Re: Power adaptors are always useful
If the psu is not regulated then it is probably going to deliver a much higher voltage to a device which has a lower current draw.
On the one hand.. I've never had a problem with appliance PSU's of any sort. If I have a 12v .00000001A device and a 12V 1,0000,0000amp PSU I'll expect it to work.
On the other hand.... I've killed a couple of motorbike voltage regulators by jumping the bike from a running car. Older/smaller bikes use something like a zener diode to regulate voltage, and they dump excess power to ground (heating up in the process). A car tends to run at a slightly higher voltage than a bike (IIRC 14.5 vs 14.1), and the poor little zener just cannot keep up.