Hibernated Surface Pro draining fast

[ochhanz]

Hi, I have a Surface Pro 1 and when I either hibernate or put it into sleep, the battery drains fast (~15% per night or such). This is not the case with shutdown. While I understand sleep that drains battery fast, why does hibernate?
I never seen this issue on other laptops when hibernated, so how to solve this Surface Pro issue?

Thanks for taking the time!

 

[ochhanz]

It seems that the problem is related to that it will not put the Surface entirely in hibernate mode, maybe because when I hibernate it and attach the keyboard I can see the backlight keys light up for a moment. Yesterday i waited a bit when attaching the keyboard and the device this seems to have been put in hibernate properly (the battery was drained only by 4%).

 

[Ryujingt3]

A similar thing happens on my Surface Pro 2. It doesn't fully hibernate if devices are attached. Ironically, later Surface Pro models (2017) also have issues with hibernation.