So I received the Apple Pencil a couple of days ago. I noticed that charging the Pencil with iPad lightning port is much faster than charging it with the adapter. I am curious on why is it possible? Intuitively, shouldn't be charging with the adapter faster than with the iPad? Maybe there is a preprogrammed mechanism in the iPad software that makes it pumping out more electricity through the lightning port when a Pencil is connected? I feel very amused with this, so I hope someone can enlighten me on how pencil fast charge is possible. Thank you!