For those worried about non-removable batteries...

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ssquirrelssquirrel
Posted:
in Current Mac Hardware edited January 2014
http://anandtech.com/mac/showdoc.aspx?i=3580&p=1



Anandtech has done a review of the new MBP's power usage. All tests were done using the new 15" MBP. 8 hours of battery life on very light web usage. So even better than the 7 Apple claimed. Very cool. Are we sure there is still a need for removable batteries?

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  • Reply 1 of 5
    irelandireland Posts: 17,802member
    I'm sure they are good, but Gizmodo didn't get as much as that.



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  • Reply 2 of 5
    ssquirrelssquirrel Posts: 1,196member
    For comparison purposes.



    Gizmodo's testing: 2.8GHz 15"

    "We used the same metrics as the previous MacBook Pro test—medium brightness, Wi-Fi on, keyboard backlight on low, H.264 movie—and got about an hour more on each machine." 3h46m





    Anandtech's testing: 2.53GHz 15"

    Light test:"The wireless web browsing test uses the 802.11n connection to browse a series of 20 web pages varying in size, spending 20 seconds on each page (I timed how long it takes me to read a page on Digg and came up with 36 seconds; I standardized on 20 seconds for the test to make things a little more stressful). The test continues to loop all while playing MP3s in iTunes." 8h8m



    Harder test:"I threw together another test just to make sure. The key flaw in my initial wireless web browsing test is that it none of web pages have any Flash on them. While constantly loading web pages will ensure the CPU can't go into deep sleep, Flash on the pages would make sure that the CPU utilization remains higher at all times. The next test I put together was this:



    I strung together 8 reviews on AnandTech and put them each on a single page, images and all. I then scoured the web for big, animated Flash ads and added anywhere from 1 - 4 ads per page; all Flash. Each page is designed to forward to the next after 10 seconds and the loop continues indefinitely. On each machine I opened three Safari windows and pointed them at the first page in the sequence. In the background, once more, I had iTunes playing MP3s." 6h29m



    heavy test:"This is my heavy workload benchmark.



    For this benchmark I'm downloading 10GB worth of files from the net (constant writes to the drive), browsing the web (same test as the first one) and watching the first two episodes of Firefly encoded in a 480p XviD format (Quicktime is set to loop the content until the system dies)." 4h55m



    It's very interesting. 1)very large discrepancy in the battery life between the 2 websites performing the tests. 2)the different levels of the tests. I think anandtech was far more thorough, but I do have to wonder just what was going on between those test systems. Now, the gizmodo MBP was a faster processor, so it likely burned more power, but not THAT much more.
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  • Reply 3 of 5
    irelandireland Posts: 17,802member
    Great find, thanks!
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  • Reply 4 of 5
    irelandireland Posts: 17,802member
    Update: "Wow."
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  • Reply 5 of 5
    addaboxaddabox Posts: 12,665member
    Also probably worth point out that, as can be seen in the iFixit 13" unibody teardown, replacing the battery involves removing 10 phillips screws to get the entire bottom off and a couple of "triwing" screws to remove the batt.



    Not as easy as popping out a standard replaceable battery, but not rocket science, by any means. I don't see any reason why Apple couldn't offer "while you wait" battery replacement at the Genius Bars, and for a lot of owners it will probably involve ordering a replacement online and doing it themselves. Doing this once every 5 years shouldn't be too much of a burden.
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