Intel-based MacBook Air batteries show best-ever test results according to Macworld Lab

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Date: Thursday, June 20th, 2013, 06:02
Category: battery, MacBook Air, News

The new MacBook Air batteries have been tested.

And you’ll probably like the results.

Per Macworld, the Macworld Lab has completed its run of tests on Apple’s new battery for its updated Haswell-based MacBook Air notebook. And while Macworld Lab didn’t experience the 12-hour battery life cited by Apple, the tests do show that the new MacBook Air lasts considerably longer than before. The results were better than anything seen before by the lab.

The tests were run with the brightness set to maximum and made sure that automatic brightness adjustment was off, backlit keyboards were off, and Screen Saver was set to never start.

In the first test, the lab looped a movie clip in full screen mode with Wi-Fi disabled. The new 11-inch MacBook Air lasted 6 hours and 6 minutes, compared to just 3 hours and 34 minutes for the 2012 model. The new 13-inch standard configuration MacBook Air lasted 8 hours and 18 minutes, 36 percent longer than the new 11-inch MacBook Air, and 65 percent longer than last year’s 13-inch MacBook Air. Compared to a 2013 13-inch Retina MacBook Pro, the 13-inch MacBook Air lasted 75 percent longer.

The lab also ran the tests on “ultimate” configure-to-order (CTO) MacBook Air models from this year and from last year. There wasn’t too much of a battery life hit on the new CTO model compared to the standard configuration; the standard configuration model lasted just 11 minutes longer than the CTO unit that has a faster processor, more RAM, and twice the hard drive capacity. Comparing this year’s CTO “ultimate” to last year’s, they saw that the new model lasted 65 percent longer.

The second run of tests used Futuremark’s free Peacekeeper browser test, which has an option to run the online test repeatedly and report the time at which the system being tested stops responding. This test is much more taxing than the movie playback, using more of the system’s memory and processor. Hence, the lab found that the notebooks couldn’t last as long when running the Peacekeeper test, but did find that the performance still scaled as expected.

In the Peacekeeper tests, the new 13-inch standard configuration MacBook Air lasted the longest at 5 hours and 45 minutes, which was 2.5 hours less than in the movie test. The new 13-inch standard configuration model lasted 41 percent longer than the new 11-inch model and 25 percent longer than the new CTO MacBook Air. It should be pointed out, however, that the CTO Air outscored the new stock 13-inch MacBook Air by about 20 percent in the tasks that Peacekeeper repeatedly runs during its battery test. The new standard configuration 13-inch Air lasted 63 percent longer than last year’s 13-inch MacBook Air and 67 percent longer than the 13-inch Retina MacBook Pro.

The increased battery life is the result of two under-the-hood changes to the MacBook Air. First off, there is more battery capacity. iFixit’s teardown demonstrated that the new models using slightly higher capacity batteries. Second, the new MacBook Air has also switched from using Intel’s third generation Ivy Bridge Core processors to fourth generation Haswell processors. A key difference between the generations is decreased power consumption, which results in increased battery life on the portables it powers.

If you’ve picked up a new Haswell-based MacBook Air notebook and have any feedback about its battery life, please let us know about your experience in the comments.

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