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15" MacBook Pro i7 battery life mediocre

67759 Views 157 Replies Latest reply: Oct 28, 2010 2:43 PM by henkebarn RSS
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hypo luxa Calculating status...
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Apr 19, 2010 10:26 PM
I figured I'd post on the forums to let everyone know how I'm faring with the new MacBook pro i7. I love the machine, first off. It's fast!!!! However, the battery life is the most important aspect of a laptop to me and this particular battery leaves much to be desired as far as charge longevity is concerned. Just to give you some numbers....after about 3 hours of web browsing, I'm at fifty percent of battery charge capacity. That extrapolates to around 6 hours of total available charge. Brightness is set at 50 percent with wifi and Bluetooth on. Flash sites visited made up approximately 40 percent of the total quantity of sites visited. There was much browsing and skimming occurring and very little in depth reading. More of an aggressive approach to surfing the Internet. I just feel that the battery acts very uneven in it's discharge of energy with respect to the indicator that is given to the user in the form of the battery percentage / time remaining calculation. It seems to discharge very quickly during the first 10 - 15 percent (in a matter of 15 -25 minutes) and then evens off a bit. It seems to give a more instantaneous reading rather than a rolling average usage reading. It's definitely not 8-9 hours, that's for sure. Kind of disappointing given the advertisement.

Message was edited by: hypo luxa
MacBook pro 15" core i7, Mac OS X (10.6.3)
  • Graham K. Rogers Level 5 Level 5 (5,430 points)
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    Apr 19, 2010 11:17 PM (in response to hypo luxa)
    You have calibrated it?
    iMac 2.4 + MacBookPro 2.16 (2G RAM), Mac OS X (10.6.3), iPhone 3G, iPod touch
  • LordMerovingian Level 1 Level 1 (145 points)
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    Apr 20, 2010 5:54 AM (in response to hypo luxa)
    Don't tell me you +*actually believed*+ the 8-9 hour battery spiel the specs state??? Cut that in half and you're right about fine. 8-9 hours on a Core i7 CPU MBPro...Apple must be on some good stuff these days.

    Short of dimming the screen to blindness levels and practically doing nothing on the system, 8 - 9 hours was a stretch anyway and most of us know it. I feel your pain though.
    MacBook Pro 15" 2.2GHZ C2Duo 4GB DDR2 500GB HD, Mac OS X (10.6.2), Mac Mini (Late 2009) 2.26GHZ 2GB DDR3 160GB HD
  • markhimself Level 1 Level 1 (0 points)
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    Apr 20, 2010 6:01 AM (in response to hypo luxa)
    Mine is getting about 4 hours for just internet browsing. Brightness all the way down, wifi and bluetooth on. Pretty terrible.
    Macbook Pro 15'' (i7) -- iMac 24'' (Core 2 Duo), Mac OS X (10.6.3)
  • eww Level 9 Level 9 (52,975 points)
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    Apr 20, 2010 6:36 AM (in response to hypo luxa)
    hypo luxa: If you can get 6 hours of battery life while spending 40% of that time browsing Flash websites, that's no cause for complaint — it's outstanding! Flash on the Mac is a horrendous resource hog — true junk software. This is why the recently-released iPad was designed to preclude running any Flash content.

    The rate of drain of your battery will vary widely depending on what the computer is doing from minute to minute. If you're visiting a web site or sites with Flash content that you allow to run, your battery will be devoured at a blistering pace, but when you're just reading and writing email, very little power will be drawn. Leaving a Flash website running in a hidden browser tab or window while you do something else is like driving your car around town with a gaping hole in its gas tank: not something you want to do.

    The time-remaining display in your menu bar will vary even more wildly than the rate of battery drain, because it reflects a constantly changing estimate based on what the computer is doing at any given moment. It may predict 3 hours remaining whle you're visiting a streaming video website that also has Flash ads running, and 7 hours a few minutes later when you've quit your browser and are writing something in TextEdit. It will never be based on what you call a "rolling average" pattern of usage. For a much more dependable view of your battery's current condition, switch to the percentage-remaining display. That at least is an actual readout rather than a guesstimate.

    Apple didn't guarantee you 8-9 hours of run time doing anything you like. It described the conditions under which you could expect *up to* that kind of battery life: extremely light-usage conditions that are normal for very few users.
    15" '08 UMBP 2.4GHz/4G/250G; TiBook 1GHz/1G/120G, Mac OS X (10.5.8), liTouch 32G, scanners, projector, graphics tabet, laser & photo printers
  • Graham K. Rogers Level 5 Level 5 (5,430 points)
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    Apr 20, 2010 8:55 AM (in response to hypo luxa)
    I am getting mine tomorrow and will have a look myself. As another poster mentioned, perhaps these figures are with features off and in a dim light. I expect there are details in the small print.
    iMac 2.4 + MacBookPro 2.16 (2G RAM), Mac OS X (10.6.3), iPhone 3G, iPod touch
  • Chuckm747 Calculating status...
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    Apr 20, 2010 12:19 PM (in response to Graham K. Rogers)
    How does one go about calibrating his battery?
    Dell, Windows XP Pro
  • laundry bleach Level 5 Level 5 (6,875 points)
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    Apr 20, 2010 12:28 PM (in response to Chuckm747)
    Chuckm747,

    You can calibrate the MacBook Pro's battery using the steps found in [this Apple knowledgebase article|http://docs.info.apple.com/article.html?path=Mac/10.6/en/9036.html].

    Best of luck.
    PM G5, MBP 17", iMac 20", iPod 5G 30GB, iPod Nano, iPhone, Mac OS X (10.6.3), Time Capsule (2TB) WDS with AirPort Express
  • neilio Level 2 Level 2 (250 points)
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    Apr 20, 2010 12:35 PM (in response to hypo luxa)
    I have the same problem - the battery lasts (at best) about 3 & 1/2 hours to 4 hours with just web surfing and most decidedly non-intensive document editing, screen brightness 50%, bluetooth off, wifi on. All of this after calibrating twice and resetting the PRAM, as well.

    I brought the machine into the Apple store today and they're replacing the battery. We'll see if it was just a faulty battery or if there's a deeper issue.
    Mac OS X (10.6.3)
  • BeMcJo Calculating status...
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    Apr 20, 2010 12:39 PM (in response to neilio)
    Yesterday I fully charged my comp and then let it sit and drain at 50% brightness, bluetooth & sleep disabled and airport enabled. I did not use the computer at all. After 8hrs it was at 15% battery life.
    MacBook Pro 15'' 2.66, Mac OS X (10.6.3)
  • sapphir8 Level 2 Level 2 (160 points)
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    Apr 20, 2010 1:28 PM (in response to BeMcJo)
    Are you telling me that my 3 year old MacBook Pro has the same real world battery life as a shiny, new i5/7 based laptop? Muahahahahahahahahaha. Consider yourselves clowned by Chairman Mao ZeJobs.
    17" MacBook Pro 2.4 GHz Santa Rosa, Mac OS X (10.6.3)
  • Graham K. Rogers Level 5 Level 5 (5,430 points)
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    Apr 20, 2010 7:29 PM (in response to Chuckm747)
    Sorry about not getting back. Sleeptime over here, but I see that part has now been answered.
    iMac 2.4 + MacBookPro 2.16 (2G RAM), Mac OS X (10.6.3), iPhone 3G, iPod touch
  • Chuckm747 Level 1 Level 1 (0 points)
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    Apr 20, 2010 11:10 PM (in response to Chuckm747)
    Thanks Laundry Bleach! I will calibrate as soon as I can. Chuck
    MacBook Pro 15'' i7, Mac OS X (10.0.x)
  • Chuckm747 Level 1 Level 1 (0 points)
    Currently Being Moderated
    Apr 20, 2010 11:15 PM (in response to Graham K. Rogers)
    Thanks Graham!
    Dell, Windows XP Pro
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