Best battery life for a laptop?

We all know that laptops usually have a 3hr battery life or less. But this does not happen with Apple's MacBook Air 13 inch. The Intel 4th generation CPUs help the laptop achieve the best battery life. Its battery life can last for 12 hours and maybe even more.

The features:

• 12 hr battery life
• 720p FaceTime HD Camera
• Dual mics
• Multi-touch trackpad
• Up to 3 times faster Wi-Fi
• 4th generation Intel Core processors