Battery Health query for a 2011 MBP

Discussion in 'Mac Basics and Help' started by Peter Franks, Apr 7, 2013.

  1. macrumors 65816

    Joined:
    Jun 9, 2011
    Location:
    London UK
    #1
    10.6.8
    2.3 GHz Intel Core i5
    4GB 1333 DDR3
    SL

    Out of interest people, what sort of health should a battery be in 2 years down the line? Battery life was never that great from day one, but it's now even worse.

    However....

    iStat is showing Health 94%

    And the OS says..

    Cycle Count: 292
    Condition: Normal

    I don't remember what is said before, does it ever say, 'good' etc. Is normal, the 'norm'?
     
  2. simsaladimbamba

    Joined:
    Nov 28, 2010
    Location:
    located
    #2
    292 cycles with 94% batter health is more than okay. I have 442 cycles in almost four years with now 92% health (though I had 89% the weeks before).

    And battery life is depending on a lot of factors like display brightness, WiFi/Bluetooth on/off, CPU activity and more.

    ______________________________________________________
    This should answer most, if not all, of your battery questions:
    Apple Notebook Battery FAQ by GGJstudios
    The F.A.Q. includes the following topics:
    • BATTERY INFORMATION
    • BATTERY LIFE FROM A CHARGE
    • AC POWER
    • CALIBRATION
    • BATTERY LIFESPAN
    • CHECKING STATUS AND HEALTH
    • CHARGING
    • WHAT IS A CYCLE?
    • BATTERIES ARE NOT COVERED
    • BULGING OR SWELLING BATTERY


    ______________________________________________________
     
  3. thread starter macrumors 65816

    Joined:
    Jun 9, 2011
    Location:
    London UK
    #3
    Thanks, I had very little going on today, just paperwork and not much else doing, but it went down really quick from 100% to 7% and that's why I was alerted to it.

    I get why it dies when I'm watching YouTube or Flash stuff, but today was pretty sparse and after a couple of hours it was gone. Was quite surprised.
     
  4. thread starter macrumors 65816

    Joined:
    Jun 9, 2011
    Location:
    London UK
    #4
    Also like to add, that since I've had this, I've never used the keyboard backlight, It's always off, but beginning to feel it makes no odds to battery life at all. Didn't help any.. Anyone else turn theirs off
     
  5. macrumors 65816

    Joined:
    Jan 3, 2010
    #5
    94% means it's good. Anything better than 80% is pretty good. When I bought my macbook, it was about 93% to start out with. Now more than 3 years later, it hovers from 84-87%. Using backlight shouldn't matter really, it's more about how many charges and discharges you go through.

    Actually the most important thing is not the percentages, but rather how long it lasts. If it lasts 7 hours when brand new, I would replace it when it lasts 3 hours or less.
     
  6. thread starter macrumors 65816

    Joined:
    Jun 9, 2011
    Location:
    London UK
    #6
    Sorry, I didn't see this.

    I've never had 7 hours from it, since new. It's at 92% now with 296.

    In fairness the only thing I really dislike about my MBP is the battery life. I really expected a lot more from battery when I switched to Mac, and sometimes it's a couple of hours at most. I don't think it was ever at it's peak, even when new. Maybe it was this model.
     
  7. macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #7
    Good is the same as normal. It's called "Good" in Leopard, "Normal" in SL and later versions of OS X.

    It is perfectly normal if your battery health (maximum capacity) is more or less than 100%, even when brand new, or if it fluctuates up or down over time. For further details, read the CHECKING STATUS AND HEALTH section of the following link.

    That's your battery charge level, not your battery health, that dropped from 100% to 7%.
    There are many factors that impact your battery life, and keyboard backlighting is one of the minor factors. See the BATTERY LIFE FROM A CHARGE section of the following link for details, including tips on how to maximize your battery life.
    Apple never claimed you would get 7 hours. They said "up to 7 hours".

    The link below should answer most, if not all, of your battery/charging questions. If you haven't already done so, I highly recommend you take the time to read it.
     
  8. thread starter macrumors 65816

    Joined:
    Jun 9, 2011
    Location:
    London UK
    #8
    Thanks, Yes, that was charge level, didn't mean health, obviously. I know it's up to 7 rather than definite 7, but I've never come anywhere near that.

    Due to my set up in my house, I've only ever used WiFi, it's never plugged in. Presume that makes a difference, but would think most use wirelessly anyway
     
  9. thread starter macrumors 65816

    Joined:
    Jun 9, 2011
    Location:
    London UK
    #9
    Just a quick ask...

    Is it normal that the health when I posted last on April 14 was showing 94% and now it's at 86% just a couple of weeks on? The cycle was 292 and now at 313, but should health deteriorate that quick, it's only been a few weeks?
     
  10. The-Pro, May 10, 2013
    Last edited: May 10, 2013

    macrumors 65816

    Joined:
    Dec 2, 2010
    Location:
    Germany
    #10
    It fluctuates and thats normal.
    my 2010 15" MBP has 678 cycles and a battery health of 91%. IMPRESSED! :) But last months it said 79% health. , usually it stays aroun 85-88 in the last year.

    If you put your screen brightness down below 50% and are just typing in Pages and browsing light webpages now and then you will easily get 7 hours.
    I have managed to get 9 hours out of mine doing the above. I strictly dont use Word because I found it hardly ever goes below 20% CPU usage and often times for no apparent reason goes up to 60 for fun, even when just typing plain text. So i always use pages as it its below 5% for about everything.

    If your battery drops too quickly for what you are doing, then check the activity monitor. Select all processes instead of my processes. In a lot of cases a printjob manager or some other task is hogging cpu and more then halves your battery life. See what is causing the cpu usage and quit the application if not needed.
    Flash adds on websites are a real pain. They can make the WebProcess (part of safari) spike up to like 40% then back down again every couple seconds. Huge impact on battery life. Find the webpage and close it, if the info on the website is text and important, save it in your reading list and read it there.
    Look into the clicktoflash and clicktoplugin safari extensions. They stop lots of flash ads from loading, better for ram usage and battery life.
     
  11. thread starter macrumors 65816

    Joined:
    Jun 9, 2011
    Location:
    London UK
    #11
    Thank you for your help. I can charge battery to 100% and come on here and within 3 minutes it's on 95. I have to use Word for Invoices but I don't use it every day, and don't own a printer. All my invoices are emailed as PDFs. I use Mail more than anything I suppose. And obviously Safari a lot. They are the 2 that are always open. I've turned off all the things I'm supposed to do and never ever use the keyboard lights, that's always off, but I still don't get great battery. I really think it's luck of the draw with the MBP because many get great life, and many also like me who bought the mid 2011 have had problems. One thing I will say, I only use on WiFi, which I know probably doesn't help much. But I can turn that off to watch an AVI film and get the same battery leak. I expect it watching films though. And I cant make it through a 2 hour DVD so don't even try anymore on this.
     
  12. thread starter macrumors 65816

    Joined:
    Jun 9, 2011
    Location:
    London UK
    #12
    Antique brass lights... Seriously?
    Yep, that's helped my battery problems
     

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