Surface Pro 4 battery drain while OFF

I've disabled Connected Standby, Quick Start-Up, running my i7 processor at 50% maximum speed (to keep the device cooler and reducing battery stress), hard reset, OS reinstall, and recently even enabling Battery Limit to prevent charging more than 50% to see if it would help with the battery drain when it's shut down completely.

None of the steps I've taken work. I get a 10-15% phantom drain each night on a complete shutdown.

I had no useful assistance with my Surface Hub problems as well - frequent disconnections from LAN and USB devices including keyboard and mouse, reducing the Surface Hub to just simply being a Display Port connector for my screen (and only just non-4K monitor

• plug two screens in and I run into issues).

It's only been 18 months since I bought the Surface Pro 4, and I'm tired of struggling with the various issues. It got to the point where I don't feel comfortable selling my Surface Pro 4 and Surface Hubs (got a replacement from Microsoft, but it has exactly the same problems), as I don't want to have to deal with any potential fallout from the would-be buyer.

A very expensive lesson learned. Stay away.

As already posted , I was experiencing the  problem of battery drain at rate of 14 to 18 % per day ( average of a week ) in full shutdown condition. I have tried all the tweaks in settings , registry , full shutdown methods etc but it could not be corrected. 

Then , I had sent it to Microsoft service centre at Kolkata (india) by taking lot of pain but they considered the complaint as not charging (I do not know , how any one can understand like that even after clear description of problem )

They returned it back , closing the complaint as attended as there is no defect of not charging and It took 9 months.

Again,  I have sent it back to repair with explaining past experience and the problem at different options (this time I have  put the problem at others section ). Further i stuck a paper at the back side of surface explaining the problem,

It took around 20 days  from pickup to return. They have swapped it with another surface pro 4, i5 , Intel , windows 10 pro (But its hinge of kick stand is of different design) , physically inspected the replacement and found to be in mint condition (or new ). The best part is that it exceeded the expectation as its battery drain is surprisingly less than 1%  per week just in shutdown condition (no tweaks , no registry hacks , no full shutdown but just as received condition) and approx 3% battery consumption per day in sleep condition , this is  pretty comparable to  my android phones (blackberry keyone or redmi note 4 or lenovo android tablet )

However In my case you might have noticed that  the problem was there from the day one of purchase. How it can pass quality certification?when it designed compete android tablet. I have purchased brand new (sealed)abut now ended  up with a  refurbished ( or new  unknown )

It is also pertaining  to mention that 1year, 5 month  out of 2 years warranty is consumed without using it.

I wish  Microsoft ensures that  whatever has happened to me  will not happen to others by ensuring quality

Regards

Last news regarding my claim about this battery drain defect.

I received a call, yesterday from an MS representative and, guess what, Microsoft does not give a sh.. About this problem.

No replacement solution except for the same device (in my case at least 3 replacement without any amelioration.

After the smartphone abandon and this particular Surface case, my recommendation, as an it professional, DO NOT BUY a Microsoft product. 

I would recommend, all of you, to widely communicate about it (social network for example, maybe microsoft deign to react !