Surface Book Battery Life - what are you getting

After February 17 update, 

3 hours 15 minutes Clipboard 

13 hours 7 minutes Laptop

Promoted? I know nothing of that. Heh.

I let my display turn off on battery and plugged in, and I didn't change that to do the test/recalibration.

You really just need to disable the automatic sleep to do this - as long as it's running it'll sip power from the battery.

Are you sure it's hibernating? Or is it just sleeping? Hibernation means it transfers the RAM content to disk and shuts down, with a flag in the BIOS/OS to restore on startup. So hibernate shouldn't use any power. Sleep, on the other hand, keeps the memory alive by using a little power, so 1 or 2% an hour sounds about right.

First and foremost, how do I get promoted content like that :)

what did you do with your display overnight, did it turn off or did you leave it on?  Sleep never, hard drive never, what about eh display and what percentage is the brightness at on your display?

Mine is definitely draining. It is even draining when in hibernate mode. I'll post screen shots shortly. But it seems to be losing 1% per 30 minutes in hibernate mode.  2% an hour.  Something is not right here.

I'd like to do what you're suggest. what are you getting?

Yeah I've got 5 hours consistently on the laptop with some web browsing / excel / one note. I think I got a dud, has anyone gone through the warranty process with the battery?

As an update for you BBold:

First, I've never gotten great battery life, and I have the sleep problem, so my unit is not some miracle exception.

Today at the coffee shop coming off a fresh reboot I only opened Drawboard PDF, Outlook, mysms texting app, and OneNote, and detached at 100% on both. The battery drained linearly and I was at 24% of the CLIPBOARD after 3 hours flat. This is the best I've ever gotten, and seems it lived up to the billing by MS. I think the key is that my fan never turned on, especially since I never opened a browser. I had WiFi ON, location off, bluetooth on, power saver on, brightness 50%. CPU was typically operating at 4-9%, RAM at ~4 GB. I was basically just reading and annotating a PDF with the Pen the whole time. 

When I re-attached, my keyboard was still at 100% and the calculated total battery was 80%. This makes sense since 1/4 of the battery was at 1/4 capacity (screen), and 3/4 of the battery (keyboard) was at 100%. So if you projected this out (multiply by 5) I could theoretically get 15 hours total at this drain rate. 

Now, in practice in full laptop work mode, I tend to get 6-7 hours, or ~4-5 if I don't hold back. So I think that:

1. The clipboard will drain much more slowly when detached due to the inherent connection power leakage (hopefully they fix)
2. The battery really is capable of the 12 hour performance but with very limited actual function. The professional reviewers got 12 hours but they only had one video player program open with no other interaction. 
3. The real key is to keep the fan off by keeping the CPU usage low. 

I would encourage you to try the actual simple video playing drain test, or else the limited programs open detached like I did to see if your unit is actually defective or if it's just a case of MS stating the "best case scenario" battery life and misleading us, which you may or may not want to deal with.