I'm not sure of the intricacies but this change was made to avoid the dead 12v situations. I imagine now as the main battery can now recharge the lithium one easily it keeps it topped up somehow to avoid this happening.
I left my Tesla for nearly 3 week holiday not plugged in and it was fine when i came back.
Neurodegenarative disorders poke holes in the infinite consciousness idea. Each day the brain slowly wears away, the consciousness of self is never the same.
Not to mention that the universe itself is pretty certain to end eventually. If there isn't a big crunch, then every single atomic partlcle has a half life, one day there will be near 0 protons left.
My take on consciousness is that you essentially 'die' each time you go into a deep sleep. When you wake, a new stream of consciousness starts in a brain ever so slightly different from the one that fell asleep the night before. Your new consciousness remembers everything you once did and is in a brain that handles stimuli and emotions almost exactly as the day before. But it isn't the same, it cant be as cells have died or been replaced during the down time that was a deep sleep.
Better to think there is an end after death, infinite consciousness would be terrible as you would eventually just be utterly sick of existence after a googleplex of years has passed by. I don't understand the concept of heaven, as good as it would be at first, it would eventually become torture of non stop existence.