Wow, you got 7+ years on the original battery, that is amazing... I just cleaned the battery terminals, tray, sheet metal... on ours and I am done with flooded lead acid batteries. Yes they are cheap but they make a mess where the AGMs typically do not. I would be curious to know if your Everstart AGM has clean terminals a year later. Every AGM I have had did not have the terminal corrosion issues the flooded batteries have.