Sorry to necro post, BUT I just encountered this issue. @
Just_Me_D is correct, you simply need to add the battery widget. Here's how you do that.....
How to Check Apple Pencil Battery Life and How to Charge It - How to Check Apple Pencil Battery Life
- There is no battery status indicator on Apple Pencil so you cannot directly check the battery percentage of it. You need to enable iOS 9’s battery widget on your iPad
- On your iPad Pro, swipe down from the top of the screen to bring Notification Center.
- Switch to the Today view, scroll down to the bottom and tap the Edit button.
- Tap the green Plus sign next to "Batteries" to enable the widget.
- Tap Done.
Credits to
imobie