Zenfone 5z fast battery drain

After recent fota update ,zenfone 5z battery is draining very quickly like I am getting only 5 hr backup with normal usage.
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After recent fota update ,zenfone 5z battery is draining very quickly like I am getting only 5 hr backup with normal usage.
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Hi, we'd request you follow the below steps:
1. Clear system cache.
2. Try the same under safe mode:
Hold the power button for 5 seconds => When the screen flashes with option => Press & hold power option => You will get an option to restart in safe mode
3. If still you face the issue
factory reset your phone after taking a full backup : https://www.asus.com/support/FAQ/1006346/
4. Last option would be to visit
the service center to have a check. Locate here:
https://www.asus.com/in/support/Service-Center/India
I have the same problem. Is your phone also hot? I checked and 4 of my cpu cores are running max power all the time.
How to check cpu cores running