Hey yall. I know this has been discussed at length on here, but I wanted to provide a different perspective. So my 12v alarm went off 2 weeks ago, with the earliest appointment being yesterday. The service center was impossible to reach by phone. Batteries were apparently not in stock. There is very limited info on here about replacement batteries other than the stock Atlas battery. I was able to locate a battery at Napa Auto Parts. The sales tech sized it in the 51R category, negative terminal on the right. This fit right in my 2018 Tesla Model 3 Long Range, and worked fine. I was worried because some people on here expressed that installing a non-Tesla battery may void other warranties or cause issues, so I installed the Atlas back in the car before the service tech arrived. While he was there, I confirmed that there is NO PROBLEM with you sizing this battery up from Napa or wherever, and changing it yourself. I see some of you have your Tesla waiting in a service center for a battery!? You can do this in a parking lot in 10 minutes yourself. Just FYI, trying to share some info. Good luck!
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