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.
The iPad Pro has 12.9-inch retina display that means it would be a little bit hard to use it without an Apple Pencil. It has a non-replaceable, rechargeable, tiny 3.82 V, 0.329 Wh lithium-ion battery. As Apple said, it can gain 30 minutes of battery with only 15 seconds charge.