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In my case, I don't use a docking station or a wired ethernet connection. Furthermore, the battery drain happens regardless of whether or not the SP4 keyboard is attached.

I don't think it's an issue regarding which SS drive is in the unit. My Surface Pro 4 has a 256GB SS drive, and it has the very same battery drain issue.

Regarding the SP4 requiring energy to shut down, I can verify that this isn't an issue relating to this matter of the battery drainage. Yesterday, after using up the charge of the SP4 all the way down to 5%, I charged it all the way back up to 100%. From there, I performed a full shutdown...

To follow up on my prior post in which I shutdown my SP4 via the "shutdown /s/f /t 0" command (using UEFI firmware version 108.2318.769 8/14/2018), I mentioned that the battery charge was at 31% when I performed this full shutdown. 6 hours later, I powered on the SP4, and the battery charge was...

I'll try out this solution (shutdown /s /f/ /t 0). However, I can verify that even with this newer UEFI firmware version (108.2318.769 8/14/2018), if the SP4 is put into hibernation (not suspend but hibernation), with the SP4 off of the charger, the battery drain continues to occur, and that...

In case it should come up, I noticed that Microsoft released a firmware update for the Surface Pro 4 in which Microsoft states the following... Surface UEFI – Firmware 108.2318.769.0 improves battery stability for devices not in use. In light of the battery drainage issue that me and many...

This is a known issue with the Surface Pro 4 and has been reported by me as well as many others on Microsoft community support forums (one of the forums has a thread discussion that has lasted for a year so far). It's a hardware issue that Microsoft has demonstrated terrible support for. This...