Been open 2 hours and we've had 17 cars towed in for dead batteries this morning. Every single one of them had a battery that was 5+ years old. Get your battery checked people.
We had that last winter. The shop had bought a really nice handheld battery tester in the middle of the summer. Just about every oil change that came it got the battery tested, recommended tons of them be replaced either immediately or before cold weather hit. When the temps dropped to a steady -20C for weeks on end, it was a non-stop parade of dead batteries. We were selling a whole month's supply in a few hours. Eventually, everyone was sold out of just about every size of battery.
I had absolutely no compassion for the folks that had refused to replace it earlier when I told them that it was ready to fail. Especially the ones that argued that "it's only 4 years old, there's nothing wrong with it".

