Hi there! I have a MacBook Air of 11-inch.
My MacBook has 9 hours of battery life on a single charge. That gives all-day power for making works, presentations, send emails, and other things. If you enable Power Nap, you´ll continue to receive new email and calendar invitations while the computer is asleep. All of this because of the compact all-flash storage. There´s plenty of room for a big battery, but it´s thinner and lightweight.
The laptop was designed to use less power and still deliver high performance. It has 8GB of RAM. It now supports ultra fast 802.11ac Wi-Fi. Wireless performance is up to 3 times faster that the previous generation. It has Bluetooth technology. For example, connecting your speakers to the computer via Bluethooth.
The part that makes the MacBook Air faster is the flash storage. It not only makes the MacBook much lighter and portable than others; it also makes it faster access to data. It has MultiTouch gestures in OS X that make everything you do more intuitive, direct, and fun.
I hope you enjoy it,