Glassbook Pro - Disappointing Battery Life

Discussion in 'MacBook Pro' started by Elotemuygrande, Nov 3, 2008.

  1. Elotemuygrande macrumors newbie

    Nov 3, 2008
    Two weeks ago I took home a new 15" MBP. Other than minor cosmetic style issues the only issue I've had is poor battery life.

    She's a 15.4", 2.4Ghz, 4GB RAM, 320GB 7200RPM drive.

    I have bluetooth turned off and just browsing the web I'm getting maybe 3:15 of battery life. I pretty much just have Firefox and Adium up. I also turned tried turning the screen brightness down to 30% or so.

    My late model white macbook was probably getting a full hour more of unplugged action.

    I have "Better battery life" set which I believe should turn off the 9600m. I performed the steps in the calibration KB article last night. Coconut battery says my battery capacity is 4764 mAh which is higher than the rated capacity.

    Is there anything else I can check? I thought people were doing much better than this on average from what I've read!
  2. rychencop macrumors 65816


    Aug 17, 2007
    did you calibrate it? i'm not impressed with mbp batteries at all. i have had my battery less than a week and health is 95% already.
  3. coolkamio macrumors newbie

    Jul 16, 2002
    The problem is the 320Gb 7200RPM drive..
  4. blurb23 macrumors 6502a

    Feb 25, 2007
    No, I've got the stock 2.4 model, and I'm lucky to get about 4 hours of battery life. Haven't been able to get the full "5 hours of wireless productivity" that Apple advertised as of yet.

    By "wireless productivity", did they mean literally wireless? As in, no connectivity? No WiFi, no BlueTooth, etc etc?
  5. Elotemuygrande thread starter macrumors newbie

    Nov 3, 2008
    Plausible, however I read on these forums before purchasing that the 7200rpm drive used little more power than the 5400rpm. Also, the HD should be virtually inactive when just browsing the web.
  6. Elotemuygrande thread starter macrumors newbie

    Nov 3, 2008
    Exactly! Me too. Wonder if N mode wireless uses more power. I'll have to check life with WiFi turned off...
  7. ayeying macrumors 601


    Dec 5, 2007
    Yay Area, CA
    "Testing conducted by Apple in October 2008 using preproduction 2.4GHz Intel Core 2 Duo–based MacBook Pro units with a Better Battery Life setting. Battery life depends on configuration and use. See for more information. The wireless productivity test measures battery life by wirelessly browsing various websites and editing text in a word processing document with display brightness set to 50%."
  8. masse macrumors 6502a


    May 4, 2007
    just don't check your battery health and it wont bother you so much.

    F apple for reducing the capacity. Doesn't bother me really except they didn't reduce the price.
  9. Elotemuygrande thread starter macrumors newbie

    Nov 3, 2008
    I actually figured something out that made a huge difference. In both Firefox and Safari, the browser will stay at a constant 18-20% cpu after viewing ANY Flash even after the video stops and the page is closed. This is with the latest Flash 10. Disabling Flash in my browser takes me back down to ~5% ongoing CPU usage with a lot of sites open which makes the battery time left show almost 5 hours.

    Note, I tried several times and using the Flashblock extension was NOT enough, I had to completely disable the Flash plugin.

    Sucks for youtube... My next project is figuring out how to download youtube videos instead of watching with the GD Flash plugin.

    I also noted that the Flash plugin for Opera used roughly HALF the CPU of Flash for Firefox and Safari for some reason...not switching to Opera though...
  10. bcaslis macrumors 68020

    Mar 11, 2008
    I've seen a similar thing happen also. I've found that I have to empty the cache in Safari to get the CPU usage back down. It also seems to me that it's not any flash, some sites cause this to happen and some don't. I don't know what the pattern is, but it sure seems like Flash 10 causes this to happen.

    How did you "disable" flash in the browser? The only way I know of is removing the plug-in from the plug-in directory.
  11. 840quadra Moderator


    Staff Member

    Feb 1, 2005
    Twin Cities Minnesota
    Download them using

  12. Elotemuygrande thread starter macrumors newbie

    Nov 3, 2008
    Fixed my battery life issues!!!

    Got Firefox to stop keeping Flash vids loaded forever which was continually eating CPU. I now get the ~5 hours promised :)

    I realize that Flash videos naturally eat video, but the issue was that they kept eating it for hours after the tab where the video was playing was closed.

    Safari has the same irritating behavior so Apple must have done there "wireless productivity" tests using only sites which contain no flash video content...
  13. brop52 macrumors 68000


    Feb 26, 2007
    Yeah flash is a battery eater.

    Also, for those of you that don't use IR turn it off in the security system pref and bluetooth. That should give you extra life.
  14. MBPDiva macrumors regular

    Nov 1, 2008
    on Orion's Belt
    Great tip! I don't run FF on my MBP (known resource hog). But how do you configure Safari to stop caching the flash videos?

    Btw, I always clear my cache after watching videos in Safari due to hiccups and delays when watching other videos. I knew this was an issue in Safari but I didn't know what was causing it.
  15. Kaupa macrumors regular

    Apr 16, 2008
    Nice to hear its fixed and 5 hours are possible. thats half an hour more than i get with my early 08 2,5 model.
    Btw the 7200 hdd should have an influence below a few minutes in terms of battery life because its an addition of maybe 0,1-0,5W on a total of 12-25W (browsing the inernet) powerconsumption! And even that depends on which hdds are compared. New WD or Seagate 320 7200 drives use less power than older 5400 drives!!
  16. CPD_1 macrumors 6502

    Nov 17, 2007
    South East Texas
    I don't often view flash videos, but it's nice to know that that would be the case.

    As is I get a little over 5 hours of battery life. I'll keep all of this in mind further on down the road. Thanks guys.
  17. Catch Them macrumors regular

    Jul 29, 2008
  18. THX1139 macrumors 68000


    Mar 4, 2006
  19. fuzznoggin macrumors newbie

    Nov 23, 2008
    I'm new to the forums and a potential MBP owner (within the next few weeks). I read about battery life issues with the MBP and to tell the truth, it;s been more that I've ever gotten with a PC laptop. I'm lucky if I've ever pulled 2 hours out of any battery in a PC Laptop. I'm reading 3 hours + in some of these posts. Sounds better than what I've put up with in the PC market.
  20. jjahshik32 macrumors 603

    Sep 4, 2006
    I duno about you guys but my 2.53ghz mbp is giving me around 5:05 of battery time on the 9400m gt with brightness on 1 notch.
  21. MBPDiva macrumors regular

    Nov 1, 2008
    on Orion's Belt
    The new generation Macbooks with the glass trackpad.
  22. Tex-Twil macrumors 68020


    May 28, 2008
    Thanks for the Firefox config. I think it helped my MBP to have more battery life. But I think I'm still far from the 5h on 9400. I'd say around 3.30 of pure browsing. 99% baterry life + calibrated
  23. alphaod macrumors Core


    Feb 9, 2008
    Battery life is so far good for me. I also bought a second battery with the computer, so I can last a day unplugged.
  24. darngooddesign macrumors G3

    Jul 4, 2007
    Atlanta, GA
    I'm unsure on how to implement this, could you be more specific in how you did it.


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