Hi, I own a mazda 6 GT 2016 4 cyl. I got the "Battery System need to check" (something on those lines). I called the Jim Ellys dealership in ATL and the first thing they toll me over the phone is that I need a new battery and it will cost close to $600.00. I am just curious if is normal that a batter with 3+ years need to be replaced???? Any help would be great.