If anyone was wondering, you can drive an HDJ81 a REALLY long time with almost no battery power. My alternator went out 6 hours from home and after I jumped it, it drove all the way home. The whole dash was dead, I had to shift manually and not having a radio kind of sucked but it drove all the way into my driveway. I’m calling it a confidence building exercise. It was pretty cool having a major failure and being pretty much unaffected. Mechanical injection for the win?