Sony Xperia Z5 screen on time bad?

[Cmb6062]

Have had my sony xperia z5 for about a month now and since i got it battery life has almost not lasted a full day. 

the first day it drained out in about 6-7hrs.

I use auto brightness and it is usually quite low brightness, and i still only get about 2-3 hours of screen on time, never gotten over 3. I do not use my phone that much either, it just drains quick when i first use it.  

is there a problem with my battery?

[Cmb6062]

[Uliwooly · Accepted solution]

@Cmb6062

As you can see the mobile network coverage its terrible plus WiFi on all the time. 

[Tim77]

Screen on time

[Cmb6062]

it drops SO fast when i start using it, does not feel like 2hr50min, its like 1hr minimun, its also terrible signal too, anywhere i go its always terrible, have had this phone for almost 6 months now. enjoying the power but not the battery life...

(terrible signal with mobile network)

http://imgur.com/a/g2hD2 

[Uliwooly]

@Cmb6062

As you can see the WiFi it's on all the time and you have terrible network coverage, which will drain the battery really fast, there's nothing wrong with your phone.