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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  • MrJim - Tuesday, July 17, 2012 - link

    Thanks for the reply sir!

    I would like "ultra small form factor removable DRAM standards" and i think many of us would. But it also seems for me that this is part of a corporate strategy, car makers have done this for years. "You can only buy stuff from us, good quality we promise, and of course alot more expensive than some of the other 200 makers of that perticulur car engine part".

    To say the least for changing batteries. And i did expect you to sit on information that we ordinary people doesnt have. Im looking forward to the future, but i like choice thats all.
  • Karltheghost - Tuesday, July 17, 2012 - link

    Sure you're right. If i buy a Notebook, it is less serviceable than a full size desktop PC. And if i buy an Ultrabook it is even less serviceable. But being able to change the only wearing part in an expensive part of Elecronics, that is not likely to last as long as the rest of the Laptop is the least i want to do. By the way it's the same for Smartphones. I just don't want to buy a product which i need to replace completely if the battery wears out because i cannot change it myself and having it replaced is nearly as expensive as a new Laptop/Smartphone. And because there are manufactors who sell Smartphones and Ultrabooks with changeable batteries, your argument, as far as it goes to batteries, is not very convincing. As for other parts you're right, demanding switchable CPUs or something like that in an Ultrabook would be hilarious.
  • KPOM - Tuesday, July 17, 2012 - link

    There are more and more Ultrabooks sold with non removable batteries now. The Samsung Series 9 is one example.
  • Tegeril - Monday, July 16, 2012 - link

    "Very disappointed Anand. Very disappointed with you."

    Hilarious.

    The MBA is still a class leading entry in the ultraportable market. It no longer wins in every single category (see: display), but that does not mean it is not a great system.

    You ignore things like consumer SSDs being consumer SSDs in large packages without custom manufacturing. Apple's memory upgrades have always been more expensive than retail and have actually come closer to reality recently. But again, this is not a stick of mass produced memory, it's not an apples to apples comparison. As far as overcharging in any other area of the system, you fail to accurately include chassis, trackpad, magsafe, and other superior elements that can't be compared in the way you want to do spec to spec comparisons.

    Being melodramatic about this review is what's disappointing. It very accurately describes why Apple is selling these and their pro systems so much more successfully than in the past. They're very good systems.
  • KoolAidMan1 - Monday, July 16, 2012 - link

    The Apple haters are out in force, as usual.

    So mad.
  • Karltheghost - Tuesday, July 17, 2012 - link

    So everyone who criticises Apple is automatically a hater? Seems like you're as differenciating as the haters . . . In fact, there are plenty of people out there who had an apple product and are therefore not very fond of apple. For example i bought an Ipod because i wanted a good Mp3-player. It did everything except from playing Mp3s in a proper way and i wasn't the only one who had this issue (Referring to an Ipod nano 3g, the bad sound without equalizer and the scratching noises with equalizer turned on).
    And i know a lot of people who sold their Macbook Pros 2 weeks after purchasing and bought regular windows machines because there are flaws that the technical specs don't reveal . . .
  • KPOM - Tuesday, July 17, 2012 - link

    "Macs are garbage and I should know because I bought an iPod once and it didn't work right, plus my friend returned a MacBook Pro 2 weeks after buying it." These are anecdotes.

    It's OK to criticize Apple. Heck, the original MacBook Air got a lot of criticism from hard core Mac fans when it first came out. However, few company's products inspire the fierce criticism that anything Apple puts out does.

    I get the sense that if Apple stuck its logo on hardware completely identical to an ASUS Zenbook or Samsung Series 9, there would be 6 pages of comments on this site from many of the Apple bashers criticizing every little flaw, but when the actual product reviews come out those same people won't be posting anything but praise for the product.
  • Karltheghost - Tuesday, July 17, 2012 - link

    Of course that are anecdotes, hence i wrote "For example" at the beginning . . .
    But actually i rely more on my personal experience and that of others, by whom i know what they're doing with their stuff than on some fanboyspeech (this is not intendet as criticism for this review). What i can say is that i made bad experiences with apple and friends too and there are much more bad experiences than good ones. So i am very sceptical. On the other hand i had very bad experiences with other brands too (e.g. i had 2 HP Notebooks that lastet less than 3 months), but there are plenty of others who hadn't problems for years. So what i'm referring to is kind of a good/bad-balance . . .

    It's not that i wouldn't buy a product just because it has an apple on it. In fact i would buy one if it fulfills my needs. But as long they're charging premium prices for machines that you can literarily throw away as soon the warranty runs out and have horrible software restrictions i'll stick with the bulky, ugly things that other manufactures are producing
  • KPOM - Tuesday, July 17, 2012 - link

    What makes an Apple a throwaway product after a year? It still functions. My sister has a 2006 MacBook that is in almost new condition (though she hasn't used it much since getting a 2011 MacBook Air).

    Also, there are no software restrictions on OS X. Even with Mountain Lion, you can purchase and install your own software. This isn't iOS or Windows RT, where you must purchase from an App Store. The Mac App Store is optional.

    Sure, it won't run Windows as good as a PC with the same specs will, but it will run pretty well. I think what most Mac users who run Windows find is that over time, they use Windows less and less, perhaps just for that old program that just doesn't have a Mac equivalent. Heck, even Windows 7 includes an "XP Mode" to run XP in virtualization, so it isn't unique to the Mac. I can quibble a lot about how Microsoft has "crippled" support for 16-bit apps, or how the 64-bit version dropped support for some old peripheral that worked just fine in XP.
  • Karltheghost - Tuesday, July 17, 2012 - link

    Just personal experience. After 2 Years or so most products get faulty, even if it's just the battery or a fan. On most Apple products you can't change that yourself as it's tightly integrated in the system and for example, a friend of mine payed 170€ just for a new iphone battery . Thats a financial write-of.

    With software restrictions i was referring to the windows/linux thing. The only reason windows runs slow is that apple provides bad drivers so you stick with osx.
    A bunch of horses won't get me to use OSX, i tried it once and it felt like a cage where the restrictions are covered by a lot bling-bling animation. While there are some nice things about it, like the touchpad integration you have even less system access than under windows. Nothing to convince a linux user and also nothing to replace windows on the gaming machine ;)
    The license agreement does the rest (yeah, i actually read that thing)

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