Weird Home Electrical Question. DC & AC

[H-Man]

A laptop AC adapter or similar will run on high voltage DC provided that the rectifier bridge is up to the task of dealing with 100% duty cycle on half the diodes, the input voltage is within specification (144vdc should work on a power brick that can handle 110-220vac,) and that it is a SMPS. A SMPS will actually convert AC to DC before converting it to a lower voltage. A traditional transformer based supply needs AC or rapidly pulsed DC current to work, DC off of a battery will not power it.