At today's WWDC keynote in San Francisco, California, Apple announced new 11-inch and 13-inch MacBook Airs, which have been designed with battery life in mind.



From MacRumors:

As expected, the new Airs use Haswell processors that offer enhanced performance and significantly improved battery life, but feature no cosmetic changes. With the new Haswell processors, The 11" MacBook Air will now have nine hours of battery life while the 13" MacBook Air will have a stunning 12 hours of battery life.

  Apple Announces New MacBook Airs with Haswell Processors and 'All-Day' Battery Life