It would be interesting to hear some takes on this.
I have a car that is going to be 20 years old next year. No longer a teenager. In July, the battery died. My mum's hypothesis was that vacuuming the car and having the doors open for an extended period was what caused it, because we had changed the battery only a year prior.
A couple of weeks ago, I vacuumed the car. Then I didn't drive it for a few days. It wouldn't start. Dad says something about "phantom amps" and suggests that the Bluetooth FM transmitter plugged into the cigarette lighter could be causing it. Car has been jump-started and battery will hopefully be okay.
Both parents say it's an old car that's never been amazing with batteries. Or we've just had a run with shit batteries.
I'm just perplexed.