[TRACKING] High Battery Drain During Suspend

[Second_Coming]

@James_Jarrett

Roughly, assuming percentages are correct and my battery’s 55 Wh,

• deep sleep with USB-A drains around 3.3% battery / hour, or 1.8 watts
• deep sleep without USB-A drains around 0.95% battery / hour, or 0.5 watts
• s2idle sleep with USB-A drains 1.8% battery / hour, or about 1 watt
• s2idle sleep without USB-A drains 1.6% battery / hour, or 0.9 watts

Your numbers are within margin of error with the rest of the community with the 11th gen. Any non-USB-C card seems to drain the battery.

I assume you’ve seen this:

[TRACKING] Test results for standby battery use of Expansion Cards

After first testing each expansion card’s power usage at runtime — part of my in-depth review — I have finally gone around doing a similar set of tests on standby. TL;DR: everything but USB-C take power, USB-A and DisplayPort take a lot more than they logically should. Here is a summary of those results. Device Wattage Amperage Days Note baseline 0.25W 16mA 9 sleep=deep nvme.noacpi=1 s2idle 0.29W 18.9mA ~7 sleep=s2idle nvme.noacpi=1 normal nvme 0.31W 20mA ~7 sleep=s2idle without…

and this:

High Battery Drain During Suspend (Windows edition)

I’m seeing higher-than-expected power draw during sleep in Windows. I put it to sleep (fading power button LED) for 6 hours and the battery level dropped about 33%, which seems very high at 5.5%/h. Comparing this to my X1 Carbon which drops by ~0.6%/h (57Wh capacity). Both are using modern standby I presume, and I’ve configurd both to not hibernate. Folks on Linux seem to be seeing similar drain rates. Is this something that can be improved in firmware? How should I troubleshoot this? I disabl…

Best case is with full usb-C cards only. Draining around 0.3w…but still rather far off from other competition of the same period (11th gen):

High Battery Drain During Suspend (Windows edition)

My tiger lake spectre 13 lasts for 15 hours before draining 5% of battery. My latitude 7420 lasts 10 hours. In my 13 hour workday if I open my laptop four or five times over that span potentially 20-25% of my battery would be consumed just from it being asleep (or rather, in modern standby), wheras other tiger lake laptops demonstrate that you can achieve that same kind of workday only losing a few percent to modern standby. Clearly further optimization needs to be done. EDIT: Decided to check…