iPad mini 4 will only charge when fully discharged
I have an iPad mini 4, model MK9P2B/A tablet. The problem is
that it will only charge when the battery is fully discharged and the screen is
blank. Plugged in whilst in the fully discharged state it will charge to 100%
over several hours. If I try to use it whilst plugged in before fully charged
it will work, but will not continue to charge further until once again fully
discharged. Re-booting does not cure the problem. Any suggestions as to how to
get it to charge in the normal manner again, in its current state it is almost
useless.
iPad mini 4, iPadOS 15