Q: What is a Lightning to USB Cable?  Where do I get it?  Will it work to charge the pencil to a wall plug?

A lightening to USB cable is the cable you charge your iPad with. You need a special adaptor to use it with the pencil, give me a second to find one.

Go to the link below and scroll down to "Charge your Apple Pencil."

Use Apple Pencil with iPad Pro - Apple Support

You'll need the tiny connector below.