There are several different types. This one references built-in electronics to sense this and that, which presumably requires some power. Does anybody know the comparison? Along the same lines - does my new phone charger (small block, usb connection to mini usb) have the same issues as the old ones? There doesn't seem to be enough room for a large transformer in there. I don't know if they're smaller or if it's a new technology.
Tatnall School (Wilmington DE)
JHU Center for Talented Youth