Laptop battery should only charge up to 80%, and should it charge again from 40%?

It is known that it is best for lithium batteries when they are between 40% -80%. But since I have connected my Surface Pro to a dock, it charges permanently and would always be at 100%, which is the max. Would minimize capacity in the long run.

My question is whether I can set it to only charge up to 80% and start again at 40%. I know that you can set this in the BIOS, but then the battery always stays at 50%, so if I need 100% I would first have to change it in the bios.

Is there a tool or a setting that would solve my problem?

This is not easy in BIOS.

For this, the device or the power supply would have to have the appropriate hardware.

But the problem is not very big with current lithium batteries. As long as they are not at 100% all the time, or are always used completely down to 0%, that's okay.

And, what might interest you, if you use the laptop (?) On the power supply, the battery is completely bypassed. So that's best in terms of wear.

The battery is charged when using the power pack. How can it be bypassed?

When it is full not anymore.

When the battery is full, the laptop is only powered by the power adapter.

If the battery could not be bypassed, then the laptop would no longer work if you removed the battery.

He doesn't want to fully charge the battery, only up to 80%.

Yes that is nice.

But using the power supply is even better than charging it to 80% and then disconnecting it from the power supply.

He would like to operate the laptop on the power supply and only let the battery charge to 80%.

Then he should take out the battery.

If you want the battery to last the longest then you should use the laptop as much as possible on the power cord.
As it says, that was just a note. I already answered the question before.