The problem occurs if I'm not in the vicinity and the phone remains connected to the battery charger after it has charged.
When I disconnect from the charger at some time after the phone is charged, the tone and the message continue to be activated. This appears to go on for a length of time that is equivalent to the length of time that elapsed between reaching full charge and finally being disconnected from the charger.
The tone is extremely annoying and I would like to shut it up!
Any ideas as to what is going on and how to stop it?