I just came across the thread about the Honda Oddessy AGM Battery death during a coincidental search for AGM battery deaths. My Mother, who is 90, goes in to crank up the 2013 Honda Accord that she just drove the day before, and clk clk clk clk... Battery was replaced by a Honda Dealer, with a Honda-branded AGM battery, in Aug of '19. No warning, no slow cranking, just died. Then, I thought, you know, my 2014 Elantra did the exact same thing, at the 4 year mark. Same way. Cranked fine in the morning, then dead after work. I now have a 2021 Tucson I bought in Aug of '20. I'm beginning to wonder if proactively changing this would be a good idea. The vehicle has almost 60K on it, I live in Arkansastan, it 103* this week, but the battery seems to perform OK, just like the others did. I just put a SShunacher charger on it with AGM setting, showed it at 12.2V 61% charge. This is on a vehicle that has not bee driven since yesterday afternoon. Opinions? Is this just an AGM thing, or limited to Honda's and Hyundai's?
