With the wireless off, the 13" mba should do that http://www.everymac.com/systems/apple/macbook-air/macbook-air-faq/macbook-air-mid-2011-real-world-battery-lif

With the wireless off, the 13" mba should do that http://www.everymac.com/systems/apple/macbook-air/macbook-air-faq/macbook-air-mid-2011-real-world-battery-life-core-i5-core-i7.html http://www.everymac.com/systems/apple/macbook-air/macbook-ai... http://store.apple.com/us/configure/MC965LL/A http://store.apple.com/us/configure/MC965LL/A? $1300 Ubuntu installs on them fine.