[prairieschooner]

sorry Russ but a set of AGM Batteries could be rejuvenated by going through the Equalization or Conditioning process. Go to my earlier link to Lifeline's Battery Users Manual and you can read about this.
When I was taking care of that Egg Harbor that had Lifeline AGM Batteries and the Batteries were starting to lose life, I talked to Lifeline about this and that is what they recommended. On that vessel and others that I maintained it worked and the Batteries were as good as new but that is not always the case.
Before I went out and spent that kind of $$ on new Batteries I would at least try that process although I am not familiar with the Power Pulse and if does something very similar.