"Super heavy duty" AA batteries sell four for about a dollar at Wal-Mart. Sounds like a deal? Not to Gillette Co. The Boston-based maker of the nation's top-selling Duracell brand has launched an ...

Duracell batteries are everywhere—TV remotes, game controllers, flashlights, and just about any gadget that needs a reliable power source. And that's no accident. With a reputation built on ...