STM has added power to its bags in the new Bowery Energy 13” Laptop Brief. We first saw the company’s plans for the bag at CES this year — Bowery Energy can hold up to a 13” MacBook, along with other accessories, but its most notable feature is where the “Energy” comes from, as the bag comes with its own battery. The included Joey charger allows users to charge devices while within the bag. There’s also a 15”…