I'm think you'll be happier with ANY Group 35 AGM battery from a local autoparts store.I appreciate all your diligence and testing! I already figured I'd get a lithium batter car starter thing, and for my kids when the prices come down (black friday?), but just for those rare situations. It sucks that modern cars do draw so much power! I'll have to test out my accessory mode, for some reason I thought so many things are turned off except the radio, but not even climate controls work, and even then the car's battery is dead within the hour.
If you find something good for either an actual higher capacity battery replacement for a car, or that lithium battery starter, please do share!
As soon as pay day hits, I'm going straight to Autozone for their AGM platinum.