It’s nice being able to charge directly from the iPad in a pinch. Supposedly 15 seconds of charging gives you 30 minutes of use.

I’ve just been using the female-female adapter as a cap, but it doesn’t look as nice. It’s more oval than round and has the exposed port.

I’m kind of surprised no one has made a nicer female-female adapter with matching male cap.

> why not just put a female-end of lightning port

Because when I'm out and about, I don't want to stop somewhere to charge my pencil. This way, you plug it in to the iPad, and in less than a minute you can work with it for any hour or more - no need to hunt for a wall plug or bring along a cable.