In old “Snowball” the Volvo I have my TYT-9800 and it has the voltage display feature. On the way home from church, Sunday, the dash lights were all glowing just a bit. On old Volvos that is either a sign of a bad battery or a bad alternator. The voltage was at 11.5, 11.4, 11.3 as we drove home and this morning it was 11.0. New alternator was installed and we are back to charging.
If the car has broken down… but she didn’t.