I already have, but let me try again. They put it on an external charger. That charger is not governed by the system so it can charge over the 80% limit of the BMW battery registration. The BMW charger in the car doesn’t necessarily charge at full current and will allow some discharge within reason. The battery is taking charge, the car isn’t charging it to your liking. My own anecdote. My battery from time to time if I turn the car off at the wrong time not have a high enough capacity for my signal generator to recognize the startup signal so it will fail to turn on my amplifier. This happens once out of thirty times at worst. This points to the charging system is controlling charge current and will only get aggressive on charging at lower battery voltage levels. You don’t see me shitting bricks over this and I’m an engineer involved with lead acid battery systems. Like I said, IMO, you only deserve a new battery because they promised you one, not from the metrics as they are shit metrics. You absolutely may have a battery with less life, but I wouldn’t trust the data points you are giving to make that call. The system is meant to trend and alarm in absolutely concerning conditions, not make a snapshot based decision about marginal losses.