Experience I've had with all…
Experience I've had with all my gas Fords and the 2 Nissans we've had is our batteries last about 5-8 years in normal use. However the Fusion Enegi we had went through a 12v battery roughly every 2.5 years. The last one left us sit in our driveway 4 days while we worked to gain access to the trunk. Honest, that battery was the size of the old 6volts we could buy back in the 60's. Why Ford ever went with that size and format battery for "starting purposes" hasn't been explained.
So, we have to wonder, if we have large battery packs propelling the car, why do we still need a 12volt system for accessories, and how does it actually stay charged ?