XPS 13 9370, battery drain in sleep mode

Go to dell.com, click Contact Us, click Technical Support.

I have the same issue. AFAIK The computer doesn’t sleep. It gets hot when I leave it in my bag.

With regards to transporting your PC, you must first turn the PC OFF. Under no circumstances should you leave a PC powered on and in some sleep/hibernate/standby mode when placed in a bag or backpack, or in an overhead bin. The PC will overheat as a result of this. Any resulting damage will not be covered by the Dell warranty.
DELL-Admin

I’ve reinstalled windows, updated all the drivers and BIOS and I’d rather sell the computer than use Dell support again.

Great hardware, poor driver software.  (Not windows’ fault).

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@Dull 9370 wrote:

That was not a helpful answer. We all know how to adjust the sleep and hibernate times and ofcourse we know sleep takes power.  

I have the same issue. AFAIK The computer doesn’t sleep. It gets hot when I leave it in my bag.  

I’ve reinstalled windows, updated all the drivers and BIOS and I’d rather sell the computer than use Dell support again.

Great hardware, poor driver software.  (Not windows’ fault) 

 

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You are correct, the 9370 does not sleep.  The three options are leaving it in low power mode, let it go into hibernation or shut it down.  In a video, Microsoft recommends setting it to go into hibernation after some time in low power mode, which is what I do. 

Leaving it in low power mode may allow something like a Bluetooth mouse to wake it up and cause it to get hot.  If you are running certain utilities, like Groove music, it will continue to play while in low power mode.  It should not get hot if it is actually in low power mode.  The sleep study report, if you do not have the system set to let Windows handle the Network connection, can be very helpful.

My system (9365) uses 1% per hour in low power mode and 0% in hibernation.  The situation does involve Windows since they are the ones which want the system to stay available during low power modes and built that same design into many of their Surface systems.

Same problem with my 9370 I5 quadcore.  It's dead overnight from a half charge starting point.

I've got Lenovo's that'll last a week in sleep mode.

And why does a boot from hibernate take so long?  Is there a BIOS option to change?

So new Win 10 machined support "modern standby" instead of sleep mode (cpu off, ram slow refresh).  In modern standby, a lot of stuff still runs, mail get refreshed, and wifi stays up.

Read more about these modern standy modes and maybe you can get the equivalent of old sleep mode.

Yes try looking up how to "disable Windows Connected Standby". 

Dell laptops used to have a BIOS option to force the old S3 Sleep instead of Modern Standby, but I hear it was removed in some recent BIOS versions. Partly because it also had issues which Dell wasn't successful in fixing (sleep has been plagued with bugs all along!!!). So they are happy following M$ guidance to remove S3 sleep altogether. Unfortunately CS appears to be even more troublesome. Mind that according to M$, a reinstall of Windows is required if you switch to S3 sleep.  

I had a similar issue,

running "powercfg.exe /SleepStudy" and studying the report shown "Unregistered Device \_SB.PCI0.RP09.PXSX" as main offender for power drains.

I updated the storage controller drivers with the samsung ones found here : 
https://s3.ap-northeast-2.amazonaws.com/global.semi.static/SAMSUNG_SSD_970_Driver_190125/7FD357322A6707A720E1A71EF11A3BE1EED819E011D317626415F0281A68833C/Samsung_NVM_Express_Driver_3.1.exe


This seems to have solved the issue with modern sleep power drain falling from 3000mw to just 283mw