Dell Power Manager Thresholds

I currently have my Dell Power Manager set to charge from 30% to 80%

My question is that, when my battery is higher than 80% (85% for example), it shows that the laptop is plugged in, not charging. And the battery levels remain at 85% indefinitely.

Does that meant he power is going straight into my system? And it is the equivalent of "taking the battery out"?

I ask, because we can't actually remove the battery from our new laptops, and I'd just like to confirm what I think is happening

Thanks in advance for your help!