Even Better Battery Life

I've never had such a great balance of performance and battery life as my previous generation unibody MacBook Pro. Whatever Apple is doing under OS X to deliver great idle battery life really does pay off. If you're not constantly pegging the CPU, OS X can deliver some incredible battery life.

It does get better with Arrandale. Remember with the Core 2 processors you couldn't actually shut off the cores if they were idle, they'd still leak power. Thanks to Arrandale's power gating, if a core is idle, it can effectively be shut off completely. In other words, battery life in situations where there's lots of idle time (e.g. read web pages, writing) should improve.

To test this theory I ran our standard wireless web browsing test:

Light Web Browsing

Here we're simply listing to MP3s in iTunes on repeat while browsing through a series of webpages with no flash on them. Each page forwards on to the next in the series after 20 seconds.

The display is kept at 50% brightness, all screen savers are disabled, but the hard drive is allowed to go to sleep if there's no disk activity. The wireless connection is enabled and connected to a local access point less than 20 feet away. This test represents the longest battery life you can achieve on the platform while doing minimal work. The results here are comparable to what you'd see typing a document in TextEdit or reading documents.

As expected, the new MacBook Pro delivers a 10.5% increase in battery life. Not all of this is due to the more efficient CPU/GPU however. The 15-inch MacBook Pro has a larger battery than before (77.5Whr vs. 73Whr).

It's not all rosy though. The larger battery was used in part to make up for the fact that Arrandale, while more efficient at idle, can draw more power under load than Penryn. The Core i5 can be noticeably faster than last year's Core 2 Duo, but in allowing you to do more it can run the battery down quicker.

In our original Arrandale review we found that battery life can actually decrease with the new platform under certain conditions. Our heavy multitasking test shows the same can happen under OS X:

Multitasking Battery Life

Our final battery life test is the worst case scenario. In this test we have three open Safari windows, each browsing a set of web pages with between 1 - 4 flash ads per page, at the same time. We're also playing an XviD video in a window all while downloading files from a server at approximately 500KB/s.

It's not a large drop, only a couple of percent, not even noticeable. But you shouldn't expect battery life improvements across the board with the new MacBook Pro.

The GeForce GT 330M Bigger Power Bricks, Warmer Laps
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  • anactoraaron - Thursday, April 15, 2010 - link

    Arrandale CULV 13-14" 1440x900 res with discrete ATI 5770mobile + GPU switching.... Imagine having up to 10+ hrs battery life for light internet, word processing work related tasks, being able to watch 2-3 dvd's on battery and then plugging in to game on very high for almost every game! CPU would be 1.3-1.5ghz on battery and "prefer" to run everything single threaded and would run upwards of 2.0ghz "preferring" to be multi-threaded plugged in. That's what I'm waiting for.... the next gen of CULV + Centrino. Can't wait.

    By the way, it's pretty sad that even you Anand are making comments on Apple's prices (since you love Apple the way you do). Guess all relationships that are good eventually become more "Love-Hate"
  • l0ts - Thursday, April 15, 2010 - link

    I Wonder what difference can You find between GT330M and GT240M.
    I checked my GT240M in GPU-Z and looks like i got "GT330M "with higher clocks. In six months i'll probably have GT420M. :)
    Thanx NVIDIA!
  • Jamahl - Thursday, April 15, 2010 - link

    Who buys this overpriced garbage?
  • TEAMSWITCHER - Thursday, April 15, 2010 - link

    Myself, and a lot of people. I have a late 2006 MacBook Pro that was the first with a Core 2 Duo chip. I have been waiting for the first MacBook pro with a Core i5/i7 processor. This new machine looks exactly like the replacement I have been waiting for. Thank you Anand for the great (and very timely) review.
  • ppayne - Sunday, April 25, 2010 - link

    I buy Macs and am happy to. I run a business and the improved reliability of the Mac means they pay for themselves very quickly. I use my laptop about 8 hours a day (that's on top of my normal work, which I use a Mac Pro for) and any improvement in my workflow is worth a paltry $2000 to my company. If we had PCs at my company I'm sure we'd have a tech guy on payroll who kept things running by now (15 employees). Since I can literally take a hour a month to go around and make sure all updates are run on our Macs instead, there's a pretty clear savings over options we could choose (Windows, "free" Linux etc). Time, convenience, and reliability are actually worth *some* money you know?

    Not everyone is a college student/hobbyist/penny pinching type, although clearly you (and other commenters here) are hating for the sake of hating. For the record, I do PC software development and database work on the Mac and love the irony of not having to keep crap PCs around work to get work done.
  • rumimonkey - Thursday, April 15, 2010 - link

    I'm curious for Anand's (or others') thoughts regarding the glossy screens... I'm looking to get my first MBP, and would prefer the 13" (in spite of the C2D). However, I was hoping for a matte option on the smaller model. Is this litmus test really good enough: indoor = glossy, outdoor = matte? I want the 13" because I'd like to be truly mobile, and thus will be beholden to variable lighting conditions. And so if I'm in a public (indoor) place trying to write or read online, what will my experience be? Or if I'm working on the couch at home with the blinds open (hey, I like sunshine), would the gloss drive me bonkers and cause eye strain? Thanks in advance to all who (hopefully) respond with comments and recommendations.
  • kmmatney - Thursday, April 15, 2010 - link

    I have a Dell with the upgraded, glossy screen, and its great in all situations indoors. As long as you can avoid any direct reflections from light sources, a glossy screen is much better indoors, IMO. I've been able to use mine outdoors as well - just need to find some shade.
  • T2k - Thursday, April 15, 2010 - link

    ... and you can answer your question, which one to get. :)

    http://bit.ly/acer750
  • quiksilvr - Thursday, April 15, 2010 - link

    Actually, if you get the base 15" model, its $150 extra, because they don't offer 320GB HDD at 7200rpm.

    That is a complete insult. Not only are these things ridiculously overpriced (and their performance isn't even that great for the price either), their upgrades are an insult. Its not like these are magical iPod HDDs. These are the SAME HDDs available on HP and Dell computers. At HP, you can upgrade from a 160GB 5400RPM HDD to a 250 7200RPM HDD for only $30.

    And don't even get me started on their lack of ports. No SD slot on the 17" model? No eSATA? No Blu Ray? Correct me if I'm wrong, but aren't these laptops intended for the PROfessional field?
  • ReaM - Friday, April 16, 2010 - link

    I agree with you.

    I have had 10 macs in my life, currently macbook pro and imac.

    This update is ridiculous. The extra cost for the - what now is standard display - is hilarious.

    The only update worth considering is the base 13 inch. But still no i5 nor i3 in it and no display bump up.

    As I wrote, for 1700 buck you can build i7 980X system (hackintosh, if you will) - just as a comparison.

    The current macs are not worth the money.

    Last worthy update was the when unibodies were introduced. But since then, two years went by and nothing changed, except of higher price

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