What type of USB connector do these cases use?

I meant on the compact cases. I’m assuming the cable is not detachable on the larger models.

No, they are:

https://youtu.be/KhMzoGcZ9Wo?t=2m22s

The compact should still use Micro usb.

Cables on both compact and classic case keyboards are detachable!  They all use micro USB.  You can even replace the cable with your own cable down the line.

You only need a Phillips head screwdriver to open up the classic case and change the cable.

I meant on the compact cases. I’m assuming the cable is not detachable on the larger models.