>Some monitors actually are powered from external adapter. No idea how common it is, but one is sitting on my desk. Well that's just AC/DC which is similar to

>Some monitors actually are powered from external adapter. No idea how common it is, but one is sitting on my desk. Well that's just AC/DC which is similar to the PSU of a computer or laptop. The monitor, itself, has voltage regulation for much lower volts that the one connected to the mains.