My sister had some medical issues and i had her car at my house for many months, a 2011 Ford Fusion. Back in March I hadn’t been starting it much & the battery died and was replaced on warranty service. I was driving it maybe every 3 - four weeks. It died again in the summer & I had to jump start it. A few weeks ago I started it & just pulled it up my driveway to change her cabin filter. When I was done it wouldn’t start again & I had to jump start it. It’s under warranty & they replaced the battery again. The service guy said with all the computerized things on cars these days there is always something draining the battery & it should be run every week for at least 30 minutes. I have some problems with that figuring it is such a low current drain the car should go many weeks and the battery still be good. Looking for some feedback on this subject.