Well....my enthusiasm and exuberance over thinking my truck was fixed was shot down this AM. Same problem as I've been having. Being short on time and patience, I took it to the dealer to have it checked out. I can't fathom two separate batteries being bad, but stranger things have happened. They both had a 6/17 date on them, so maybe they had a bad batch of them.
On a different note...Enterprise put me in a 2017 F-150 CC 4x4 with the 2.7 Ecoboost. Dang !! That engine runs like a scalded ass ape !! If the 2.7 performs virtually identically to my 5.0, I will really have to consider the 3.5 Ecoboost on the next purchase.
Will let you know how things ultimately turn out.