State the reason you wish to close your account. If you have a copy of the EIN Assignment Notice that was issued when your EIN was assigned, you should include that when you write. Otherwise, be sure to include the complete legal name of the entity, the EIN, and the mailing address.
After all, if your iPad doesn't have any power, it doesn't work. The iPad's battery is generally pretty good, but if your battery is starting to fail, you've got a problem. You can't easily swap out a failing battery for a new one because Apple designs its products with solid cases.
Same issue, battery widget is gone, cannot check on battery level of Apple Pencil. I just called AppleCare Germany and the support told me that this is actually an Apple system issue. Even without updating my iOS version this seems to have changed in the background maybe due to an iCloud change.