It has been almost a year since Amazon put out a new Kindle model, the $119 Paperwhite, and you might think that ebook readers have more or less reached their perfection. No quite, if this latest insider tip is to be believed. Hot on the heels of Jeff Bezos' teaser announcement of an upcoming new Kindle, insider sources are dropping hints on what will make this latest addition to the family interesting. Those sources claim that this new Kindle will be the thinnest Kindle yet. But, it might compromise on the battery in the process.