Battery underwhelming.

Discussion in 'MacBook Pro' started by Lucas Godfrey, Nov 16, 2012.

  1. Lucas Godfrey macrumors 6502

    Lucas Godfrey

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    #1
    I just picked up a "new" late 2011 17 macbook pro.
    (brand new in box at least)
    and i noticed that the max battery mah is only 8950, on my 2009 mbp 17 it was something like 12000/13000,
    Now i have a spare 2009 battery in storage, I bought it just in case and is still on about 3 cycles. Can I put that battery into my new macbook to leverage longer battery life?
    has anyone done the same?
     
  2. newdeal macrumors 68020

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    Oct 21, 2009
    #2
    ...

    No, if the battery is smaller its still filling the whole space inside the case and they made it smaller because the system draws less power.
     
  3. Inside_line macrumors regular

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  4. T5BRICK macrumors 604

    T5BRICK

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    #4
    LiIon batteries lose capacity over time. It's possible that the "new" MBP has simply sat on the shelf long enough that the battery has lost some capacity. The same could be said for your 2009 battery that you've been holding on to.

    If you'd like to make sure the battery lasts as long as possible, you ought to read through this.

    http://www.apple.com/batteries/notebooks.html
     
  5. Lucas Godfrey, Nov 18, 2012
    Last edited: Nov 18, 2012

    Lucas Godfrey thread starter macrumors 6502

    Lucas Godfrey

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    #5

    It only had 1 cycle when I opened it, could it really have lost nearly 4000mAh by being on a shelf? Can anyone else chime in with the max mAh of their i7 17 batteries?
    i downloaded coconut battery and it listed the Max for this notebook as 8450 (which i have somehow exceeded? see attached)


    Edit: i have also noticed that coconut battery is reporting my mac as being 22 months old, it is about 12 months old at the moment so there is some weirdness there. (from manufacture i mean, its 3 days old from purchase; its an apple refurb)
     

    Attached Files:

  6. T5BRICK macrumors 604

    T5BRICK

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    #6
    Something is wrong with that battery. It should 12000-13000 mAh for the design capacity.

    I'd contact Apple if you just bought this computer.
     
  7. Illuminated macrumors 6502a

    Illuminated

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    #7
    I'm using Coconut Battery now as well and it's showing me 5770 mah design capacity....

    Bad battery?
     
  8. T5BRICK macrumors 604

    T5BRICK

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    #8
    Battery capacities vary depending on model.
     
  9. Illuminated macrumors 6502a

    Illuminated

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    #9
    I have a 2012 Macbook Pro 750gb harddrive, 8gb of ram, i7...
     
  10. T5BRICK macrumors 604

    T5BRICK

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    #10
    13" MBP - about 5600 mAh
    15" MBP - about 7000 mAh
     
  11. Illuminated macrumors 6502a

    Illuminated

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    #11
    Then why are people saying 13,000 mAh?
     
  12. T5BRICK macrumors 604

    T5BRICK

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    #12
    Because the OP said they have a 17" MBP.
     
  13. Illuminated macrumors 6502a

    Illuminated

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    #13
    I completely read that wrong. Thought he said I7 not 17"...my bad!
     

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