surface book battery drain while shut down

Mine's definitely fixed. This drain has been one of two big issues I have with the SB since buying it in November. I only rarely use my SB in the evening. As a result I routinely shut it down at 5pm and boot it at 8:30am the following morning. One battery is always at 92-93% and the other at 100%. Over a weekend its usually around 85% on BOTH batteries on Monday morning. After this president's day long weekend my SB was at 75% on BOTH batteries. This drain occurred powered off from 100% at 5pm on Friday to 8:30am on Tuesday. 

I know there has been some mild debate in this thread regarding whether this is acceptable or not. Personally I find this incredibly unacceptable. It was stated at the press announcement ON STAGE that this device would not have any drain when powered off. It was one of the reasons I bought it. I should be able to shut down my laptop on a Friday and boot it the following Tuesday after a long weekend and have confidence the battery will be at the same or NEAR the same level of charge. I shouldn't have to remember to take it out of my bag the night before and top it off to 100% after sitting OFF in my bag for 3  days.

Anyways, I came pretty close to marching this thing into Best Buy on Tuesday evening after it draining so bad over the weekend and demanding a refund. Instead on Wednesday I decided to do a complete fresh reinstall from a USB image rather than just a Reset. After it was complete I received this update almost immediately. I shut my laptop down around 5:30 on Wednesday evening and Thursday morning it was at 100%. Last night (Thursday) I made sure it was charged and disconnected it and left it on my desk at 5pm in hibernate. This morning at 8:30am it read 100% and I verified the mWh are basically unchanged using Nirsoft's BatteryInfoView.

For me, the issue is confirmed to be fixed. I'm not sure what advice there is for anyone still experiencing it.

I bought surfacebook 7 days ago. Before the newest update, my SB's battery would loss 10% per day when shutdown. But after the update, it only drain 2% per day. It didn't fully fix for me.

So after applying the latest update from yesterday and shutting down my SB at 100%, I finally booted up my SB about an hour or two ago and it stayed at 100%. Seems to have improved so far. 

I installed the Feb 17 update yesterday and shut down in the early evening and booted up around 8:30 this morning.  Both batteries were at 100% unlike before.  Will continue to monitor over the next few days to see if this continues to work.

Ok.  Sorry took me so long to get back.  I got back with support and they had me do a two button reset, re boot, let discharge, fully charge.  Did this on Feb 12.   I turned on 25 hours later.  Battery one was 100%, battery 2 was 88%.

Told them it didn't work, and they suggested replacement.  Then last week the system update came out with some other updates.  I applied the updates, discharged, recharged and shut down.  a day later both batteries at 100%.  It may be resolved, I will let you know after a couple added cycles.  JC

After the 2/17/16 firmware updates, my surface book now only loses 1% to 2% every 24 hours when in hibernate.  This is way better than the 5% per 24 hours I was losing before.  I've tested it on 4 occasions so far.

I'm cautiously optimistic and will continue to keep an eye on it, but so far, MUCH better.  I haven't tested it completely shut down yet, but since it is better in hibernate, I'm guessing it will also do well shutdown now.

I didn't do anything else to get this improvement, just installed the 2/17/16 firmware update.