Apple Pencil won’t charge
I haven’t used my Apple Pencil in a while and now it won’t charge. It connects to my iPad and even shows up in Bluetooth and on the battery widget but it stays at 0 even charging it overnight didn’t work.
iPad Air
The major drawback of lithium rechargeable batteries, not just the ones used in the Apple Pencils, is that if left near or fully depleted, for an extended period of time, they will lose their ability to be charged. This is, most likely, the case here ... and, unfortunately, Apple does not repair them or replace their batteries.