Yesterday I asked for a run time compare Windows 7, 8 vs Linux..
In the evening, I started a test with my old ASUS UL30a with an USB stick with Ubuntu 16 LTS.
It was easy to find:
Energy 53,6 Wh
Energy When Full 69,3 Wh
Energy Design 84 Wh
Rate 7,8 W
Seems the battery lost from August 2010 to now 17,5% capacity.
Where does Windows hide this information?
I run the test for 20% battery usage.
From 67,2 Wh to 53,6 Wh -> 13,6 Wh used
1:19:24 -> 4764 Seconds -> 10,27 W average.
During the test, just looking around what's there,
and a little bit surfing on sites with no ads.
No fan or fan on the lowest speed,
only a short time fan on higher speed.
After charging a little bit, the test started with Windows 7
The fan started, the fan went up to higher speed.
Task manager showed nearly no CPU use,
but only until I clicked "Show from all"
Svchoest.ext 50% CPU (is a dual core) 1,2 GB RAM
As svchoest.exe did not stop after some minutes,
I decided to kill the process.
Some minutes later, again.
After killing the process, the fan stopped, great!
Great only, until I realized, the task bar freezed,
only way to recover, pressing 10 seconds the on/off button....
After restart, soon again svchoest.exe occupied 1 CPU and 1,2 GB
20% battery used up after 59 minutes.
After charging a little bit, the test started again with Ubuntu.
25% battery was used up after 2:30
Conclusion: at Windows, I am only a co-user of my notebook.
Windows runs system processes without any regard what I want or not.
Similar events, not as extreme as at the test,
happened on long range flights Munich to Beijing and back
and caused much stress for me.
Imagine on the way to China and just making last improvements for the keynote for an economic conference. Suddenly the fan starts, because windows decides, that now is time for some useless tasks.