Beginner's Macbook Battery Question

Discussion in 'MacBook Pro' started by aha45, Dec 27, 2007.

  1. macrumors newbie

    Joined:
    Dec 27, 2007
    #1
    Today I received a macbook, my first mac as well as laptop. I'm very concerned with preserving the battery, and I am told letting the battery run to 0 percent and charging to 100 percent is the most effective way of conserving it. I let my macbook run to 0 percent (I was fooling around with iPhoto) and the laptop turned off, but there was a pulsing white light. I thought a pulsing white light meant sleep mode, but I let the macbook run until it turned off. Did it shut down entirely, and is the 0 to 100 percent charge efficient?

    thanks, im sure its an obvious answer
     
  2. macrumors 65816

    skyrider007

    Joined:
    Aug 5, 2007
    Location:
    Bangkok
    #2
    Let it sleep (unplugged) for at least five hours. That should drain all the juice left in the battery.
     
  3. thread starter macrumors newbie

    Joined:
    Dec 27, 2007
    #3
    but in the future, if i want to run the battery all the way down, its fine if it just shuts off and pulses white?
     
  4. macrumors 65816

    skyrider007

    Joined:
    Aug 5, 2007
    Location:
    Bangkok
    #4
    If you want to make sure that your battery is completely drained, there should be no pulsating light. So leave it in sleep mode unplugged until the light goes out.
     
  5. macrumors G5

    Consultant

    Joined:
    Jun 27, 2007
    #5
    Use it on battery at least once in awhile (weekly).

    If using battery, should deplete battery fully, and recharge fully.

    Do not use it for 5 minutes and charge it! If you start using it, try to keep it on battery to drain it fully. Letting it go to sleep due to low battery is fine.

    Exceptions are ok once in awhile. =)
     
  6. macrumors 68020

    Joined:
    Feb 12, 2005
    Location:
    VA
    #6
    This is bad advice. It is perfectly fine to use your machine for only 5 minutes, and then plug it in.

    This has been discussed a million times already. Everything you need to know can be found on this page.
     
  7. macrumors 68020

    Joined:
    Dec 6, 2007
    #7
    I agree. If you relentlessly drain your battery until it dies each time you unplug, you'll wear it out far more quickly, as you'll go through a cycle each time.
     
  8. macrumors 604

    CalBoy

    Joined:
    May 21, 2007
    #8
    This isn't necessary. As long as the battery is calibrated periodically, one doesn't need to drain it constantly.
    This is quite false. Thanks to the nature of Lithium batteries, cycles are not counted based on the number of charge-recharge cycles; a cycle is represented by the total amount of power the battery holds being depleted and then recharged. Thus, using 10% of the battery ten times will equal one cycle, as will using 100% of the battery one time.

    This isn't a concern, because the battery will not charge if it is above 95% anyways.
    Again, not necessary.


    OP, I suggest you check out the guide on this. I think you'll find it helpful. :)
     
  9. macrumors G5

    Consultant

    Joined:
    Jun 27, 2007
    #9
    Then why does a 3 year old iBook (back when I still had it) still get 5 hours on battery?

    I've gone through many Mac laptops since G3 and all of them have stellar battery life. It's what works for me.
     
  10. macrumors 68020

    Joined:
    Dec 6, 2007
    #10
    The G3/4 iBooks had perhaps the best battery lives of anything Apple's ever made. I never calibrated my G3 battery (which had 69 cycles when I got it), but I regularly exceed 5 hours of life on it (according to the time ratings) for the duration in which I kept it. I doubt many with a Macbook/Pro will still be getting 4 hours (nevermind 5) of life after 100 cycles. The batteries just aren't made to last.
     
  11. macrumors 604

    CalBoy

    Joined:
    May 21, 2007
    #11
    That's a very loaded question and is frankly logically horrible. The advice you prescribed is accurate for those older batteries used in cordless home phones (not mobile phones). The batteries in notebooks (not just macbooks/macbook pros) are made from an entirely different material and are quite different.

    http://www.apple.com/batteries/notebooks.html
     
  12. macrumors newbie

    Joined:
    Feb 26, 2008
    #12
    its pretty much 100% drained when it forces itself into sleep like that. it will not make a difference weather u plug it in when it goes to sleep or wait till it is shutdown
     
  13. macrumors 68000

    lamina

    Joined:
    Mar 9, 2006
    Location:
    From Canada, living in Seoul
    #13
    I leave mine plugged in whenever possible.

    But, daily, I use my computer for about 2 hours on battery power. I bring it home and plug it in again.

    My battery has 157 cycles and is at 100% health. I bought this in April 2008.
     
  14. macrumors member

    Joined:
    Oct 15, 2008
    #14
    As someone who is very, very OCD (trying to stop:cool:) about condition of electronics/games/movies/whatever, I say this to you. Just use it, and enjoy it. If you end up buying a new battery 2 or 3 years down the line, just do it.

    I just got a new Mac last week. Everything looks pretty good on it, but I am not looking for any scuffs, gaps, uneven backlighting, yellow tint, etc. I just want to enjoy it. Everyone else does, and they seem just fine. :D
     
  15. macrumors 68000

    drewsof07

    Joined:
    Oct 30, 2006
    Location:
    Ohio
    #15
    +1 Quality post, I try to live by this as much as possible unless I have serious issues. There are just so many other things to stress out about today, I figure my mac shouldn't be one of them since it's my place of relaxation and escape from the world :)
     

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