surface book battery drain while shut down

This is getting OUT OF CONTROL!!!!!

I had my SB plugged in overnight with the Power OFF.  Not sleep or hibernate, OFF.

Left hotel at 7:30am and didn't touch the machine the entire day.  Didn't need to.

Back to the hotel.  6:30pm.  Battery is at 87%!!!!

How do you lose 13% battery in less than 12 hours being totally powered OFF.  This makes ZERO sense, but then again, this entire SB experience has been the worst I have ever dealt with EVER.  Worse than my Palm Pre.  Worse than my last Blackberry I ever owned.  Worse than my 1st iPhone. 

I will say this.  There is talk of class action lawsuit going around on other forums.  If something doesn't happen and happen soon, they will be paying dearly for this device that is half baked.  And it is HALF baked.

I didn't drop $400 on some crappy tablet, although it's starting to feel that way.  I dropped $2100 on a productivity device that has made me literally LESS productive than ever before. 

What an embarrassment.

So I decided to let my Surface Book hibernate from 3:00pm-11:30am. I lost only 2% on hibernate compared to it usually being 4-6% of battery life when my SB is completely shutdown for that period of time. I wonder why shut down is drawing more power.

I've noticed the same thing. I really do get the advertised 3 hours on just the tablet portion when I'm reading papers (with battery saver on), but plug the "9 hour" keyboard in and I only get 6 hours total. It seems like it has to do with the connectivity of the two pieces.

Also, the fact that I still have 100% battery overnight in hibernate, but land at ~96% if it's shut down, tells me that the "shut down drain" is not a natural effect of the battery self-discharging. 

(i7/16GB/dGPU)

For work, I keep a Lenovo Helix (similar form factor to Surface Book) at home to be able to log in remotely due to an emergency.  It's also on Windows 10.  Looking in the Event Log, it has been shutdown since 11/17/15.  I powered it on this morning, 1/5/16, and it was at 93% battery after a month and a half.

Battery 1 was at 96% (tablet)

Battery 2 was at 88% (keyboard)

Total was at 93%

It has the Fast Boot enabled, Hibernate is available but I had it shut down, not hibernated.

The only Windows 10 difference I see between this and my Surface Book is that Windows 10 on the Helix doesn't give the option "On battery power, stay connected to Wi-Fi while asleep" so I assume the hardware doesn't support that option.

I don't see how staying on wi-fi when asleep would affect the battery on the Surface Book when it is shut down, but still wanted to point out the difference.  However, when I disable this feature on the Surface Book, it still overly drains the battery when shutdown anyway, so seems unrelated.

The only time I see the Surface Book not overly drain the battery is when I have the tablet undocked from the keyboard.  Is the keyboard dock sucking battery from the tablet when it is shut down or hibernated?

I shut down the computer (I know the difference between shutdown and sleep...). I leave the USB Ethernet adapter that I bought from Microsoft plugged into the USB port on the Surface Book. There are no blinking light coming from the adapter as there are when the SB is turned on. I checked USB setting in Device Manager and there is a check beside "let the computer turn off this device to save power? and there is no check mark beside "let the computer use this device to wake the computer" I forget the actual wording. I leave the SB turned off for 2 or 3 days and when I turn it back on, half the battery is drained from the full charge present when I turned it off. (This was a test and I know there was a full charge to start). Is this normal behavior?