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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
click on the graph to expand it.
that is not actually not bad, considering you have the wifi on all the time. you've got a whole day and bit more. you wont necessarily get the 2 days battery life as this is been done in a lab with set parameters (i.e 1 hour call 1 hour browsing etc.)
again try to read the posts dealing with this problem. and you can search google on how to read your battery usage graph
try to fully charge your battery to 100% and use normally until 15%
go to settings>battery usage> take a screenshot of the apps listed
click on the graph and take another screenshot and upload here in the forum
https://www.androidpit.com/how-to-calibrate-the-battery-on-your-android-device
or perform software repair using PC Companion
is that how you normally use your phone? i must say you are a moderate if not heavy, your wifi is on all the time and so is your screen. i forgot to say that you take a screen shot of the screen on the apps listed, but i reckon you have almost 3 hours of screen on time. and that is already good as it is.
if you are not satisfied with the battery performance then perform software repair using PC Companion or send your device to your local service center Local support
Don't create duplicate posts, and yes it is fine, your phone was awake quite a bit of time and the WiFi it's on all the time, that plus the fact that the phone its more than 2 years old, which means that the battery can't hold charge as good as it used to.