MBP Mid 2009 - Repair Battery Message

Hi everyone.
I have a Mid 2009 MBP running with Lion. I've notice a message that says "Repair Battery" under system preferences/battery.
I didnt noticed anything strange with my battery life, but I want to know if I have to do something.
Anyone got hint??
Thanks

Guess what. I decided to reboot the system, format the HD, and reinstall everything. Im now on Lion again, and the "service baterry" message has disappear.
My baterry now claims:
Battery Information:
  Model Information:
  Serial Number:          W0947B66C77YC
  Manufacturer:          SMP
  Device Name:          bq20z451
  Pack Lot Code:          0
  PCB Lot Code:          0
  Firmware Version:          3
  Hardware Revision:          3
  Cell Revision:          100
  Charge Information:
  Charge Remaining (mAh):          4402
  Fully Charged:          No
  Charging:          No
  Full Charge Capacity (mAh):          5209
  Health Information:
  Cycle Count:          346
  Condition:          Normal
  Battery Installed:          Yes
  Amperage (mA):          -1182
  Voltage (mV):          11817

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    I can, if so inclined, easily destroy a lithium battery within 300~400 'cycles'   (cycle count is not what ruins a battery within 1 to 3 years...., its short term abuse).
    I use it all morning on battery charge and at noon switch to plug it on charger.
    You didnt answer the ONLY important question............do you often drain the battery very low?
    Cycle counts mean almost nothing .........there is a huge myth about charging cycles. (see below)
    Proper understanding of a battery charge cycle
    A charge cycle means using all of the battery’s power, whether that is at once, or over several shorter battery discharges and recharges.
    Two examples for clarification:
    As a first example, where one fully charged battery is discharged down to 10%, then fully recharged, then using 10% of that full charge, this counts as 1 cycle since the total of both discharges is 100% of a full charge of use.
    In the second example, where one fully charged battery is discharged down to 40%, then fully recharged, then using 40% of that full charge, this also counts as 1 cycle since the total of both discharges is 100% of a full charge of use.
    While both examples are that of a single charge cycle, the first example is more aggressive against the lithium battery chemistry than is the second example. In short, collective overall gentle shallow or mid-range draining of your lithium battery is a better use condition than is the first example of deep-draining of the battery.  While both are quantitatively identical as a single charging cycle, they are wholly different qualitatively on the battery chemistry, which is directly related to its ultimate longevity and health.
    In short, it is the near and mid-term life of the battery as relates to its proper care (or lack thereof) that is to be looked after.
    Priorities in order of decreasing importance for battery care are:
    1. Avoiding deep discharges of the battery.
    2. Avoiding having your battery constantly on charge or on charge and in sleep mode.
    3. When playing graphics intense games, use your notebook plugged in when possible.
    4. Reduction of battery cycles by plugging into power when on the go, or when accessible.
    A person who has, for example, 300 charge cycles on their battery and is recharging at say 40% remaining of a 100% charge has a better battery condition state than, say, another person who has 300 charge cycles on their battery and is recharging at say 10-15% remaining on a 100% charge. DoD (depth of discharge) is vitally important on the wear and tear on your Macbook’s battery, much more so than is the counting of charge cycles. There is no set “mile” or wear from a charge cycle in specific. Frequent high depth of discharge rates (draining the battery very low) on a Lithium battery will greatly hasten the lowering of maximum battery capacity.
    Understand that a charge cycle is a general parameter of use, but is not directly related to the short-term or mid-term abuse of the battery, which can rapidly hasten a shorter lifespan, regardless of what the actual cycle count on the battery indicates.
    Proper considerations for near-term care of the battery is of utmost importance. Abuse of the battery is entirely avoidable, long-term eventual old age deterioration of the battery is entirely unavoidable.
    Apple’s adaptive charging system mitigates much potential for accidental battery misuse or abuse; however it is still readily possible to abuse the battery and thereby affect battery health.

  • Mbp mid 2009 dead screen

    Hi!
    The screen is dead (i have tried to use a flashlight on it to see that its not just the lights) on my mbp, the rest of the computer works perfectly. I use my tv as display atm.
    I have tried reseting the PMU and started in safe mode etc, no result. 
    Is it possible that some internal cord is just loose? or do i need to replace the entire screen?
    Thanks for your help!
    /Antonio

    If the external monitor works, then the diplay is faulty or the connection to the display has failed.  You may take it to an Apple store genius bar for a free diagnosis.  Ant repair costs will be quoted and you may make an informed decision.
    Ciao.

  • MBP mid 2009 indicate no hardware installed for wifi. Why?

    After installing a second hard drive to my MBP, the wifi icon changed to grey and indicated no hardware installed. Any solution for this?

    This message comes up when your Mac no longer recognizes that there is an operational AirPort card installed. This can be due to a number of reasons, including card or antenna cabling failure.
    You can try either a PRAM or SMC reset. Which you choose will depend on the exact model of your Mac, but most likely, a visit to your local Apple Store is in order.

  • MBP mid 2009 sudden HDD issues / slow and unresponsive

    Hello all,
    First of all i want to apologize if there was a similar topic, but ive tried looking with no result. I am in a big crisis and i think this forum is my only way of finding a solution.
    The problem started yesterday, when all of a sudden my computer became unresponsive (finder and apps), although music from itunes continued playing. I had no choice but to **** it down with the button.
    When i turned it back on, i got the blinking folder with the question mark. Tried all the advice with no success. Then i opened the computer, checked the flex cable and the hdd which both seemed fine. Closed it back up, started it up again and the same story. Then i moved the computer after half an hour and the thing booted normally. The only obvious thing was that programs tended to freeze for a minute or two and i get the umbrella and then it works.
    Since im a photographer i have lots of work on it and immediately bought an external hdd for backup. Time machine wasnt successful since it worked so slowly and it worked on intervals. 2 mins of copying, 5 mins of nothing and really slow ( the hdd graph in activity monitor showed continious spikes with a flat line inbetween. I gave up on that and now im copying the important stuff manually which seems to be working fine.
    However the computer still has a big issue - i am hoping its the flex cable, since it suddey started working. In case of hdd failure i dont think i would be able to get back in and use it? The hdd is a year old, its the seagate hybrid - momentus 750xt and the os is mountain lion.
    Does anyone have a clue or a tip what to do? I have to order the flex cable via ebay since there are no authorised deLers for apple that have spare parts available here in Lisbon, Portugal. Im afraid making a clean install wont help , although on a windows computer id do that the first thing..
    Thanks a lot for any help, im desperate and i have a few weddings to edit this month, and since i study abroud this is the only xomputer i can use!
    Regards, Jaka

    It does seem to be the internal cable or connection is faulty, but only on an intermittent basis. 
    My suggestion is to backup your data on an external HDD using Disk Utility>Restore or Carbon Copy Cloner.  This will create a drive that will enable you to boot your MBP and use it externally until you get your cable replaced.
    Ciao.

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