iPhone wall plug different?

[silbeej]

So i went to attach the supply cord from my MBP power brick to the iPhone one so i could have a little extra length, for the ipod cable is soooo short, and the connector is different. The iPhone one has a notch on both sides, where as the MBP one has it only on one side. why is this, for both parts only provide ac to the brick, where it is then converted to the correct voltage.

 

[samiwas]

So i went to attach the supply cord from my MBP power brick to the iPhone one so i could have a little extra length, for the ipod cable is soooo short, and the connector is different. The iPhone one has a notch on both sides, where as the MBP one has it only on one side. why is this, for both parts only provide ac to the brick, where it is then converted to the correct voltage.

There are indeed two different connectors. I think it has to do with whether the plug end of the cable is grounded or not. but I would think they would have made it so the grounded one could be plugged into an ungrounded brick, but not vice versa. But it seems just the opposite. Odd. I have both types of cables with the myriad of power adapters I hve for my laptops.