@BorrisInABox My external power bank always, and I do mean always, wants my laptop to charge it, not the other way around. Apparently by means of a complicated ritual of pressing the singular button it has, combined with unplugging and plugging it back in as if you were trying to reset a GE smart light bulb, you're supposed to be able to reverse that situation, but I have never gotten it to work. So... uh... thanks. I guess. Really useful. lol