https://www.cnet.com/news/macbook-air-2018-retina-display-touch-id-1199-available-nov-7/

The new hardware combination promises up to 12 hours of web browsing and up to 13 hours of iTunes movie playback. Apple also added one of its T2 security chips for Touch ID and Siri support, and the most secure boot process of any notebook, Apple says. The T2 also features an SSD controller that has automatic, on-the-fly data encryption.

Other additions include a third-generation butterfly keyboard, paired with a Force Touch trackpad; a FaceTime HD camera and a three-mic array for better voice recognition; and louder stereo speakers with more bass.