That sounds right.

I’m also mostly familiar with the business lines: Dell Latitude and slightly less with HP ProBook.

Given the context that we were talking about laptop chargers rather than generic power bricks, I think it’s fair to consider standard laptop power supplies. (HP has the same connectors even though their protocol is different, and I’m not familiar with other brands but I expect they are much the same).

Unfortunately, barrel plugs tell you zilch about the power supply they’re connected to. They’re a dumb connector with no data capability whatsoever, and I’ve seen the same size of plug on power supplies with output anywhere from 3V to 24V.

That’s definitely not true: Dell laptop chargers and desktop power supplies do communicate what wattage they are able to supply.

You think you have to kiss to fuck?