I was testing out some batt life of the premium
I have found several things
but first the SOT

3 hrs 51 mins... pathetic right?
well this SOT is over approx 1.5 days usage

below is the analysis of the graph

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from 100% to Line 1
- Midnite start ~2am, Auto DND 0.30-7.00am, alarm only
- Drop 1% in this time frame
- @ Line 1 indicate when I enter my workplace
Line 1-2
- From 8.30am to Lunch time, approx 12pm
- Wifi is okay, but phone line is like sh!t
- Drop 15% or more at 4 hrs time
Line 2-3
- Lunch time to ~6pm
- Phone goes airplane mode, Wifi left turned on
- Drops reduced 2% in this time frame
Line 3-4
- Go back time, turn back on radio signal
- Line 4 indiccate I go out to badminton
- Home line not exactly stellar, but have stable constant connection
Line 4-5
- Green bar indicate I am at the badminton court, good signal
- The the yellow indicate i was at home ~930pm until ~11.30pm
- Up until now, the phone screen usage is minimal
Line 5-6
- Normal usage until ~2am
- Typical drop off approx 30%
- Wifi and awake some time after screen turn off (IRC, music playing ~25mins after screen off)
Line 6-7
- Total sleep
- Another drop off ~1-2%
Line 7-8
- Be in factory again for the next day
- weak ass signal at play here
Line 8-end
- start surfing imgur with wifi, radio signal off (airplane mode)
- stop to take screenie at 3%
from this, I can deduce that for me, wifi turn off when screen is off is effective for me
(Hotlink signal, butterworth, penang)
but once I enter the factory, where the signal suffers tremendously
my battery life suffers as well
proven that in airplane mode with wifi on, the drop off is controlled
this is all included with Data LTE connection turn on
and if I am at a place with good signal
the battery drop off while turned of should be contained
Those that rely on wifi for the connection only
this would not be suitable, since my setup enable me to receive message through data when the wifi/screen is turn off while sleep (i hope)
and then I found out the 2nd more important point...
Pardon me if some one already mention this
Ladies and Gentleman, the screen shot size and dimension before and after the updates

IT IS FREAKING 4K on the screenies,
which it might means that the screenies is upscale to that size
or
or...
or....
THE WHOLE SYSTEM IS RUNNING
4 FREAKING
K NOW!!!