Zero Gravity or Anti Gravity? I believe two different offerings. For 80ah LiPos, I've seen 600-2000 CCA depending on manufacturers claims. Don't know how well they hold up to cranking these days but were not so up to the task then. Mine from different manufacturers do not like extreme temps though.I’m not 100% but reaching out to the zero gravity crew they assured me even in rough off-roading and heat I shouldn’t have any issues with it.
Weight for 80 amp hours is 22 pounds I think. Maybe 24.
Reserve is a long time and it’ll smart reserve power you can turn on with a key fob if your truck was sitting for 6 months.
However, dropped about 350lbs from my cart with a higher torque motor and she's LIMITED to 30mph loaded with 680lbs of people n dogs. Sooooo worth it! My Kawasaki Z1000 didn't mind a 1/3 weight battery either. Think shaved 90lbs off the boat but can't recall exact numbers there.
If they can crank these days, the price is worth it as they take sooooooooooooo many more charges than lead acid. I just don't have any data for autos.