If you discharge the high voltage battery to 0, you’ve got much bigger problems than potentially needing to replace the low voltage battery. Leaving the high vo

If you discharge the high voltage battery to 0, you’ve got much bigger problems than potentially needing to replace the low voltage battery. Leaving the high voltage battery at 0 is terrible for it as well, which is much more expensive to replace. Unless you’re leaving the car in that state for days, I don’t anticipate that you’d have any real damage to anything though.