It dies in the standby mode and I have to use separate alarm clock as my mobile phone dies in matter of 1 hour if not charged. I normally miss calls and alarm in the morning as my phone dies.

Hilarious, right? that's what my work colleagues and friends tell me when my phone dies. Worst when traveling, the 3G/4G cell tower search drains the battery in 30 mins just like the guaranteed pizza delivery. I think it's not enough tip.

I have uninstalled unwanted apps.

I have tried testing by switching off WiFi, Mobile data and Bluetooth even if it affects my NFC enabled Sony Smart band SWR10. Hardly adds up to the phone battery life when social media apps like Facebook are running in the background.

I don't know what's wrong I am carrying my charger and Sony power bank everywhere so that I don't run out of battery.

Please fix this phone battery drain issue as soon as possible Sony but meanwhile I have taken some steps.

Update 1:

Switched to 'Battery Saving' mode for location and switched off scanning.
I have disabled Smart Cleaner as one of the Sony community member suggested.

Even clean master app is disabled. (Tried it month ago takes out annoying ads on home screen in locked screen mode.)

Update 2:

Went to settings - Wi-Fi - Pressed the three vertical dots on top right corner - settings - turn off 'Network notification' ( Notify whenever a public network is available)

Update 3:

Removed unnecessary shortcuts from the home tab.

Update 4: (Optional change)

Switched from Live wallpaper to solid wallpaper (Black)

*Update 5 (13th Jan, 2017):

Despite making the above changes I realized around 3AM to 6AM every night the phone makes some kind of systematic update which drains the battery enough to make the phone run out of battery.

I have switched off Google play store auto updates in the settings > Auto-update apps to "Do not auto-update apps". 

I also made sure App updates available notification is checked.

The battery usage meter shows Cell standby as the maximum battery consumer in use since last charged.

Mobile radio active: https://www.google.co.in/search?q=mobile+radio+active

Update 6:
Some more updates.

 I contacted the Sony India helpline.

They suggested me to reboot to safe mode and to check if the phone was still losing battery.

If so, then I was advised to reinstall the Android phone OS software via PC companion software via repair mode by following the instructions which worked with internet.

As per their justification it could be a third party application draining power or previous OS upgrade went wrong.

I backed up necessary contacts and other data.

Post installation, I noticed the Google search box in the home screen and some graphics related problem was fixed.

For added performance improvement. I have switched off location. I only use it when required. I turn it on and off in the settings.

I will update if the battery life gets sorted.

Update - 19/01/2017:

My phone battery is not draining. After doing the above steps. I have made sure to use location only when needed.

If an app requests for location like Instagram, Facebook, twitter, uber, etc.

I turn my location on and off. It is now giving battery life for 12 hours + depending on my usage.