But.. the battery isn't wear, decrease 16000 mWh in one night?? Impossible, I has seen exactly same cases on Reddit, decrease from 52000mWh to 34000mWh. Btw ec reset doesn't help
Battery degradation is an on going process, from the first press of that power button and onwards, your battery will degrade.
I have 6 MSI laptops ALL with the original battery, as soon as I receive my laptop I update Windows, drivers, install CPUID HWmonitor and take note if degradation is visible.
I then do a battery calibration, that is a maintenance utility and not a repair utility, then I monitor on a weekly basis my battery to see if there is an acceleration of the degradation process.
In some cases like in example my GE72 and GS65, that they are often on AC power or @ 60% or 80% like my GS65, the process seems to accelerate, so I reduce to 2 months the calibration.
GE66 2%, GS65 23%, P65 11%, GE72 26%, PS63 8% and GL62M 18%, as you see degradation is present in all my laptops, but only the GS65 and GE72 have a noticeable reduction of usability.
ALL my laptops have a battery calibration every 2-3 months and I clean out the fans, keyboard every 6 months.
Once the battery wear goes over 30%, you will see a significant reduction in usability of the battery, but it will still function.
MY X556UQ purchased in 2016 is at 31% wear and I struggle to get 50-60% of the autonomy but it still works and is the first battery in it.
My C650 purchased in 2011 is at 38% wear and I struggle to get 40-50% of the autonomy but it still works and is the second battery in it.
My D630 purchased in 2009 is at 43% wear and I struggle to get 30-40% of the autonomy but it still works and is the second battery in it.
Nothing happens overnight, you just realised this when you changed plan and if you would have had CPUID HWmonitor installed day one, you could have forseen this!
www.cpuid.com
us.msi.com
