Hi!
I’m aware, that pico PSUs usually require a 12V input - exactly that is the issue.
However, wouldn’t it be nice to re-use that dust-collecting 19V power brick, of the long-gone laptop, you’ve already got, instead?!? It’d be a shame to buy a new(or pre-owned) unit, just because the usual pico PSUs can’t handle above 12V input, imho!
This is supposed to be a thread, where you should post makes and models, and sources/sellers, of pico PSUs, that CAN HANDLE a 19-20V input.
…i’m sorry, i haven’t found one, yet - that’s why i’m posting this - i’ll let y’all know, when i do
EDIT: i should specify, that it SHOULD be 24-Pin pico PSU 
…that mini-box.com one is not.
EDIT2: i gather, we should look for the wide range input keyword