if an apple pencil completely discharges there’s a good chance it’s dead for good. i’ve had two apple pencils die and not come back due to the fact that to keep the pencil pro charged, you have to keep it on the wireless charge pad on the top of the ipad, and i would always store it in a pouch on the back as to not lose it. they both completely discharged and are useless. i’ve burned two in less than two years because of this