What kind of battery life is everyone getting on their Pro's while using the Apple Pencil? I received mine last night, even though I've had the iPad Pro for about 10 days now. I was a little surprised to see the battery drain about 20% in 2 hours, while using the Pencil to write/draw. Surprising because I was seeing just phenomenal battery life on the iPad Pro before using the Pencil. I am sure drawing/writing with the Pencil takes more resources (not to mention the 240Hz screen refresh?), but does the drain seem reasonable? Anyone else in the same boat?