Poor battery performance in new Core ix MBPs

Discussion in 'MacBook Pro' started by Maximus434, Apr 19, 2010.

  1. Maximus434 macrumors regular

    Joined:
    Jan 11, 2006
    #1
    Anyone else finding their new Core i5/i7 MBPs much poorer in terms of battery life than the previous generation?

    I have the base model 2.4Ghz Core i5 15". I just took the power cable out (full battery), have 4 safari windows open, wifi on and screen brightness at 4 below maximum.

    The battery meter is showing just under 5 hours life. This is way off the mark with what Apple states AND the previous gen. I know apple numbers are usually slightly ahead of real world figures, but I have a previous gen 15" and remember easily getting more life out of the battery than this.

    I am going to try calibrating but surely I'm not alone here?
     
  2. MBHockey macrumors 68040

    MBHockey

    Joined:
    Oct 4, 2003
    Location:
    New York
    #2
    Haven't received mine yet but this worries me
     
  3. whatusername macrumors newbie

    Joined:
    Feb 10, 2010
    #3
    I was just about to start a post addressing the same issue. I have not tested how long the battery *actually* does last , but the read out at full charge hovers around 5 to 5:40 once the power is disconnected. Anybody else tested theirs?

    I have the MBP 15 i7 high res, with a 7200
     
  4. MBHockey macrumors 68040

    MBHockey

    Joined:
    Oct 4, 2003
    Location:
    New York
    #4
    FWIW, when i was at the Apple store and yanked the cord out of a 15" core i7 2.66 antiglare machine the battery indicator read about 5:40 (this was just with safari open and at half brightness.)
     
  5. Pressure macrumors 68040

    Pressure

    Joined:
    May 30, 2006
    Location:
    Denmark
    #5
    Let me guess, the websites you are visiting are swarmed by stupid Flash ads and other flashy manure?
     
  6. Jrbabb10 macrumors newbie

    Joined:
    Apr 16, 2010
    #6
    Hmm..

    Coming from a PC, Im new to this whole 'Battery Life' thing, so when I got mine this morning, I was curious to see how long it lasted. I have the i7 7200HDD HR Glossy 4GB Ram.

    I got the computer at 930EST, Booted up within minutes of having it.

    Its currently 220, and I have 12% 30 minutes remaining.

    During this I did have it on the AC for about 10 minutes, while it updated.

    I used PLEX for about an hour, Safari the whole time, Itunes for 30 minutes.

    So 5 hours with constant usage, including PLEX (Which really put a hurt on the battery) isnt so bad.
     
  7. Maximus434 thread starter macrumors regular

    Joined:
    Jan 11, 2006
    #7
    Don't take me for a fool.

    Browsing the exact same websites on my previous gen 15" yielded higher battery life. Have a look at the apple discussion forums. Lots of people having issue with battery life on these new machines. 5 hours seems to be the norm for most. Something is not right.

    EDIT: I'm showing 5:16 left on the battery now - at 79%. Maybe the battery reporter is off on these new machines. I have noticed it updates the time remaining more often than the last gen...
     
  8. MBHockey macrumors 68040

    MBHockey

    Joined:
    Oct 4, 2003
    Location:
    New York
    #8
    Nope. The site I had open was nytimes.com
     
  9. SwitcherWynne macrumors newbie

    Joined:
    Jan 19, 2010
    #9
    Just unplugged my new 15" to check, and I have 6:20 battery life left.
     
  10. Thiol macrumors 6502a

    Thiol

    Joined:
    Jan 26, 2008
    #10
    Did you calibrate once or twice just to be sure the numbers are accurate...
     
  11. kernkraft macrumors 68020

    kernkraft

    Joined:
    Jun 25, 2009
    #11
    My 15" first-gen unibody 2.53GHz MBP lasts 85 minutes. My 13" mid-2009 MBP lasts less than 3 hours on a '7 hours' battery. The 6.5 hours is actually pretty good. Enjoy, it's not worth worrying about. Install a few applications, extend the RAM and you'll never even achieve the current 6.5 hours any more. Still, I wish I've had half that.
     
  12. Maximus434 thread starter macrumors regular

    Joined:
    Jan 11, 2006
    #12
    Still only getting 5 hours after a calibration. Not good.
     
  13. harmonica01 macrumors 6502

    Joined:
    Jul 30, 2007
    #13
    http://forums.macrumors.com/showthread.php?t=900522

    Something is up.

    I took some pix in my thread of battery immediately after pulling cord with safari, mail, pages and other things open and it read 12 hrs

    Changed a few things like scrolling opening new windows, opened dashboard then closed it, etc. Stil was showing near 8 hours

    Will be testing today at work with just wifi + mail + pages on 13 hour shift so will see what it can do. I manage my screen well and put it to sleep if not the entire computer when not writing for a few minutes, I'm sure apple would consider this normal usage
     
  14. sapporobaby macrumors 68000

    sapporobaby

    Joined:
    Sep 27, 2007
    Location:
    3 earth minutes from your location....
    #14
    Did you calibrate the battery first as Apple recommends?

    http://support.apple.com/kb/HT1490
     
  15. Gorilla Power macrumors 6502

    Gorilla Power

    Joined:
    Mar 19, 2010
    #15
    That's the post I was looking for. Surprised that no one said this before.

    @OP : try it, maybe it will solve your problem.
     
  16. harmonica01 macrumors 6502

    Joined:
    Jul 30, 2007
    #16
    http://www.apple.com/batteries/notebooks.html

    Says to charge fully first time out the box, if you didn't do this, then yes you'll need to do a full calibration. Wear it down to 1% shut down cpu and leave it off for 4 or so hours while charging back up.
     
  17. markp9114 macrumors member

    Joined:
    Jul 8, 2009
    Location:
    IL
    #17
    so from my understanding, you just have to charge the battery fully and then run it down? On the apple link it says "when the battery gets very low, the computer will automatically go to sleep." Then in the tips it says: "When the battery reaches "empty", the computer is forced into sleep mode. The battery actually keeps back a reserve beyond "empty", to maintain the computer in sleep for a period of time. Once the battery is truly exhausted, the computer is forced to shut down. "

    so I dont understand what we are supposed to do. a) run the battery until the computer goes to sleep or b) change settings so computer doesnt sleep when battery is low and run it until it shuts off by itself. Which one?
     
  18. snaky69 macrumors 603

    Joined:
    Mar 14, 2008
    #18
    It's pretty easy.

    Run your computer until it dies(goes to sleep because it simply doesn't have any more power to be used), let it sleep for a goof 4 hours, more if you can, then charge it back up to 100%.

    The part about shutting off is that, if you left it sleeping because it is out of battery for too long, even the reserve charge has been used up and it would simply shut down.

    That's all it is.
     
  19. harmonica01 macrumors 6502

    Joined:
    Jul 30, 2007
    #19
    You'll get the pop up message around 8%.

    At that point turn brightness to full and quit all applications so the save doesnt have more than finder in it. Around 1-3% as low as you feel comfortable getting it to, do a shut down through your menu at top and that will alleviate it doing any ram backup onto the HD.

    From that point, keep it turned off and let it charge for ~4 hours more if you can just to be on safe side but I've never seen it not fully charged after 4 hours on my 13". Havent calibrated the new 15" yet.

    Start up like regular and see what results you get.

    I've gotten better results from shutting down at low percentage vs letting it go to sleep because it doesnt deplete as much if you have applications open and the forced sleep. If you let it go to forced sleep, I suppose you can let it sit around for a few hours til totally depleted, then hook it in.
     
  20. snaky69 macrumors 603

    Joined:
    Mar 14, 2008
    #20
    The sleeping method is the correct way to calibrate a battery, as per Apple's instructions, what you are doing does not calibrate the battery at all.
     
  21. tombilske macrumors member

    tombilske

    Joined:
    Jan 31, 2010
    Location:
    Australia
    #21
    the whole point of calibrating a battery is wearing it down until it is completely empty. once it gets to about 1% is will be forced to go to sleep. at that point, you leave it for at least 5 hours, UNPLUGGED, so that the battery will drain itself and become completely empty. then you plug it it back in again and charge it up (you can use it while its charging)
    that is a calibration, it has to be completely empty, thats the whole point
     
  22. Maximus434 thread starter macrumors regular

    Joined:
    Jan 11, 2006
    #22
    Yes I calibrated it correctly, as apple recommends.

    Still only 5 hours. These MBPs are worse for battery life than the last gen.
     
  23. tombilske macrumors member

    tombilske

    Joined:
    Jan 31, 2010
    Location:
    Australia
    #23
    try using it as they recommend (lightly on battery) for a week or two and see if battery life improves. apparently the last model improved in battery life in the first few weeks...not sure if thats true but i read it somewhere on this forum
     

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