The Naperville Effect

Yet another story about the Naperville effect. This afternoon I went to Batteries Plus on Ogden Avenue to buy a new battery for my electronic food scales. (If I thought it would help my weight loss, I'd buy new ones for our bathroom scales too). Anyway, an assistant spent ages wandering round the shop trying to help me. Eventually the correct battery was located by the counter, so I took out my purse.
"That's ok, it's free," he said, handing me my new battery. "This was a single one out of a packet. There's no charge."