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  1. #1
    MacBook battery capacity down...
    shahvikram123's Avatar
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    13 inch Macbook Pro Retina, 2.7ghz, 128gb SSD
    Question MacBook battery capacity down...
    I've had my Macbook for about 15-16 months and my battery capacity has dropped down to 5136 from 5200 (which is the original battery capacity).

    According to coconut battery this is a 2% drop - so the current battery capacity for my macbook is now 98% and it doesn't go up.

    So far I've calibrated the battery, but the battery capacity doesn't seem to go up to 100%.

    Does anyone know how to make my battery capacity 100% again.

    By the way, I've had about 370 load cycles; could this be the reason as to why my battery capacity has decreased by 2%

  2. #2
    MacBook battery capacity down...
    bryphotoguy's Avatar
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    Batteries do loose their charging capacity. From what I've seen around here, you have a very strong battery.

    January 2008 Member of the Month

  3. #3
    MacBook battery capacity down...
    ogacon's Avatar
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    98% is very good... Batteries should never be FULLY full anyway (such as in charged to 100%, you don't want to overcook things either ya know?), as it makes it wear out more. I'd be very happy with 98% after 15 months, and 370 cycles.
    Relay For Life Support me in Relay For Life! Run by American Cancer Society. Cancer research.
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  4. #4
    MacBook battery capacity down...
    shahvikram123's Avatar
    Member Since
    Nov 16, 2006
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    98% is very good... Batteries should never be FULLY full anyway (such as in charged to 100%, you don't want to overcook things either ya know?), as it makes it wear out more. I'd be very happy with 98% after 15 months, and 370 cycles.
    Batteries do loose their charging capacity. From what I've seen around here, you have a very strong battery.
    Ah ok, thanks for your help…

    So when do you think I should think about getting a new battery. I mean after how much of a % drop. I ask because I'm going to be going University in a few months and I would need my Macbook 'on the go' a lot more. How long do you think the battery will last before its unusable...

  5. #5
    MacBook battery capacity down...
    ogacon's Avatar
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    I'm not sure about that one, but I have a question for you. How do you use your battery? Have you kept it plugged in or constantly drain/recharge? I ask because I want my battery to last that long
    Relay For Life Support me in Relay For Life! Run by American Cancer Society. Cancer research.
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  6. #6
    MacBook battery capacity down...
    bryphotoguy's Avatar
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    Wait and see how the battery stands up in a few months. It's not going to work great one day and completely go bad the next day.
    You'll have plenty of time to order a new one when you will need a replacement.

    January 2008 Member of the Month

  7. #7
    MacBook battery capacity down...
    shahvikram123's Avatar
    Member Since
    Nov 16, 2006
    Location
    UK, London
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    637
    Specs:
    13 inch Macbook Pro Retina, 2.7ghz, 128gb SSD
    I just kept my Macbook plugged in most of the time, but I calibrate it about once or twice a month. Also about once a week or so I would use it just off the battery till it gets about 60-70% then charge it up again.

    As far as I'm aware you should avoid draining the battery and then charging it back up too much and also avoid leaving it plugged in for too long (e.g. a few weeks).

    Hope this helps!

  8. #8
    MacBook battery capacity down...
    dakineyj's Avatar
    Member Since
    Jan 24, 2007
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    Kailua Kona, HI
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    Specs:
    MBP 15", 2.66GHz Intel Core 2 Duo, 4GB RAM, OS X 10.8.2, iPad 1, 80gb iPod, ATV 1, iPhone 5
    You should replace the battery when the time running on the battery diminishes to the point that is unacceptable to you. Now for me, I have 81% on 125 cycles. It is only lasting about 2 hours and Full charge capacity (mAh): 4543

  9. #9
    MacBook battery capacity down...
    dr_doof's Avatar
    Member Since
    Mar 19, 2008
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    2.4GHZ Macbook (black), OSX Leopard 10.5.5, 1GB Shuffle,4GB Nano,2GB nano 2nd generation
    i was told it's best if you occasionally let your battery drain fully- about once per month. it lets the lithium ion batteries 'remember' their full capacity. i'm not sure why mine said 5172 (after 37 cycles) and now 5228 after 41 cycles as full charge. :S
    Chat Potatoes

  10. #10
    MacBook battery capacity down...
    shahvikram123's Avatar
    Member Since
    Nov 16, 2006
    Location
    UK, London
    Posts
    637
    Specs:
    13 inch Macbook Pro Retina, 2.7ghz, 128gb SSD
    My Macbook battery capacity has gone down even more!! its at 93% capacity now.... whens it going to stop!!!!!!
    Vikram Shah

  11. #11
    MacBook battery capacity down...

    Member Since
    Apr 02, 2008
    Location
    Austin, TX
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    MacBook 2.2GHz
    with 370 cycles, your battery may be on the way out. Monitor it, and see if it continues to drop. If so, I'd plan on picking up a replacement soon.


    When you do get a new one, remember to discharge it (to probably 20% or so) at least once a month, then fully charge it. Lithium batteries like to be exercised, and do not like to be left plugged in constantly.
    The very existence of flamethrowers proves that some time, somewhere, someone said to themselves, "You know, I want to set those people over there on fire, but I don't want to have to walk over there to do it."

  12. #12
    MacBook battery capacity down...

    Member Since
    Mar 30, 2008
    Location
    Pensacola, FL
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    5
    Specs:
    MBP 2.2Ghz
    New owner and user, and ignorant of how to check the battery. What is the procedure for checking capacity, and recalibrating?

    Jack
    Jack

  13. #13
    MacBook battery capacity down...

    Member Since
    Apr 02, 2008
    Location
    Austin, TX
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    Specs:
    MacBook 2.2GHz
    JP, there is no recalibration process, afaik. (the meter in the task bar will sometimes read less than 100% when it is fully charged. Running it down a little and charging it back up usually resolves)

    There's a widget called iStat that can show you stats on the battery.
    The very existence of flamethrowers proves that some time, somewhere, someone said to themselves, "You know, I want to set those people over there on fire, but I don't want to have to walk over there to do it."

  14. #14
    MacBook battery capacity down...
    dakineyj's Avatar
    Member Since
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    Apple Menu > About This Mac > More Info... > Select "Power" > Battery Info

  15. #15
    MacBook battery capacity down...

    Member Since
    Apr 02, 2008
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    Austin, TX
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    Specs:
    MacBook 2.2GHz
    Quote Originally Posted by dakineyj View Post
    Apple Menu > About This Mac > More Info... > Select "Power" > Battery Info
    Yeah... or that.
    The very existence of flamethrowers proves that some time, somewhere, someone said to themselves, "You know, I want to set those people over there on fire, but I don't want to have to walk over there to do it."

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