Battery Life

The MacBook Air sees no increase in battery capacity over the previous generation, as a result any improvement in battery life boils down to what we get from Ivy Bridge. I'm stuck rebuilding the battery life results database from scratch now that I've built a new suite of tests for OS X. I've run all three generations of 11-inch MacBook Air through the new suite but I don't have numbers for the older 13-inch MBAs unfortunately. As I mentioned in the rMBP review, the new suite is designed to give accurate data points at three usage models: one light, one medium and one heavy. The combination of all three should give you an idea of the behavior of these systems on battery.

Across the board battery life of the 13-inch MacBook Air is actually quite similar to the Retina MacBook Pro, just from a much smaller battery and without the variability introduced by the rMBP's discrete GPU. If anything the lack of a discrete GPU makes using the MacBook Air much simpler from a battery life perspective. As much as I love Cody Krieger's gfxCardStatus application, it's nice not having to keep an eye on it to see if something silly has triggered the dGPU.

Light Workload Battery Life

Under light usage the new 13-inch MacBook Air is easily able to meet Apple's claim of 7 hours of battery life. The 11-inch model does the same to its 5 hours rating, beating it by the same 30 minute margin as the 13.

Medium Workload Battery Life

The medium workload thins the herd a bit, with the 13-inch Air still coming out on top but at 5.35 hours. The 11-inch Air drops below 4 hours, which is an improvement over the previous two generations of 11-inch Airs. Once again we see an example of Ivy Bridge doing better than Sandy Bridge when it comes to mobile power usage.

Heavy Workload Battery Life

Under heavy load is really where we see Intel's 22nm process deliver the gold. Here both of the 2012 MacBook Air models do very well. With the 13-inch MBA significantly outpacing even the rMBP with its 95Wh battery, while doing the exact same amount of work.

The 13-inch MacBook Air continues to be Apple's best notebook for those who care about battery life. The 11 offers portability but you do take a significant hit in battery life.

Power Consumption & Thermals Final Words
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  • EnzoFX - Monday, July 16, 2012 - link

    but it's so cool to hate apple! Some people just can't stand when Apple has the overall better package. The thing I don't get with these haters is that they never, ever understand half the story. They get caught up in specs, they don't see that Apple consistently has solid drivers and software that other's solutions pale by comparison. Take touchpad drivers, they are still hit or miss, and not as good as Apple's Laptops. Those easy to get going apps? Well what do you think the average consumer wants? Actually, who doesn't want easy to set up? What good is an amazing camera if it has a cumbersome application to go with. I'm not saying one thing is more important than the other, just that it's all about the overall package, people like him clearly miss the more important components of it.
  • Sunburn74 - Monday, July 16, 2012 - link

    Its not hating apple. More like how an increasing number of reviewers walk in with pre-established beliefs concerning apple and those subconcious beliefs are evident in their writing. Its kind of like having a thing for blondes and then being a reviewer of good looks at a modeling contest. You can try your best to be perfectly objective, but geez your preferences will come out, especially to people who don't give a care about hair color or even more so to people who prefer brunettes and etc.

    Anand may not believe it (the people on engadget as well, and the verge is horribly pro apple), but he has pre-determinined beliefs about apple (like we all do) which come out in his writings. Just think about it like this. Anand's primary machines are macs. If he were to say mac's are crap, he'd be slighting himself in a way. I realize saying macs are crap are the extreme, but the point is the same. Saying something negative about apple is saying something negative about himself.
  • KPOM - Tuesday, July 17, 2012 - link

    It's true the other way, though. Read the Macalope column in Macworld and you'll see examples of some of the nonsense put out (Katherine Noyes is a frequent target).

    Anand is pretty upfront that he uses Apple devices. However, he did point out the weak spot in the 2012 MacBook Air, which is that the display hasn't evolved along with the rest of the device. Otherwise, it's hard to argue with their choice of components. The keyboard and trackpad are still top notch (only now, about 4 years after Apple, are Windows OEMs starting to get multitouch trackpad drivers running smoothly, for instance). The SSDs are Samsung or SandForce based (in line with the industry). They are offering 256GB and 512GB SSD capacities (which are rare), an 8GB RAM option, and the 2.0GHz Core i7 option (many others are topping out at 4GB and the 1.7GHz or 1.9GHz i7). The camera and wi-fi components are competent. Objectively, it is difficult to argue that the MacBook Air isn't one of the higher end ultraportables.
  • mavere - Monday, July 16, 2012 - link

    Anand states that the MBA is a top-tier competitor in the ultrabook market. Unless you care to refute that conclusion, the obvious implication is that Good >> Bad, which was the exact tone of the review.

    Five pages of bashing trivialities and concluding with "oh I guess this is one of the best products in its category" (not exactly a controversial statement here) would have served no one.
  • Freakie - Tuesday, July 17, 2012 - link

    Yet other Anandtech writers do EXACTLY that. They will nit-pick over very many small "trivialities" but they will not go and use them to say that it is a crap product. There is a difference between objectively reviewing a product and then acknowledging its stance in the market, be it one of the best or one of the worst, and writing like a fanboy.
  • Galatian - Monday, July 16, 2012 - link

    On a side note I actually also did not see any improvement in camera to my MacBook Pro 15" from 2008 which was still the normal "SD" quality...then again I never used it for anything anyway...

    I just checked out: I do have the Samsung screen but Toshiba SSDs...The boot time IS amazing. Being able to work within 20s from pushing the button is invaluable to me, not that i got used to working my new Air.

    By the way Anand: Am I just stupid or did you say you were going to post the screen profiles?
  • GotThumbs - Monday, July 16, 2012 - link

    I totally agree.

    Objectivity and Independence is missing in this "Review".

    Endorsement is more like it " buy the 11."

    I've been Reading this site for over 9 years. Very disappointed with Anand.
  • uhuznaa - Monday, July 16, 2012 - link

    Well, either Anand is mutating into an Apple fanboi or these things are really just good. Judging from the benchmarks and the pure facts (as well as my own limited experiences) I tend to the latter.

    [BTW, what's up with the login here? Neither Chrome nor Firefox are able to save and restore my password here. This really is getting on my nerves since I use strong, unique passwords everywhere and looking it up every fscking time I want to post a comment is somewhat uncomfortable.]
  • EnzoFX - Monday, July 16, 2012 - link

    Works with 1Password =p.
  • Anand Lal Shimpi - Monday, July 16, 2012 - link

    The FaceTime HD camera in the MBA appears to be one of the best out there, at least in what I've seen compared to most notebooks. My point wasn't to balance out the negative, but rather put it in perspective. The comment about needing good lighting applies to every single integrated webcam shipping in a notebook today.

    The same for WiFi. The MBA's WiFi is competitive with everything else in its class, no one offers anything better in this chassis size while many offer something worse. Until recently many Ultrabooks were still shipping 1x1:1 configurations. The 3x3:3 setup is just something you get when going to the more expensive Pro models.

    The real disappointment here is the display, not in that it's bad but that it's not as good as the new bar set by the ASUS Zenbook Prime.

    Take care,
    Anand

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