battery life

Just today I was looking at OBD readings and I noticed HVBSOH dropped to 97.5% and the battery age is shown as 13 months. Is this normal? How fast do these batteries degrade? I only use Level 1 chargers day to day and use Level 3 when I take long trips (400 - 600 miles), which is once in 2-3 months.

When I first got my MME in November of 2021, I didn’t even consider tracking the High Voltage Battery (HVB) State of Health (SoH). But then last Fall, while tracking other data using a OBDII scanner, I noticed the SoH was much lower than the last time I noticed. I was kind of shocked with the...