It started with a simple battery. Around 2009, Amazon quietly entered the private label business by offering a handful of items under a new brand called AmazonBasics. Early offerings were the kinds of unglamorous products that consumers typically bought at their local hardware store: power cords and cables for electronics and, in particular, batteries — with prices roughly 30 percent lower than that of national brands like Energizer and Duracell. The results were stunning. In just a few years, AmazonBasics had grabbed nearly a third of the online market for batteries, outselling both Energizer and Duracell on its site. Inside Amazon’s Seattle headquarters, that success raised a tantalizing possibility. If, with very little effort, Amazon could become a huge player in the battery market, what else might be possible for the company? Anyone who spends much time on the Amazon site can see the answer to that question. The company now has roughly 100 private label brands for sale on its huge online marketplace, of which more than five dozen have been introduced in the past year alone. But few of those are sold under the Amazon brand. Read more at The New York Times.