Now keeping in mind that I have disabled the stop start feature permanently I find it odd that the stop start battery is totally dead. It was replaced at 45k miles or so by the dealer. I was thinking about using the aux battery to power my BlackVue dash cam in parking mode but then found out it is totally dead. Now do we have a reason why it’s (and everyone else’s) dead? Does it not charge properly from the alternator? Or do they die from use or age? Because I can replace it and then use it as a dash cam battery but if it doesn’t charge properly that will be pointless. Any thoughts ?