9 Replies Latest reply: Dec 4, 2012 11:40 PM by Csound1
ramoram3 Level 1 Level 1 (0 points)

Hi all,

 

I've had my MBP now for just about 3.5 years. It's a 2.4 GHz C2D, 4GB RAM mid-2009 model. It's currently running 10.8.2 (I keep up-to-date quite religiously).

 

Anyhow, my battery life has always been quite decent -- lasting variably between just under 2 hours and 3.5 hours. I try to be quite cognizant of what is "good" for the battery by avoiding constant charging and occasionally letting it drain to 0% in order to recalibrate. In the last several weeks, it's "condition" appeared to start deteriorating..at least according to Mac OS X's discretion, and changed to "Replace Soon." This worried me, so I installed the "Battery Health" app and consulted iStat Pro to see what they were telling me; both indicated that my battery was still an upper 80% in health.

 

This brings me to yesterday. I had taken my MBP all over with me throughout the day with no issue, and then brought it back to my apartment that evening. I left it charging and took a 1 hour nap. When I woke up, the charger indicated green but the battery indicator was flashing when I clicked it; when I opened my computer, it had a "charged" symbol but was at 0%. The condition had also suddenly changed to "Replace Now." In other words, if I disconnect the charger at all, the computer immediately dies.

 

Do y'all have any advice about what could have caused this so suddenly and dramatically, and whether it's at all remediable without getting a battery replacement (this model doesn't let you easily replace the battery)? To speak the obvious, it's incredibly inconvenient and ultimately untenable, but I'm not sure if I can hold Apple at fault since it's obviously OOW.

 

Thank you!


MacBook Pro, OS X Mountain Lion
  • 1. Re: MacBook Pro Battery suddenly dying
    OGELTHORPE Level 7 Level 7 (25,815 points)

    Based on what you have said, a new battery is in order.  You got a warning (replace soon) and it has died (replace now).   Lithium ion batteries give little notice when they fail.  If you have had the same battery for three and one half years, you have enjoyed good service from it.  Remember a battery will not last the lifetime of the MBP, just as tires will not last the lifetime of an automobile.

     

    What you have experienced is not out of the ordinary.

     

    Ciao.

  • 2. Re: MacBook Pro Battery suddenly dying
    ramoram3 Level 1 Level 1 (0 points)

    Hey, thanks for your input.

     

    Please note my typo, though, which may or may not change the logic behind your statement: the computer is actually 2.5 years old and is a mid-2010 model, not 2009. This is one of the reasons for my confusion and distress; I know many, many people with macbooks and macbook pros 3.5 years and older and none have had battery failure or replacement as of yet. I also know that these Li-ion should last at least 3 years, and even then should not spontaneously fail the next day. That said, this is only anecdotal evidence.

  • 3. Re: MacBook Pro Battery suddenly dying
    OGELTHORPE Level 7 Level 7 (25,815 points)

    A battery's life span is also a function of use it has had.  Time is not the only determinant.  To use the automobile analogy, 50,000 in one year will result in a similar degradation as 50,000 miles in three years.  For your battery you can check in SYSTEM PREFERENCES>HARDWARE>POWER>BATTERY INFORMATION>CYCLE COUNT and get an idea of the amount of use it has had. 

     

    Given a large sample of identical batteries, some will fail very early, most will be in expected life span and some will last much longer.  That is the nature of the beast.  Yours may have been one of the early ones. 

     

    The fact remains that, based on what you have reported, you have a battery that needs to be replaced.  There is no way around that fact.

     

    Please don't shoot the messenger!

     

    Ciao.

  • 4. Re: MacBook Pro Battery suddenly dying
    ramoram3 Level 1 Level 1 (0 points)

    Indeed, this is true. My cycle count stands at 1415, thanks for pointing that out. Of course, statistical probability is another valid, if hard to evidence, argument. Forgive me if I seemed like I was attacking your response -- I certainly didn't mean to! Thanks again for your help!

  • 5. Re: MacBook Pro Battery suddenly dying
    Csound1 Level 8 Level 8 (35,455 points)

    ramoram3 wrote:

     

    Anyhow, my battery life has always been quite decent -- lasting variably between just under 2 hours and 3.5 hours. I try to be quite cognizant of what is "good" for the battery by avoiding constant charging and occasionally letting it drain to 0% in order to recalibrate.

    Running the battery to 0% should be avoided, it is bad for the battery (this is not a Nicad), it will have accelerated your battery's demise. When you get a new battery try to refrain from the practice.

  • 6. Re: MacBook Pro Battery suddenly dying
    OGELTHORPE Level 7 Level 7 (25,815 points)

    A cycle count of 1415 is well above average.  You certainly got a lot of mileage out of it.  Aside from the excellent advice from Csound 1, when ever possible, use the power adapter.   You may find these articles of interest:

     

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

     

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

     

    My 'messenger' comment was less of fear of an admonition from and more of the stupid humor that I am prone to on occasion.

     

    Ciao.

  • 7. Re: MacBook Pro Battery suddenly dying
    ramoram3 Level 1 Level 1 (0 points)

    Thanks for your response, Csound1. I am confused, however, at your assertion that Li-ion batteries need not, and even should not, be recalibrated by draining them (as opposed to Nicad). This really flies in the face of what I have learned, heard, and read over the past several years. Note just a couple sources:

     

    https://discussions.apple.com/thread/2411282?start=0&tstart=0

     

    http://support.apple.com/kb/HT1490

     

    I am interested in hearing your (and anyone else's) viewpoint on this matter. Thanks again for the responses!

  • 8. Re: MacBook Pro Battery suddenly dying
    Csound1 Level 8 Level 8 (35,455 points)

    Check out the Battery University for data but Lithium Ion batteries do not react well to a full discharge, recharge at 20-50% is optimum. This is not to say that the occasional dip down will kill the battery, but it can have an effect on the overall health.

     

    Calibration is rarely needed.

  • 9. Re: MacBook Pro Battery suddenly dying
    Csound1 Level 8 Level 8 (35,455 points)

    ramoram3 wrote:

     

    Thanks for your response, Csound1. I am confused, however, at your assertion that Li-ion batteries need not, and even should not, be recalibrated by draining them (as opposed to Nicad). This really flies in the face of what I have learned, heard, and read over the past several years. Note just a couple sources:

     

    https://discussions.apple.com/thread/2411282?start=0&tstart=0

     

    http://support.apple.com/kb/HT1490

     

    I am interested in hearing your (and anyone else's) viewpoint on this matter. Thanks again for the responses!

    Here some information about prolonging (or maximizing) the life of a Li-ON or Li-Poly battery