I have the same exact problem. The battery drains while the device is shut off. Sadly, I just realized and now I have to Warranty and Microsoft store told me all they can do is to charge me CAD810 and give me a refurbished device!!!!! What should I do?  overnight but most coming from Battery 2. I guess I should be glad. I actually try different methods of shut down each time, recording the % of batt. life and then record the next morning, etc... I have tried nearly EVERYTHING I have read and have performed every "trick" aforementioned in this thread. I will try to contact Microsoft Support soon and maybe they will have a solution. I really hope they don't offer a replacement as I have customized my SB2 to be my "Dream Machine" since I waited so long to get one. Regardless, I'll keep everyone posted.
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Anonymous
2020-01-01T18:51:17+00:00 Same problem here (a few months old). Battery appears to be constantly draining.
I have also never got anything close to the 17hrs of lifetime that was advertised which is really disappointing and was actually the major reason I forked out for the highest end Surface book 2 in the first place.
Tried to reinstall windows but it's made no difference. Whilst I get ~10hrs of on-time from a clean install of windows that's sitting idle in battery saver mode I too am draining when the device is off and not even in use (~10%/day). It's completely unacceptable.
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Anonymous
2019-12-15T19:54:33+00:00 Yes, the drain is a result of the detach function. I cannot remember where I read it, and I don’t think Microsoft has officially announced it either, but it seems to be “officially” the cause.
It won’t be fixed either. Microsoft ignore threads like these.
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Anonymous
2019-12-15T19:13:40+00:00 Hi,
Welcome to the club :(
There is no solution I’m sorry to say. It seems to be a “feature” of the SB.