Please don't be imaginary, Notion Ink.
Longevity is one of the most crucial factors to consider when thinking about a potential "iPad-killer". Any tablet that wants to compete with Apple's titan will need to come close to or equal the iPad's 10-12 hour battery life. So far, no major manufacturer has stepped forward. But with the Adam that may all change.
Notion Ink has just put up a blog post detailing the Adam's battery and speakers. First off, Rohan was clear that he is not satisfied by any of the current tablet speakers out there. He believes the Adam beats them all. It has been designed to have much more resonant bass than other similar-sized devices.
Of more general interest is the battery. Rohan claims that (in full power mode) he gets a minimum of 15 hours and as long as two days on a charge. So it seems like this thing will be great for a weekend of sporadic to moderate use. The Adam has a 24 Whr capacity compared to the iPad's 25 Whr. The Adam draws around 1.2 Whr, which gives it roughly 20 hours of battery life on paper.