High battery drain during Modern Standby sleep, no obvious culprit

S0 is an idle condition. ["S0 Modern standby" is also called "S0 Low power idle"]
It only transitions to a deeper state after quite some time. I don't think that any of the MS documents I've read on the subject say how long that takes.

Your data seems to suggest that you used up 22% of your battery power in 12 hours. It seems to me that this is pretty good for idling.

All the best,
Denis

It is much lower in energy consumption than a fully running computer.
It is lower than an equivalent idling computer that does not have S0.
It is not lower than S3.

I've never seen that 'certification standard' but would be interested in reading about it. Do you have a link to it?
Is it, possibly, a standard required for individual hardware components rather than a standard that applies to the whole system?

When you tell it to sleep [or, in fact, whenever your power options turn off your display, the computer enters S0 Modern standby.
S0 Modern standby gradually inhibits more and more running functions and eventually achieves what the S0 Modern standby policy documents refer to as 'sleep' [no relation to S3].
Since you seem to be interested, I'll dig out and post a link to the MS document that describes these states.
What is Modern Standby - MSLearn
Modern standby SleepStudy - MSLearn
Modern Standby states - MSLearn
Modern Standby vs S3 - MSDocs


Personally, I disliked S0 intensely and disabled it.
Many people have found that disabling S0 automatically enables S3 Sleep. Unfortunately, I did not so I am stuck with the choices of either running or hibernating. To me, this still beats S0.
Disable Modern Standby in Windows 10 and Windows 11 - ElevenForumTutorials
But if S0 suits you, as it does others, then fine.

Denis

I found that I did have a document stating the certification standard after all. Well, recommendation.

MS said:

Power/performance targets
The requirements for each system are dictated by the target market, workload, and form factor. OEMs should do
their own modeling of their devices to determine the best power and performance targets.
Microsoft recommends the following performance goals:
500ms to resume from Standby.
5% battery rate of drain over 16 hours.

MS Design Windows 10 devices
My quote is from the 2018 version. It has just been updated [18th Nov 2022] & I haven't yet found the equivalent statement.



Denis

mc510 said:

I would gladly disable Modern Standby if possible; I have no need for any of its supposed benefits and it's just not working properly for me. However my understanding is that the regedit method no longer works. I would be very happy if there were a method that I could use to get S3 sleep!

The tutorial I linked to still works.
Disable Modern Standby in Windows 10 and Windows 11 - ElevenForumTutorials
I am not the only one who has used it.

There used to be a different Registry key involved [pre Version 2004?] and that no longer works.

Because the tutorial method is quick, easy & readily reversible you can try it and be secure in the knowledge that you can get back to where you started.
- Personally, I'd make a new system image before any major change so ought to suggest that to you.
- But, in this case, you can reverse the change so easily by using the re-enable section of the tutorial that it would not be completely foolhardy to omit the system image.

I hope you do find that S3 Sleep gets enabled by disabling S0.
- Almost everybody who posted about it found that S3 Sleep became available.
- I did not find that.
- I also have to disable then re-enable my WiFi adapter when resuming from hibernation now. I have a script to do that [for computers only containing a single network adapter or possibly only a single WiFi network adapter, I cannot remember]. Let me know if you want me to post it.
- It is easy to check the power states available to you before & after disabling S0. Just run the command PowerCfg -a to list them.



Best of luck,
Denis

mc510 said:

I would gladly disable Modern Standby if possible; I have no need for any of its supposed benefits and it's just not working properly for me. However my understanding is that the regedit method no longer works. I would be very happy if there were a method that I could use to get S3 sleep!

I take a different approach from Denis. Rather than trying to disable Modern Standby I adapted it to suit my needs.

I have two 'almost new' laptops. One supports Modern Standby, the other (cheaper) one doesn't.

While I cannot remove Modern Standby, I could tame it. To save on battery power I like all my laptops to sleep (or standby) on closing the lid, then hibernate after 20 minutes if I don't return to them.

My first step was to reduce power drain in modern Standby by disabling network connectivity in Modern Standby.

Enable or Disable Network Connectivity in Modern Standby in Windows 10

Next I set Hibernate after in Power Options. This setting is missing by default on a Modern Standby install of Windows 10/11, so first add it back.

Add or Remove Hibernate after from Power Options in Windows

Then I could make my Modern Standby laptop behave like all my other machines.

I'm both pleased for you and jealous of you [well, jealous of your S3].

And thanks for the rep,
All the best,
Denis