In what we are guessing is an attempt to make the Kindle a bit more attractive when compared to the B&N nook, Amazon announced today that the Kindle 2 now ships with PDF support and a battery that lasts almost twice as long as previous Kindle 2s. The battery bump, in particular, gives you 7 days of use with wireless on as opposed to 4.

Even cooler, though, is the fact that if you already own a Kindle 2, there will be a firmware update released over-the-air that will give you the same functionality, including the 85% increase in battery life! No date has been announced for the release of that update, but we’d be surprised if it didn’t arrive any day now. Gotta love competition. You can pick up the Kindle 2 on Amazon.