Apple Pencil 5% Charge Warning

My Apple Pencil is somewhere in the house. I haven't seen it in nearly a month.

Then last night when I opened my iPad Pro 12.9 2017 it showed a notification that my lost Apple Pencil was down to a 5% charge.

I am wondering how to use this information to locate my Apple Pencil. Answers to the following questions might help.

Questions:

1) When does an Apple Pencil go to sleep?

2) What might wake the Pencil up?

3) When the charge goes to 5%, who gets the broadcast and at what range?

4) After making the 5% broadcast, does the Pencil go back to sleep?

5) Can a sleeping Pencil be found with an app like Bluetooth Smart Scanner by Ace Sensor?

6) Does the location where I saw the notification of Apple Pencil 5% charge when I opened my iPad Pro help to locate the Pencil? Or, could the notification have been transmitted and received when the iPad Pro was in a different part of the house, and saved in the iPad until I moved it and opened the iPad some time later?

-Tom