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Solve : power usage?

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Hi everyone, I have simple question but I'm unable to google: does laptop still use power when I power it off and plug CHARGER in but battery is fully charged?If the power button is off and the battery has a full charge, the flowing takes place whle the power cord is in the mains.
The system is off all the way. The battery charger system will go into idle mode. However, a very smell am mount of power is needed to monitor the status of the battery. Some systems use a passive mode where a small tinkle change is given to the battery. The am mount of power is very low, a fraction o a watt.

Just now I did a SEARCH on Google for this sentence:
How much power does my laptop use when it is turned off
Google said:
Quote

Always leaving a laptop computer plugged in, even when it's fully charged, can use a similar quantity — 4.5 kilowatt-hours of electricity in a week, or about 235 kilowatt-hours a year. (Your mileage may vary, depending on MODEL and battery.May 7, 2016
The quote is from an article in the NY Times.
https://www.nytimes.com/2016/05/08/science/just-how-much-power-do-your-electronics-use-when-they-are-off.html
Here is a better answer, but more reading needed.
https://forums.tomshardware.com/threads/how-much-power-does-a-computer-use-when-turned-off.237650/

Myself, I prefer to turn stuff all the way off. I just do not like the idea of letting something suck even a tiny bit of juice.  I have four laptops on-hand and they all show a draw of between 6 watts to 12 watts when plugged in, with a full battery, and turned off. I don't have any that approach the figures Geek-99pm found cited, which I believe would need to have a consumption of about twice the highest I measured.


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