I was hoping someone with more knowledge would do the research for me -- I am lazy. But I stumbled onto a useful article:
Pulse rehabs truly dead batteries -- field testThe article is about car batteries, not deep cycle. And it talks about rehabbing a dead battery, not maintaining a good one. And it does not mention AGMs. So there is a lot of wiggle room here. But this article gives me hope that the pulse is not a complete waste of money.
I also did a search for lawsuits involving the Batteryminder that involve claims of fraud. I came up empty. So evidently the plaintiffs' lawyers, who are always on the lookout for class action fodder, have steered clear of this product. Absence of evidence is not necessarily evidence of absence, but in this case it might be.
