What I was getting it was I thought they didn't have any analog component whatsoever, but they have to because there'd be no other way to carry an analog electrical signal to charge something-- similar to usb. I was thinking they were more akin to an hdmi or optical cord, but I guess not. I don't use any modern apple iDevices.
How should I put it...DC power is not a data signal. HDMI can carry power and still be a digital connection.