surface book battery drain while shut down

I wanted the dGPU model, too, since I work in Photoshop, Bridge and Lightroom for a Photoshop class I'm currently taking. As an amateur photographer, I don't want there to be any system lags, etc. However, after the 12/2 Hardware Update that apparently fixed the Intel HD Driver issues, now my Photoshop has disabled features like Perspective Warp that the video card assists with. I may have been better off with a Surface Pro 3, apparently.

Someone else reported that the 12/2 update disabled their Nvidia dGPU (you can look by going to Device Manager) but detaching and then reattaching the screen brought it back. Not sure if they have to do that every time as my SB isn't having that problem but give it a shot. It sounds like that is what may be happening to you.

To be fair, I don't think every model is exhibiting these behaviors, we just hear about all the 'bad stories' since we are looking in these forums for answers. I know more than a few people who have SB's who have NO ISSUES at all. So while I think battery life could be improved across the whole Surface line of products, I don't feel every user is experiencing the same level of battery drain that others are. I don't think mine will be resolved until I take the SB back to get it replaced in a couple of weeks. We'll see how that one fares under my same working conditions, which is pretty light.

Yes, I'm aware that my "weekend" expectation is...mmm...a bit unrealistic :-)

My point is that it's just unbelievable to me that something so glaringly wrong escaped testing.

I did another measurement test on my "good" SB. 45min of sleep took it down from 97.5% to 95.7%. The top felt warm all that time, never really cooled completely.

These numbers show a 1.7w consumption during sleep which should yield 41 theoretical hours of sleep on a full battery.

Eh, the Surfacebook launched on the 26th of October and since then there have been a few regular updates pushed out by Microsoft in a span of less than a month and half - so all in all, they're doing a pretty good job of supporting their product and providing fixes in a timely manner. Sometimes it takes time to find the causes of these things. 

Does it mean they'll work over the weekend? No, but they are actively looking in to things and addressing them.

Yes, so what I take from that is: you have a good system, I have a faulty one.  Mine is a SB i5 256GB 8 GB ram dGPU model. After a complete overnight shutdown, mine loses 15-20% consistently and only lasts 6 hrs max with light use and battery saver on.

I'm only reporting my experience. The takeaway has to be that there are some Surface Books that do what they are advertised to do.

Depending on how much Lightroom/Photoshop and Visual Studio 2015 work I'm doing, I've gotten anywhere from a low of 8 hours to a high of more than 12 hours of battery life.

I put in my order for mine the next morning after watching Panos Panay introduce the Surface Book at the Microsoft Hardware event.  I was sold hook-line-and-sinker.  I was at my Atlanta Microsoft Store the next morning and they had a Surface Book on demo.  I spent a little time with it and I had to have one.

I have experienced most of the trials and tribulations that have gone with being an early adopter.  But at this point I'm quite pleased with how my Surface Book is working.  I wouldn't give it up.