I let my MacBook Pro die a lot.

Discussion in 'MacBook Pro' started by KnowNol, Jan 3, 2010.

  1. KnowNol macrumors member

    Joined:
    Dec 11, 2009
    #1
    Sometimes I'll be on my Mac while watching TV and the battery will die. I'm realizing its happening more often as my charger is sometimes in the other room. Am I damaging my battery?
    :(
     
  2. spinnerlys Guest

    spinnerlys

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    #2
    Yes, as you put more cycles on your battery, and depending on what MBP you have (most likely one of the newer Unibodies I presume, the one with the integrated battery) it can last up to 1000 cycles.

    www.apple.com/batteries and MRoogle will give you so many information on battery health, cycles and all the angst that goes with it, that you will be sorry to have ever asked that question. ;)

    So if you don't plan to use your battery in critical situations (far away from any outlet) where you really need it, don't worry.
    Or do.
     
  3. Dan73 macrumors 6502a

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    Jul 30, 2009
    #3
    Not really. But its a battery it gets worn down.
     
  4. maflynn Moderator

    maflynn

    Staff Member

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    Boston
    #4
    Yes,
    At some point soon, you'll start noticing that your battery life will be shorter and shorter. The achilles heel for the batteries is deep drains, so the your over all battery health is probably not as good as it could be.
     
  5. JAT macrumors 603

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    Dec 31, 2001
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    Mpls, MN
    #5
    Uh, isn't that only actual deep drains? (which applies to any lithium battery) A laptop shuts off before that happens. And frankly, running the battery down to shut off is part of Apple's battery rejuvenation process to stop the battery life from diminishing.

    But if you sit in one place frequently, it might just be best to have it plugged in.
     
  6. maflynn Moderator

    maflynn

    Staff Member

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    #6
    There's no action that can rejuvenate the battery, the calibration process basically tells the computer when the battery is about to die, so it can accurately report how much juice is left.[/QUOTE]

    Deep drains are bad for any battery and it does shorten its lifespan.
     
  7. miles01110 macrumors Core

    miles01110

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    The Ivory Tower (I'm not coming down)
    #7
    Batteries degrade over time. Use your machine and buy another one/have the original replaced if it bothers you.
     
  8. Dozerrox macrumors 6502

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    Dec 23, 2009
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    Exeter
    #8
    Yeah, I think this for sure. People seem to worry so much about their batteries.
     
  9. Bill Gates macrumors 68020

    Bill Gates

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    Jun 21, 2006
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    127.0.0.1
    #9
    It's best to avoid discharging the battery completely on a regular basis, but all that you are doing is shortening its life. You aren't "damaging" it, so don't worry about it.
     
  10. reebzor macrumors 6502a

    reebzor

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    Jul 18, 2008
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    Philadelphia, PA
    #10
    Isn't it justifiable? Apple promised me a 7hour battery for 5 years, shouldn't I be concerned if it doesn't last that long?
     
  11. maflynn Moderator

    maflynn

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    #11
    I take what apple promises with regard to battery life with a grain a salt - actually with a pound of salt. Apple has a very good history of overstating battery longevity in all of their products.
     
  12. -aggie- macrumors P6

    -aggie-

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    #12
    That's suggested as a monthly thing to do and all it does is calibrate the battery. It's bad to let the battery discharge to shutoff frequently and it's bad to keep the MBP constantly plugged in and charging.
     
  13. GoCubsGo macrumors Nehalem

    GoCubsGo

    Joined:
    Feb 19, 2005
    #13
    Apple did not promise you, Apple stated that the battery lasts a certain amount of time and it is likely that they're citing that number based on certain factors. Find those factors out, see if you get that out of your battery (or within a 20% tolerance) and then talk. If you do not then I would hope for a new battery.
     
  14. Clete2 macrumors 65816

    Clete2

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    Sep 20, 2008
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    USA
    #14
    False. The battery sits in an idle position once it is charged. If you're referring to the fact that the notebook uses 90W of power but the charger is only 85W, this will only happen under full load.
     
  15. Dan73 macrumors 6502a

    Joined:
    Jul 30, 2009
    #15
    Uh no, not using a battery for an extended period of time will kill it too.

    Just read around here about people who use their MBPs like desktops then after a few months unplug it only to have their laptop die at 70% battery.

    Running down your battery to 5-10% is healthy, letting it discharge and leaving it isn't good, neither is plugging it in and forgetting about it
     
  16. Clete2 macrumors 65816

    Clete2

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    #16

    I didn't state that leaving it plugged in for months on end is bad for it.

    I understand what aggie said to mean that if you keep your MBP plugged in for a few days, it will degrade the battery. This is false.

    There is a happy medium. Do a cycle once a month or so and you will be fine.

    E.g. If you use your MBP at a desk all the time (well, you should've bought an iMac ;)), then you should use it unplugged once a month. Leaving it plugged up for 25 days straight won't damage the battery.
     
  17. Claerion macrumors member

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    Nov 3, 2009
    #17
    Spinnerlys your sig gave me a bit of a chuckle. Thank's
     
  18. -aggie- macrumors P6

    -aggie-

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    #18
    I believe I said "constantly" not "for a few days," so you keep doing what Apple does not suggest and we'll see whose battery lasts longer.
     
  19. kidwithdimples macrumors 6502a

    Joined:
    Jun 17, 2007
    #19
    So what happens if you reach 1000 cycles with the new uMBP integrated batteries? Do you take the laptop to Apple to get a new one? or does it mean you're basically ****ed and you'll need to use the charger every time you use the laptop?
     
  20. TuffLuffJimmy macrumors G3

    TuffLuffJimmy

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    Apr 6, 2007
    Location:
    Portland, OR
    #20
    Take it to Apple or buy a battery and install it yourself.
     
  21. Matthew Yohe macrumors 68020

    Joined:
    Oct 12, 2006
    #21
    You can charge the battery up to 1000 times before it reaches 80% of its original capacity. This means that you will still have many more charges left, but you won't be able to last as long as when you first got the machine.
     
  22. OptyCT macrumors 6502

    Joined:
    Nov 9, 2008
    #22
    One cycle is equal to a 100% charge. Therefore, if you run the battery down to 50%, then recharge it, it would take 2 recharges from 50% to equal one cycle. You cannot use "charge" and "cycle" in the same context when talking about lithium-ion batteries. You can when talking about ni-cad batteries.
     
  23. pellets007 macrumors 6502a

    pellets007

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    Jan 28, 2009
    Location:
    New York
    #23
    Not using your battery will kill it.
    Using your battery will kill it.
    Whichever is the easiest for you.
     

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