Obraik:
Since early 2022, Tesla switched from the traditional 12v lead acid battery to a 15v lithium battery in all their vehicles, mostly to resolve the inevitable reliability issue that comes from the traditional batteries. If you have a Tesla with the Ryzen processor for its infotainment (visible in the "About" screen of your car settings) then you have this.
That's not to say they're immune to fault, but it should be a lot less than a lead-acid.
@Obraik - do you know the answer to my earlier question re these batteries, ie whether one can use a lithium-powered jump starter with them?
What's weird as well is I still see references to them being 12v, eg the battery Drive EV is selling https://shop.driveev.co.nz/products/copy-of-ohmmu-12v-lithium-battery-for-tesla-model-y - or is this designed for replacing a lead acid 12v in an earlier Tesla? It's just that it's advertised for a Y, and of course all Ys in NZ will come with a lithium secondary battery.