Honestly, for me, this is by far the most important part of the review. With there being not much in the way of performance upgrades or new features compared to previous generation Airs, the battery life improvement is basically at the heart of what makes the new Air attractive. Obviously, this isn’t exclusive to just Apple—any Haswell ULT Ultrabook with 40-50Wh of battery capacity should get you 8-10 hours of battery life.

Tablet Web Browsing Battery Life (WiFi)

But it’s honestly amazing to use a fully fledged notebook that can battle Atom and ARM for battery life. The image from Anand’s 13” Air review showing an estimated 16 hours of battery life was awesome, even if the OS X battery runtime estimate tends to be wildly optimistic in the early part of a battery cycle. The 11” isn’t quite that far, but it still has better battery life than my iPad. Granted, my 3rd-generation iPad now has a year of wear on the battery, but still—it’s longer lasting than my iPad was when new, and it’s also longer lasting than the 4th gen iPad. And not just by a little, it’s a pretty significant step up. That’s a really important corner to turn for the notebook market, double digit battery life without having to resort to an extended or secondary battery like some business notebooks have offered in the past.

As Anand covered in his recent Haswell ULT battery life article, Intel still needs to work on the power efficiency of the Haswell video decode engine, since ARM-based SoCs still hold a sizable advantage there. But other than that caveat, the overall power consumption of Haswell is an absolute game changer. I’ve never even thought to take the power cord with me anywhere in the month that I’ve had it. Want to take the Air for a weekend away and not plug it in once, iPad style? Depending on how much of your usage can get pushed to a smartphone, that’s a legitimate and realistic possibility.

The 11” Air, by virtue of its smaller display, is slightly more efficient than its larger sibling, but the 42% advantage in battery capacity pushes the 13” Air’s battery life into the insane range. Being able to rely on nearly 10 hours of battery life or more in most normal use cases is just ridiculous. The 11” is a bit less phenomenal, but anything that can claim better battery life than the iPad, even with a smaller battery, is doing just fine.

Light Workload Battery Life

Medium Workload Battery Life

Heavy Workload Battery Life

At 8.5 hours dead on in our usual Mac light browsing test, the 2013 11” is three hours ahead of the 2012. That’s 54.5%. It’s nuts, the end. That advantage holds basically through the rest of our more strenuous battery life tests. The previous 11” really had an issue with battery life—the real-world 5 hours of runtime just didn’t cut it given the sacrifices made for mobility; it made much more sense to get a 13”. Now, with 8+ hours of runtime, it’s easier to ignore. The jump from 5.5 to 7.5 hours of battery life makes a pretty significant difference in how the system gets used, but I’m less sure about the difference between 8.5 and 11. Once you’re already in that 8-10 hour battery life range, adding two or three hours on top of that is a lot less valuable than it would be in a situation where you’re adding that amount to get to that range. This isn’t to say that more battery life isn’t always better, just that at some point it becomes something that is nice to have rather than something that changes the essence of the system, almost like the difference between an i5 and an i7 CPU.

2013 MacBook Air 11" - Introduction and Hardware CPU Performance
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  • KPOM - Friday, August 9, 2013 - link

    Maybe. We need to see the design. The current Surface Pro is too big to be a good tablet, and too small to be a good notebook. 10.6" 16x9 is a bit cramped, even more so than the 11.6" screen on the MacBook Air. At the same time, 2lbs is bulky for casual tablet use. An iPad Mini or Nexus 7 with an 11" MacBook Air or 13" Ultrabook may be a better combination than any attempt at an all-in-one. But if the Surface Pro can lose 0.5 lbs while improving battery life, it might have a shot.
  • Impulses - Saturday, August 10, 2013 - link

    Meh, it'll still be too small as a laptop and too big as a tablet... Convergence just isn't that big a deal to mospeople, unless you travel or move around constantly and you always find yourselflpacking both laptop and tablet.
  • flyingpants1 - Friday, August 9, 2013 - link

    What is the best-case scenario idle battery life? Brightness at 0%, no wifi, CPU idle with the screen ON all day. Think it would top 20 hours?
  • solipsism - Friday, August 9, 2013 - link

    What would be the usefulness of such a test?
  • seapeople - Monday, August 12, 2013 - link

    Playing solitaire in the car at night on a long road trip. Seriously, I've done this quite a bit. When it's dark in the car, no need to run 200 nits, or have wireless on, and you're effectively not using the CPU. The hardest part is still paying attention to the road. (Just kidding on the last one)
  • nerd1 - Friday, August 9, 2013 - link

    Yet another MBA review? Come on, there are tons of new interesting laptops around (vaio duo 13, Clevo 230ST, MSI gs70, lenovo 15.6" with 760M SLI ETC) and we're seeing boring MBA review ever and ever and ever?
  • KPOM - Friday, August 9, 2013 - link

    The 11" MacBook Air is one of the few 11" notebooks out there. For whatever reason, apart from hybrid tablets, the Windows market has largely ignored this form factor. Therefore, for someone looking for a "real computer" the size of a tablet it is one of the few options out there.
  • nerd1 - Friday, August 9, 2013 - link

    You are missing the fact that MBA has HUGE bezel so it actually has smaller screen than its size. Many other oems (samsung, sony, LG etc) are putting 12.5" or 13.3" screen to similarly sized and weighted laptop as MBA 11.
  • KPOM - Friday, August 9, 2013 - link

    There are a few, but most of the 12.5" or 13.3" Ultrabooks are still physically bigger than the 11.6" MacBook Air.
  • fhmuffman - Friday, August 9, 2013 - link

    Vivek, did it occur to you to attempt to drive a 4k display? I have been trying to find info on this. Anandtech as been very helpful in the past but anything relating to the Thunderbolt ports (page 11 of the June '12 rMBP review) has been missing in the last two MBA reviews. Does the MBA use a half Redwood Ridge solution like the previous models did with Cactus Ridge, and therefore can't drive a 4k display?

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