It's all part of our weight loss journey! The Tesla manages the 12V battery much more gently than an ICE car so the stock battery or this upgraded one will likely last a very long time. The 12V battery is in your frunk compartment, under that plastic cowl cover, it pops right off if you want to have a look inside.For the automotive engineers out there: I’m not sure where my 12v battery resides inside my RWD Model 3, but wherever it is, I’m guessing that losing a 24lb moment arm from the center of the car could affect handling? Or is it so minuscule as to be not noticed and not a factor?
For @gwdecker726, no, this isn’t a necessary upgrade at least not for me. However, when my existing 12v gets weak enough to possibly become unreliable, this battery sounds like a terrific replacement. Now, that said, I have a 2012 LEAF purchased new that now 7 years later still has its original 12v with no evidence of deterioration sufficient to replace it. In fairness, I have replaced 12v’s in my 1964 Ford Thunderbird though probably because it needs roughly a million cold cranking amps to get the huge V-8 turning.