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I have an issue with my Surface Pro 4 (Windows 10), and it's battery draining while in sleep mode for example yesterday I just let it sleep for the day, after 10 hrs of the surface just sitting there, it was really hot and the battery dropped from 91% to 49% and I noticed that it only happens when the bluetooth radio is ON, it's like the bluetooth adapter won't let windows 10 enter sleep mode.

So I did a sleep study, and I've found this...

Sleep Study

Event Viewer

Sleep study As you can see here the Bluetooth adapter is the main offender with over 10 hours of active time, but the only thing I have paired with it is the surface pen and it has less than a minute of active time, and I don't see any other device other than the USB root hub but as far as I understand that's the root where the Bluetooth is connected so it's not a hub I connected to the device.

Event Viewer And here you can see how the USB root is draining power while the system is idle and is skipped over and over again.


Currently I was dealing with this issue by manually toggling airplane mode every time I turned the screen off, but sometimes when I forget so the surface can't go to sleep. I pretty much have my surface without any registry modification for the power plans or anything, I just have some software to work with but I haven't messed with the OS like at all.

I was thinking maybe writing a script to automatically disable the Bluetooth adapter once the screen is off or toggle the airplane mode. I actually don't need any of this turned on while I have it on sleep mode so...

Any ideas?, Have you dealt with a similar issue before?, or even better does anyone know how to force windows to stop any offender and not skipping it over and over again?

Thank you in advance

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  • There are settings in Power Options for Wireless Adapter Settings to minimize power usage on battery, though I don't know if that applies to Bluetooth as well as WiFi, However, you might be better served by going from Sleep to Hibernate after a fixed time, since Hibernate uses no power. Mar 21, 2018 at 21:53
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    You might look into Suspending or Hibernating your system. Both are “better” power states than Sleep mode.
    – Ramhound
    Mar 22, 2018 at 0:21
  • @Ramhound after thinking it a lot I'm really leaning towards hibernating, but I'm still not clear with suspending, is that another state?, because I've only seen shut down, sleep and hibernate maybe I'm missing something? thank you in advance for your help.
    – Sarilainn
    Mar 22, 2018 at 0:42
  • Suspending moves all memory onto the disk. Hibernation is a hybrid power state. Previous commenter indicated Hibernation takes no power which isn’t entirely true: msdn.microsoft.com/en-us/library/windows/desktop/…
    – Ramhound
    Mar 22, 2018 at 0:50
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    @Ramhound, Hibernate uses no power -- see superuser.com/questions/561252/…. That said, even when turned off,"completely", Intel AT may continually check the network. Mar 22, 2018 at 6:34

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