Had my wife's Legacy serviced and the tech wrote on the report that her 6 month old battery needed to be charged. My mulitmeter showed voltage at 12.1. She drives mainly short trips and since that is what I had been doing with my 2019 Touring, I checked my battery. It was 12.15. Surprised that the alternators can't keep battery fully charged. Checked it again after a 30 mile trip on the interstate and battery was at 12.45. Could this be the reason for the early battery failures...chronically undercharging?