Notion Ink Adam has long been one of our favorite pieces of perfectly plausible vaporware, but founder Rohan Shravan's just made a pretty fantastic claim -- he says he's getting a minimum of 15 hours of battery life from his personal tablet and calculates you'll get up to twenty with the 24Wh, potentially user-replaceable battery nestled in its frame. While those are the figures for the $498 transflective version of the tablet and not the $399 juice-gulping LCD, they're still so stellar that they could easily make or break the Adam's sales depending on their veracity. Oh Rohan, please don't let us down.