2011 Macbook Pro SSD + Optibay = low battery life?

Discussion in 'MacBook Pro' started by djpuma, Dec 19, 2011.

  1. djpuma macrumors regular

    Joined:
    Jul 13, 2010
    #1
    Just as the title states. Does having an SSD and another hard drive in the super drive location equate to a much lower battery life.

    I'm getting roughly 3 to 4 hours on battery if I just sit there and barely browse the net.
    The graphics card is always stuck on discrete so I used gfxcardstatus and forced it to the other one (on board) and showed roughly 4.25 hours of battery life (when fully charged)

    My 2010 had the same thing but instead of an ssd it was a regular platter style hard drive (had another in super drive location)

    and I swore I got more battery life than this.

    laptop specs are in my sig.

    I just want to know if this is average
    and yes the battery is fine, I've reset smc, pram, conditioned battery and it has about 75 cycles on it.

    Thanks

    it seems like after about 30 or 40 minutes of battery usage it shows about 1.5 hours of battery left.

    I've never just timed it and ran it down for hours yet to be certain, this is just off of the time that OSX shows me.
     
  2. heisenberg123 macrumors 603

    heisenberg123

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    Hamilton, Ontario
    #2
    i guess it depends how often its reading and writing to the 2nd hard drive
     
  3. onions macrumors member

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    Aug 17, 2011
    #3
    do you have the same amount of ram? more ram = lower battery life. screen brightness, and any other programs you have running in the background (esp. vmware or parallels) are also contributing factors.
     
  4. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #4
    PRAM/NVRAM has nothing to do with battery/power/charging issues. Resetting it will not help. Only resetting the SMC addresses such issues. Also, if by "conditioned battery" you're referring to calibration, newer Mac unibody models with built-in batteries come pre-calibrated and do not require regular calibration.

    Read the BATTERY LIFE FROM A CHARGE section of the following link. This should answer most, if not all, of your battery questions:
     
  5. GuitarG20 macrumors 65816

    GuitarG20

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    Jun 3, 2011
    #5
    RAM doesn't make a significant difference in battery life. Remember, a RAM chip only uses ~1.5 volts.
     
  6. Frankie4Fingers macrumors newbie

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    Dec 18, 2011
    #6
    Not sure but if that 2nd drive in the optibay is always spinning won't this affect the battery?
     
  7. heisenberg123 macrumors 603

    heisenberg123

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    #7
    for sure it will
     
  8. djpuma thread starter macrumors regular

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    Jul 13, 2010
    #8
    i did forget to mention that since I've put the SSD in I've changed browser downloads, dropbox, etc to go to the 2nd hard drive

    i didn't want to trash up my ssd with downloads and dropbox crap (unless that is ok)

    That is the only thing different from my previous setup.

    Previously I could eject the 2nd drive if I wanted to, now it will never let me so I'm assuming the open programs are keeping it running.
     
  9. bill-p macrumors 65816

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    Jul 23, 2011
    #9
    I think part of the problem might be the SSD.

    Some SSDs suck more power than regular HDDs.
     
  10. heisenberg123 macrumors 603

    heisenberg123

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    #10
    ya if that 2nd hard drive is always running that will effect battery
     
  11. dusk007 macrumors 68040

    dusk007

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    Dec 5, 2009
    #11
    What does the voltage got to do with that. A CPU needs only 0.77V in idle and 1.2V under load it still consumes a lot of W.
    8 vs 4GB RAM usually mean 2 additional W under load and only very little idle.

    A second HDD or SSD is kind of the same.
    an HDD spun down 150 mW
    HDD idle 5-800mW some upto 1.3W like the Momentus XT.
    HDD under load 3+W.

    If it is just sitting there the decrease in battery life isn't very big. If it is spun down almost non existent.
     
  12. bdodds1985 macrumors 6502a

    bdodds1985

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    #12
    so in energy saver, when you select to put the hard disk(s) to sleep when possible... does it still work with a 2nd ssd? i too am interested b/c i just bought another 120gb ssd to take place of the optical bay in my 2011 2.2 MBP
     
  13. en0x macrumors member

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    Dec 22, 2008
    #13
    ssds don't support sleep mode(put the hard disk(s) to sleep when possible).... because there is no spinning
     
  14. bdodds1985 macrumors 6502a

    bdodds1985

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    #14
    of course, makes sense. so basically if my 2nd ssd only had music, pictures and video, it wouldnt do anything until i opened one of the following items? am i correct? thats very nice if so..
     
  15. Agent-P macrumors 68030

    Agent-P

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    The Tri-State Area
    #15
    Well my current setup is an ssd in the optibay and my stock hard drive exactly where it is. I'm not having any problems with battery life. Which brand of ssd are you using? It may need a firmware update or it may be a defective drive.
     
  16. djpuma thread starter macrumors regular

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  17. miker2209 macrumors regular

    miker2209

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    Jan 2, 2010
    #17
    2010 models have longer battery life than the 2011 models, I have my HDD in my OptiBay and doesn't take up too much power. I just make sure nothing on the HDD is being used when not needed i only use it for storage Movie, music etc. And even when i do use it, it only lose about 15 mins of battery time.
     
  18. danyo macrumors newbie

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    Dec 21, 2011
  19. tekkietekkie macrumors member

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    Aug 26, 2010
    #19
    Using an ocz agility 3 and a momentus xt 500gb in the optibay setup the same way as yours i was losing hours of battery life :( I changed it so only data is on the 500gb drive and then i dismount it because otherwise it never goes to sleep and never stops spinning.
     
  20. Tankmaze macrumors 68000

    Tankmaze

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    Mar 7, 2012
    #20
    Would like to know more about this, as i am thinking in putting 2nd drive on optibay.

    Any battery life decrease using this setup?
     
  21. GGJstudios macrumors Westmere

    GGJstudios

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    May 16, 2008
    #21
    Yes, it can decrease battery life, as a constantly spinning drive will draw more power than an optical drive which is unused most of the time.
     
  22. Tankmaze macrumors 68000

    Tankmaze

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    Mar 7, 2012
    #22
    Cheers for confirming this ggj, i've also read from other threads & forums that it will decrease battery life, but it could depend on the hdd & ssd. The recommended hdd seems to be samsung or hitachi for the low power consumption.
     
  23. GGJstudios macrumors Westmere

    GGJstudios

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    May 16, 2008
    #23
    As the drive will be in use much more than an optical drive would (for most users), it will consume more power whether it's a HDD or SSD. To the extent that you can, run on AC power and conserve your battery charge for those times when AC power isn't available.
     
  24. throAU macrumors 601

    throAU

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    Feb 13, 2012
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    Perth, Western Australia
    #24
    So basically instead of running off one drive now, your machine is constantly having to power 2 drives for you to get anything done.

    This is why your battery life is junk.


    You can perhaps mitigate this somewhat by storing all your "Active" data on the SSD and just using the hard drive for archival or infrequently accessed data. This will enable it to power down more often, saving you battery.
     
  25. GGJstudios macrumors Westmere

    GGJstudios

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    May 16, 2008
    #25
    In case you didn't notice, you're replying to a post that's almost a year old. The thread was resurrected by Tankmaze.
     

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