Ford Fusion Battery

Hello, about 6 months ago I bought a 2014 Ford Fusion Se. Since then the battery has died twice. Both times the screen in the vehicle said battery saver turn on ignition or start the engine. I did this but the car still wouldn't start. I was able to jump the car. I took the battery in to get tested and they said it was fine. They told me it was because I do not put enough miles on the car to keep the battery charged since there are so many computer chips in my vehicle that need power. Do you guys think this is true? via /r/cars http://ift.tt/2tfgNpl