I will have to check for the charging then draining issue while attached to the iPad. I think I recall seeing 98% after reaching 100%, but I was more interested in topping off the Pencil to learn the lifespan and to make sure it sleeps after not being in use for a while.
I seem to be experiencing where my Pencil will charge to 100%. When I remove it, it will eventually sleep and disconnect from the iPad. However, it will still slowly drain on its own. After almost 24 hours and it went from 100% down to 90%.
While not a whole lot, my understanding is that the Pencil should hold its charge and remain at 100% easily for a few days if never in use. Not sure if others are experiencing similar or if this okay behavior. I’m thinking of exchanging it since it was an open box purchase, just to see.