Amazon, with its unfettered access to troves of valuable consumer and seller data, came upon a rather interesting business model around 2009, when it launched a private label division under the name AmazonBasics. It started first with the items the company noticed people most often purchased without thinking too hard about the brand name, like batteries and HDMI cables. But as The New York Times reported this past summer, this proved to be a way to fast track a fledgling product category into a massive money-making top seller — AmazonBasics’ AA batteries now outsell Duracell and Energizer on Amazon.com after just a few years.