Late 2008 UMBP only gets 3 hours of battery life with the 9400?

Discussion in 'MacBook Pro' started by Whackintosh, Aug 4, 2009.

  1. Whackintosh macrumors 6502


    Mar 8, 2009
    Montreal, Quebec
    I scored a refurb 2:53 MBP early last month and while I love it, the battery only gets me about 3 hours on a full charge, and that's non-cpu-taxing usage (IE web browsing via ethernet, Word etc, no wi-fi, no bluetooth). This is on the 9400, not the 9600, with screen at roughly 50% brightness. Does that sound right to you guys? I thought it would get me at least as much time as my 2006 coreduo Whitebook gets?
  2. cluthz macrumors 68040


    Jun 15, 2004
    Sounds low.

    Download coconut battery to check it your battery holds as much as it should
  3. Trivial rock macrumors regular

    Trivial rock

    Oct 9, 2008
    Agreed, this sounds low. I have had my uMBP since Oct, ~ 2 months ago a friend and I did a battery test (he had a new White MacBook with 9400M). We both got 5 hours with semi dim screens and no wifi or blutooth. I average 4 hours with wifi and screen 4 bars from brightest. Thats with the 9400m just web browsing.
  4. sukanas macrumors 6502a


    Nov 15, 2007
    i seriously dont understand how everyone on this forum gets 5+ hours...

    i even went to the apple store and the unreplaceable battery barely gets 5 hours. i think somehow these late 08 owners want to feel proud of an imaginary battery life. realistically, it lasts around 3 hours. the only way i can see someone getting 5 hours is if they LIGHTLY surf the web and i mean lightly ie. load a page, and keep it on there for 5 minutes, and just pause and let the screen dim, and then let the battery time spike up and post on macrumors that you get 5 hours but once you start sufing more intensely, the battery life estimated time goes down to 3 hours but you never mention that
  5. DAMNiatx macrumors 6502a


    Jan 20, 2009
  6. uberamd macrumors 68030


    May 26, 2009
    Goodness, I get 5+ hours on my early 2008 (pre unibody) Macbook Pro.
  7. GeJohnO macrumors newbie

    Jun 29, 2009
    After I calibrated my battery, I get 4+ realistic hours of battery life with brightness at 1/3. When you turn airport/bt off, it shoots over 5.
  8. sriggles macrumors newbie

    Feb 26, 2008
    Seriously...couldn't agree more.
  9. geoffreak macrumors 68020


    Feb 8, 2008
    I get 3-4 realistic hours of usage (wifi, firefox, email) on my early 2008. If the OP is really only doing what was specified, the battery might be on the way out. My battery is around 85% health, so users of the same MBP could get better battery.

    OP, install Coconut Battery and post a screenshot of the application while running.
  10. TheBritishBloke macrumors 68030


    Jul 21, 2009
    United Kingdom
    The late 2008 model only had an >5 Hour battery life right? And apple's figures are generally not close. However with my mid-2009 MBP, I've still squeezed 7:30hrs out of this on one charge, I guess it can vary as they're all different.

    As mentioned before, try coconut battery to ensure your battery hasn't lost it's ability to hold as much charge.
  11. PodHead macrumors member


    Oct 18, 2006
    Boise, ID
    I'm in the "can't get more than 4 hrs" club myself. This was when it was brand new as well. Two years later and it still hovers around 3:57 and that's with the normal parameters (surfing, screen at half bright, with minimum apps running).
  12. Tanj macrumors newbie

    Jan 27, 2009
    My Late 2008 MBP is only 16 months old.

    85 load cycles.

    Original Capacity of 4600, current is only 4341. That's 94%.

    With the screen as dim as it can go, wifi on, adium, mail, and safari on doing web browsing with a few windows open. I get around 2 hours and 15 minutes of life and that doesn't seem right at all...

    Can this be confirmed or explained?
  13. cderalow macrumors 6502



    have you tried to recalibrate the battery per apple's guidelines?

    I know I was in a similar boat not long ago, and two full calibration cycles has me up in the 4 hour usage range.
  14. Gen macrumors 6502a


    Jul 15, 2008
    I can get a 2 hour movie and 3 hours of browsing out of my late 2008 - screen brightness about 70%.

    So, yeah. Something is up with your battery.
  15. iLog.Genius macrumors 601


    Feb 24, 2009
    Toronto, Ontario
    +2. If you do an average, 3 hours, maybe 3 hours and a bit is what you will really get with the odd usage noted by sukanas.
  16. espressoroast macrumors member


    Feb 3, 2008
    Sorry, just to clarify, does IE mean Internet Explorer, as in BootCamp Windows or I.e. as in Latin?

    My Santa-Rosa 15" is has 150 cycles on the clock, shows 75% health and I only hope to get anything close to three hours if I turn Wi-Fi off and turn brightness all the way down.
    In a typical case, a bit more than two hours.
    AND, I am waiting for the bloody Arrandales...:mad:
  17. srexy macrumors 6502a

    Nov 19, 2006
    I scored a 2.53ghz refurb last year in June and I'm getting about the same as this guy. I'm pretty sure that my battery is going to need replacing soon as I'm at 87% on 180 cycles - just got to wait til it drops down below 80%/<300cycles which is the Apple guideline for them to replace.

    Just out of interest are you guys running leopard or snow leopard?
  18. Tanj macrumors newbie

    Jan 27, 2009
  19. srexy macrumors 6502a

    Nov 19, 2006
    Just did a calibration yesterday and I'm down to 84%/182 cycles. Genius bar here we come...

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