Don’t Let Anyone Take Away Your Big Box of Cables - Jim Nielsen’s Blog

I keep a box of just old power bricks. Some are pretty normal like 12vdc@2a but some are weirder. What needs 19.5vac@5a? I don’t know but when it needs it I’ve got it.

19.5v is pretty common for stuff that needs more power, but I’d bet there’s some threshold at 20v that means a device is no longer “low voltage”.

But AC? Are you sure? That would be exceedingly unusual.