For the battery experts here, two questions. I have a car with an AGM battery, first time I’ve had one. It’s the original, made in 2013 and seems to still be fine but I’m suspicious of it going into winter now at 8 years. 1. What is a good PM replacement time for AGM batteries? Normally I replace wet cells at 5-6 years in this climate, but AGM supposedly last longer. 2. What symptoms do AGM batteries exhibit near end of life? I’ve heard that usually they suddenly die, unlike wet cells, which typically have noticeably lower starting current resulting in slower starter speed.