Thought I would update what I’m doing with my Apple Pencil to maintain battery while not in use. I followed someone else’s suggestion to turn off BT—my concern was that I would then lose easy connection for my Airpods. I found that when I click on BT to turn it off—I get message saying disconnected from Apple Pencil—but I don’t lose my Air pod connection and the Pencil battery level remains the same until I use it next. I do have to reinsert the Pencil into lightning port, but that takes only a second or two—so this works for me until either a second Pencil comes out or software updates correct the issue. (I vaguely remember reading after IOS11 that when you turned off BT in control center you didn’t really turn it off completely—thus explaining the Airpod easy reconnection—if I have it connected to Ipad instead of Iphone/Watch)