The 2013 MacBook Air Is a Battery Life Champ

Apple showed off lots of new goodies at WWDC 2013, including an update to the company's best-selling MacBook Air line

The 2013 MacBook Air — available in 11-inch or 13-inch sizes — now comes equipped with Intel's newest chipset and promises better battery life with improved graphics performance.

We tested the base model mid-2013 13-inch MacBook Air. It comes equipped with a 1.3GHz Intel i5 processor (2.6GHz turbo), 4GB of RAM and a 128GB solid-state drive. This model retails for $1,099, down $100 from the base 2012 13-inch MacBook Air

Customers can further customize the machine to include up to 8GB of RAM, a 256GB or 512GB SSD and bump of the processor from Core i5 to Core i7. As with previous generations, the MacBook Air is not upgradeable after purchase, so if you want to have more RAM or a bigger SSD, you need to make that decision when you buy.