Surface Book Battery Life - what are you getting

I picked up my SB first thing Monday morning the 26th at 10:00 AM.  I've been using it literally non-stop ever since.  I've only had it on battery a few times for only a couple of hours at a time.   I'm a night owl and decided to do a test as I was working last night about an hour before I slept.  I did lots of looking and note taking in OneNote.

Went on battery at 1:18 AM Oct 30.

Noted that screen dimmed the moment charging cord removed.

Brightness is at 60% for the entire test.

95% 7 hours 45 minutes remaining 1:42 AM

90% 7 hours 19 minutes remaining 2:00 AM

83% 6 hours 33 minutes remaining 2:31 AM

(Shutting the lid and going to bed.  Will check battery in the AM.)

58% 3 hours 45 minutes remaining 5:33 AM

 52% 6:00 AM (remaining time not displayed)

47% 3 hours 20 minutes remaining 6:18 AM

(Display Driver has stopped and restarted) 6:27 AM

43% 2 hours 44 minutes remaining 6:32 AM

34% 2 hours 40 minutes remaining 7:09 AM

29% 1 hour 22 minutes remaining 7:31 AM

20% 1 hour 31 minutes remaining 7:50 AM

(battery saver at 20% has turned on)

18% 55 minutes remaining 8:00 AM

15% 1 hour 1 minutes 8:10 AM

14% 26 minutes 8:12 AM

12% 23 minutes 8:20 AM

Just a little over 7 hours of battery.

Plugging in…

I didn't like the drop from 83% to 58% after sleeping for 3 hours and doing nothing other than putting the SB to sleep too.

I was looking forward to getting 12 hours of battery life like Panos said.  This is nothing close.  Disappointing.

I'm getting between 6-8hr. I use this at my job and do the same thing every day. Widi connection with one note open and nothing else.

About 6 hours. No more on three charges. Pathetic. Half of what they advertise.

But now it doesn't matter anymore, since the whole thing just died.....

4-5 hours, which is unacceptable. I'm hoping this is a software issue that will be fixed very soon.

i7 512gb 16gb ram dGPU