Late 2008 (Unibody) Macbook Pro Battery life 2 hours 30 minutes?

Discussion in 'MacBook Pro' started by tony4d, Dec 16, 2008.

  1. tony4d macrumors member

    Jul 10, 2008
    Is this normal? Or, based on your experiences should I take this to an apple store?


    I feel like 2 hours and 30 minutes with the more powerful gpu is good, but I feel like it should be more like 3 hours and 30 minutes considering Apple says 5 hours with better battery life settings.

    FYI, I have bluetooth off, airport on, and screen brightness almost all the way up.
  2. Hydroxs macrumors regular

    Jun 25, 2008
    You should turn your brightness down to get more battery life.
  3. blurb23 macrumors 6502a

    Feb 25, 2007
  4. tony4d thread starter macrumors member

    Jul 10, 2008
    lol, that's why I posted the nice image. 9600.
  5. J the Ninja macrumors 68000

    Jul 14, 2008
    The battery counter takes into effect what you are doing at the moment, so the time can often jump wildly when the battery has higher charges. It's pretty accurate when you are down to 6% or something, but a 97% it's practically just pulling times out of its ***.
  6. tony4d thread starter macrumors member

    Jul 10, 2008
    Seriously though. You really think brightness level takes me to 2 and a half hours?
  7. MattZani macrumors 68030


    Apr 20, 2008
    With my Brightness all the way up, Airport on, BT off, at 100% Im Getting around 4 hours with my Early 08 MBP, which cant switch to the 9400, despite having 167 cycles on it, and 93% Health.

    I Would keep check on it, and if its accurate, take it to an apple store.
  8. tcphoto macrumors 6502a


    Feb 23, 2005
    Madison, GA
    Yes, the brightness setting will drain the battery very quickly. After installing the 10.5.6 update and recent MBP updates, it looks like I am getting over five hours with 9400 card, no back lit keyboard, bluetooth and about 2/3 on display brightness. BTW, I am on the late 2008 MBP 2.4.
  9. tony4d thread starter macrumors member

    Jul 10, 2008
    Interesting, I didn't think about that too much. I was just checking it at my desk with an external monitor hooked up. Eliminating that it does show 3 hours 10 minutes. That's more like it, but I can't help but feel its still disappointing.

    I dunno, as suggested by another poster. I think I'll actually try it and time it to see what I get. If I'm only getting like 3 hours I think its at least worth a trip to the apple store to get someone's opinion there.
  10. Cave Man macrumors 604

    Cave Man

    Feb 12, 2007
    Neander Valley, Germany; just outside Duesseldorf
    Try surfing with Safari and compiling Handbrake. That drained my MBP battery in 1 hour.
  11. nippyjun macrumors 65816

    Jul 26, 2007
    Are there any programs that throttle the cpu's down when they are not needed. Something along the lines of amd's quiet and cool.
  12. jjcore macrumors newbie

    Dec 16, 2008
    I'd suggest using CoolBook to undervolt your CPU. It'll run a bit cooler and save you some battery life. I have my 2006 MBP with a 2.33 GHz C2D running at 1.8 GHz only, when on battery power.
  13. alphaod macrumors Core


    Feb 9, 2008
    Intel SpeedStep?
  14. Tilard macrumors newbie

    Mar 17, 2008
    same issue here

    I have already returned one Macbook Pro 2.4 to the Apple Store and having the exact same problem now again on my new Macbook Pro.

    WLAN off, Bluetooth off, Display brightness all the way down I get only about 2-2,5 hours of battery life.

    Over night in sleep mode the battery also looses lots of power, around 20-30%.

    Also charging the battery takes ages.

    I guess I have to return this machine as well...
  15. six.four macrumors 6502

    Oct 24, 2008
    early 08 MBP penryn's actually get significantly (10-15% if I recall correctly) better battery life than the new unibody MBPs
  16. danoan522 macrumors newbie

    Jan 10, 2009
    Saint Lucia
    on the other hand

    well seems to me that apple's specs were pretty accurate after all. I'm running the unibody mbp 2.4 and my battery life meter gives me readings between 4:48hr and 5:57hr while connected via airport and with screen brightness halfway up/down. The average battery life i get while browsing the web, and doing other non-intense work would be definitely 5 hours, if not a lil more. O i should mention that i'm using a 7200rpm harddrive? that's supposed to cut down battery life by an hour. Just thought i should share this...
  17. Crown macrumors newbie

    Mar 24, 2008
    I was experiencing about the same results with my late 08 mbp.

    Try selecting the "better battery performance" for the graphics. This significantly improved the battery performance when I did this.
  18. spinnerlys Guest


    Sep 7, 2008
    forlod bygningen
    Because those models have a battery with 60 Wh, compared to the 50 Wh of the new Unibody MBP.
    Even the white MacBook had a 55 Wh battery.
  19. DAMNiatx macrumors 6502a


    Jan 20, 2009
    how many application you open to get 5 hours ?, i only get 3 hours now when only using it for browsing. :(
    any suggestion ?
  20. lscangus macrumors 6502

    Jul 29, 2003
    Newcastle, UK
    I got approx that amount of battery life in performance mode. But it isn't that accurate. U can expect about 3 hours of normal use.
  21. PeterQC macrumors 6502a


    Jun 30, 2008
    Do you play youtube videos? Flash is a real power eater.
  22. S-Man macrumors regular


    Feb 1, 2009
    I am disappointed at the amount of battery life in my UMBP also. I was expecting at least 5 hours, not a maximum of 5 hours if you're lucky.
  23. McGiord macrumors 601


    Oct 5, 2003
    Dark Castle
    Well more than a year passed. And yes I am bringing this thread back.
    The main reason been that I hope to get some updates from other late 2008 MBP users, if you still are out there.

    What is the expected time you should get with the battery for these models?
    Apple specs vs real results.

    I have a 2.8Ghz 15". And I get 2.5 hours for web browsing, email and mainly mac rumors, this is with the better battery life setting.

    With the high performance no way I get to 1 hour.

    I had calibrated the batteries, I have 2, and with both the same thing.

    Those of you who asked apple for a replacement, what you got? I mean in terms of battery performance.

    After all these months what is the performance you get? Are you keeping your late 2008 macs or have you replaced them with recent ones?

    Thanks for your replies.

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