Feb 10th - had my car in for service to replace the 12V battery, as I got the message that it needs replacing. This is what Tesla did: Had the car in for service today for a fan bearing malfunction (was making a high frequency noise when the AC was on). On my invoice, they told me that the replace battery message showed up, and they replaced it again. I spend a decent amount of time talking to the service advisor (I think?) as to why my battery lasted for 3 months. And that I don't want to come back in 3 months again (first one lasted about 18 months). I was concerned that something is wrong with the car. His response was something along the lines of "don't worry", "it might be a one off", "something might have just triggered a flag, and the techs replaced it to be safe", etc. None of those are re-assuring. Anyone else had a battery go bad in 3 months? What was the cause? What was the fix?