After reading another member’s suggestion I purchased aFor those wondering the lifetime of a 12V battery in an EV, it seems to be considerably shorter than the lifetime of that same 12V battery in an ICE car. I belong to several EV forums for different makes of cars. A failing 12V battery is very common in EV cars 3 years old and older. The hypothesis is that EVs never actually have a high current load (like a starter cranking over an engine), so the plates sulfate and eventually short out. Also I have noticed that the DC to DC converter seems to put a high voltage on the 12V system the entire time the car is on, like around 14.4 - 14.6 Volts, which is overcharging the 12V battery and shortening its life span. Also it appears that the 12V battery in an EV will generally fail with little to no warning. You might get lucky with a replace 12V battery now error message. Whereas with an ICE vehicle, you generally know when the 12V battery is failing, as you notice a slow crank.
QUICKLYNKS Auto Battery Monitor BM2 Bluetooth 4.0
12V on Amazon for less than 25$. It monitors the 12v battery and sends alerts if the battery is failing. A great little gadget
for 500e owners! https://www.amazon.com/QUICKLYNKS-B...pZGdldE5hbWU9c3BfcGhvbmVhcHBfc2VhcmNoX2F0Zg==