Seems their QAQC is either entirely absent or woefully inadequate. Warranty also went bad, customer service wise. Obstacles, tap dancing, hemming and hawing about warrant terms.
TL;DR if you ever connected your battery to your vehicle, they want to convince you it's the wrong way to use a battery. Should leave it on a bench, connected to a charger, forever, it seems.
Excuses for shoddy manufacturing, that is what it is.