I could put 20v at .01A on for a while and not do serious damage to a flooded battery, even If the battery terminal measured voltage crept up to 20v?
You will never be able to create that condition with a good battery that is partially discharged. When you apply 20Vdc, then either the current will far exceed .01A or the voltage will drop or both. For any given load, you can control the voltage and the current will go where it will or you can control the current and watch the voltage change but you can't do both at the same time. This is a simple application of Ohm's Law.
It seems to me that the true wealth of a nation is measured in its ability to manufacture products and services that its population and the populations of other countries want. If that is true, then we are slowly transferring our wealth to China. At some point, our money will become worthless to them and they will stop making loans to us. At that time, our economy will collapse and we will all be be truly destitute. That appears to be the trajectory we are on and nobody seems to want to do anything about it. Merry Christmas!
I used to tow a 4400 pound fully loaded (measured weight) Forest River Flagstaff with a 2011 Frontier rated to tow 6500 pounds. There was absolutely no safety issue using a correctly adjusted weight distributing hitch and friction type anti-sway bar. I pulled it all over steep and curvy roads in the Blue Ridge Mountains without difficulty (but some amount of patience). I think the safety issue raised by some people has more to do with a lack of experience rather than lack of towing capacity. On the other hand, I now tow the same trailer with a RAM 1500 with the 5.7L Hemi. It is overkill but I really like the quietness and acceleration of the combination. The Frontier V-6 needs to be wound up to 3500+ RPM to make enough power going up hills and accelerating from a stop. This won't hurt the engine but the noise was very annoying to me. The Hemi just loafs along at 1800-2500 RPM or less most of the time.