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I have Xperia z1 I bought it from 8 months the problem is the first 10% is draining at 5 minutes and the battery isn't last for 4 hours
did you purchased this phone new or used ? the phone was released 3 years ago, most likely you need a new battery, but
We'll need more info to better assist you
charge the phone 100% use it as you normally would then once the battery reaches 10%
settings > battery > take screenshots of:
1. the list
2. tap on the graph and take a screenshot
3. back > tap on the top 4 items on the list > take a screenshot of each
post them all here or upload the screenshots to box or dropbox or google drive or etc and post the link
It seems normal, the screen was on for more than 3 hours plus WiFi was on. You could disable the Bravia Engine, keep in mind that some apps will drain your battery faster such as, facebook, whatsapp, games.