BIG BIG problem with Johnson Controls and their strap stub to terminal post interface. Good resting voltage, good specific gravity, unable to support a 10-amp load. I have no idea if this is the issue with these batteries and I recommend dougranier's course of investigation with much emphasis. Take the batteries to a pro.
Overall quality of mass-produced flooded batteries for auto & RV seems to be declining. I can only wonder if I am seeing first peals of the death knell for Made in USA car jar batteries.
However that comment does not fix your problem. I can only wince at the thought of the difference between a knowledgeable distributor and a pimple-face teenager at a Wal-Mart.
Keep (everyone) posted..
