How to revive a 'dead' AGM battery
Perhaps some will find this of value.
Don't throw it out and spend a couple hundred dollar for a new battery until you try this:
How To Charge an AGM Battery - Hot Rod Network
2012 Fun Finder XT 276 Toy Hauler & Harley Davidson Ultra Classic with Condor wheel chock
2014 Dodge Ram 2500 AT 4X4 Crew Cab 6.4 L Hemi, 373 gears, tow package, Rambox option, Revolver X2 tonneau cover, Equal-I-zer anti-sway hitch.