Me and my SO were given that as the cause of our battery being randomly dead every month/month and a half. Her drive to and from work (about 15 minutes) is not enough to keep the battery from discharging, so thats why it dies every so often. (It even did it earlier this week, even if we went to my parents/stepparents for christmas, which is a 45 minute drive.)
The dealership checked and rechecked all of the battery components, and it seems we have a still great battery. So it should not be that.
So is a 15 minute drive ok to keep the battery good or is there some habits I should take to avoid that problem?
Car is a 2013 Corolla, with loads of options (Power windows, heated seats, etc, that could drain a battery). We live in Canada, but last time the battery was dead it was in a week where in never got under -5°C... Really the question boils down to is this a thing, or are we getting served some good old balloney.