Pierre44

It is a 2014 Fusion Hybrid SE. So the 12V battery is what starts the car?

I woke up this morning to a dead car (Fusion 2014 Hybrid SE) I could not open it with the key fob and could not even activate the code on the door. Somehow it seemed like there was not enough power to do anything. I called AAA and they jumped started it. After using it for a little while I parked it again in my driveway. I tried using it again this afternoon and same thing. This time I jumped started it myself by connecting the 12V battery in the left side of the trunk to my other car. My question: Can someone confirm that I need to replace the 12v battery? I read stories about replacing the big hybrid battery and I am getting scared because this would be in the 1000's dollars.... Thank you for any input.