The last time I looked, prices were twice the standard lead battery cost and warranties were less. I concluded that regardless of technical improvements my money was preferred over AGM. Batteries rarely give a problem and the fix is simple and quick - replace with the highest CCA available weighted for price and warranty. No painful R&R or even much troubleshooting required.

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85SD 240K & stopped counting painted, putting bac together. 84SD 180,000. sold to a neighbor and member here but I forget his handle. The 84 is much improved from when I had it. 85TD beginning to repair to DD status. Lots of stuff to do.