Leaving a charged battery plugged?

Discussion in 'MacBook' started by iAppleONE, Dec 1, 2008.

  1. iAppleONE macrumors member

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    Sep 14, 2008
    #1
    Would this damage the lifespan of the battery?
     
  2. Tallest Skil macrumors P6

    Tallest Skil

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    #2
    It is recommended that you discharge fully at least once per month. Other than that you may leave it plugged in 24/7 without any ill effects.

    What, do you think it will "overcharge"?
     
  3. waloshin macrumors 68040

    waloshin

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    Oct 9, 2008
    #3
    I think it does.
     
  4. Tallest Skil macrumors P6

    Tallest Skil

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    #4
    Again, nope.
     
  5. VSMacOne macrumors 601

    VSMacOne

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    #5
    As long as you calibrate once a month, and take it off AC every once in a while (without necessarily draining it) you should be fine plugging it in 24/7. This way, you keep the battery load cycles low, since the battery is only good for a certain number of cycles.
     
  6. silverblack macrumors 68020

    silverblack

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  7. Luke1robb macrumors 6502a

    Luke1robb

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    #7
    What happens if you have the computer turned off should you have it plugged in or does it matter?
     
  8. shady825 macrumors 68000

    shady825

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    #8
    This is terrible advice. Its obviously an opinion.
    My battery on my MacBook was just replaced due to a defective battery. I asked the apple genius about this exact same thing. his exact words were, "Anytime the battery is plugged into the wall, you are decreasing the life span"

    Its going to decrease over time no matter what but the more its plugged in the sooner it will happen.
     
  9. iMacmatician macrumors 601

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    Jul 20, 2008
    #9
    I would have to concur. When I got my iBook I was told to unplug whenever the indicator light turned green (fully charged).

    Other threads on this issue include similar opinions.
     
  10. VSMacOne macrumors 601

    VSMacOne

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    Oct 18, 2008
    #11
    Straight from Apple... :D

    http://www.apple.com/batteries/notebooks.html

    EDIT: thejadedmonkey - my bad, I didn't refresh before i posted.
     
  11. mattyb240 macrumors 6502a

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    #12
    My sister works at the store as a mac specialist and she and her friend (a genius) have both said, the Early 08 stuff isn't effected by leaving it on charge all the time, as once it reaches full, it powers straight off the mains, not through the battery. As long as you calibrate it once or twice a month!!
     
  12. Luke1robb macrumors 6502a

    Luke1robb

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    #13
    What about when its charged and sleeping.... plugged in or no?
     
  13. SnowLeopard2008 macrumors 604

    SnowLeopard2008

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    #14
    Let's settle this misunderstanding. That Apple employee is an idiot. My dad makes battery management chips (smart battery). He knows quite a bit about lithium ion batteries. I have to also concur this 'opinion' as he told me to fully drain the battery every few months (once a month won't drastically improve the battery lifespan, maybe like a 2-3 percent). Other than that, you can pretty much do whatever. Again, this is from an expert on lithium ion batteries. Call it an opinion if you will, but the fact stands.

    Seriously, that employee is indirectly saying, use the battery as much as possible... Which is very stupid as lithium ion batteries have a limited number of cycles (fully drain to fully empty).
     
  14. mattyb240 macrumors 6502a

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    #15
    Agreed!
     
  15. iAppleONE thread starter macrumors member

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    Sep 14, 2008
    #16
    Wow...thanks to all the responses!!:)
    So I should let my battery fully charge and then unplug it and keep repeating this process?
     
  16. mattyb240 macrumors 6502a

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    May 11, 2008
    #17
    Not all the time as you will be wearing it out quicker, use it on battery when you need too! Just make sure you discharge it an drain it completely every now and again!
     
  17. VSMacOne macrumors 601

    VSMacOne

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    #18
    +1
     
  18. shady825 macrumors 68000

    shady825

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    #19
    a new battery is like $100-$130, i love how everyone acts like there computer is garbage if the battery dies. GO BUY A NEW BATTERY. the battery is gonna go bad sooner or later. use your computer and enjoy it. end of story
     
  19. VSMacOne macrumors 601

    VSMacOne

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    Oct 18, 2008
    #20
    First of all, nobody on this thread has said their computer is garbage because their battery is bad or dead.

    Second of all, how does it affect you if other people want to take care of their laptops and maximize the lifespan?
     
  20. shady825 macrumors 68000

    shady825

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    #21
    There is battery threads all the time! Modern batteries are going to have a pretty good life span regardless. just use it!

    and your right, i just cant stand the fact that people take care of there macbooks! i cant even sleep at night knowing someone out there is cleaning there screen right now! oh my god!
     
  21. VSMacOne macrumors 601

    VSMacOne

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    Oct 18, 2008
    #22
    Outrageous!! :eek:
     
  22. iMacmatician macrumors 601

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    Jul 20, 2008
    #23
    Well that's something new. (I'm assuming this also applies to all subsequent models.)

    This also implies that previous models are affected by leaving it charged.
     
  23. iAppleONE thread starter macrumors member

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    Sep 14, 2008
    #24
    I'm currently using it without the battery installed will there be any long-term effects from this? (will the power source fry the logic board and cpu while it is turned off?):eek:
     
  24. tubbymac macrumors 65816

    tubbymac

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    Nov 6, 2008
    #25
    You won't fry anything, don't worry about that. But you will be drastically reducing performance. Post 6 in this thread has that link by silverback showing how big of a performance hit you take without the battery.
     

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