I've been one of those doubters, yet realizing it is possible. There could be a good reason for why it is true, but I can't think of a reason why the battery would make a difference. Perhaps someone can explain why it works.
Not lithium ion. The 12V accessory battery is still a lead acid based battery. No sense adding cost to the car for zero gain. Lithium ion batteries for 12V accessory use are still maturing. More useful in motorcycle world where the weight savings are more useful. Taking 15lbs out of your Model 3 isn't going to be significant to much at all.
Yeah, it's not a weight issue. It is more of a temperature tolerance issue. Lithium ion batteries get damaged if you try to recharge them while they are really cold, like below freezing. They need to be able to sell these cars in Canada and northern Europe and other places where it stays very cold through winter days and doesn't get above freezing, as well as in very hot places. The main battery is temperature controlled, so they can manage that to keep it OK, but the 12V isn't. So lead acid batteries can be discharged and recharged in very hot or very cold conditions and handle that reasonably well, whereas lithium ion wouldn't tolerate a very wide temperature range well.
right? Getting rid of a nagging spouse is wayyyy more than 15lbs. Just don't tell them I said that.
^^ what, he/she didnt check the air pressure? Amateur...
The car can almost do it. The PCS gets all it's running power directly from the HV battery. BUT, it still needs 12V to startup the PCS. Perhaps Tesla should add a little crank generator to the front of the car. Like an old-timer car.
