Default [Q] I have doubt on my N7 stand by time

I have xperia z and this 1 month old N7 flo. And I feel that my N7's standby time is not as good as that of my XZ(yet I still haven't activated stamina mode on it). I use Clean ROM and ElementalX. May I ask you all about your N7's standby time? I attached my screenshot to allow comparison(it's 1day 16 hrs on battery with 2 hrs of screen on time)
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