Battery Health (not Charge)

Discussion in 'MacBook Pro' started by beginner0, Jul 5, 2007.

  1. beginner0 macrumors member

    Joined:
    Jan 23, 2007
    #1
    I got my MBP yesterday, calibrated the battery last night and noticed (from iStat) that the battery health is 96% (and the battery charge is at 100%). Is the health an indiation of wear? If so, is 96% for a new laptop normal? Thanks.
     
  2. liketom macrumors 601

    liketom

    Joined:
    Apr 8, 2004
    Location:
    Lincoln,UK
    #2
    the day the battery left the factory it was on a downhill slide

    this is normal

    Enjoy your new Mac
     
  3. dcv macrumors G3

    Joined:
    May 24, 2005
    #3
    96% health for a brand new machine? I'd call that 'acceptable' but not quite 'normal'; surely it should be 100% health for a new battery in a new machine. Maybe try re-calibrating it.
     
  4. Sly macrumors 6502

    Sly

    Joined:
    Nov 30, 2003
    Location:
    Airstrip One
    #4
    Try not to drain you battery to 0% every time, it kills it fast. Keep it as cool as possible, i.e. take it out of the computer when it is plugged in to mains power. Do both of these things and your battery should last a good few years.
     
  5. liketom macrumors 601

    liketom

    Joined:
    Apr 8, 2004
    Location:
    Lincoln,UK
    #5
    errr why not ? i drain mine once every 2 months and then fully charge it my batt is fine on my macbook
     
  6. jdavtz macrumors 6502a

    Joined:
    Aug 22, 2005
    Location:
    Kenya
    #6
    You're not saying the same thing ("every time ... why not? ... once every 2 months").

    Apple do recommend the one-to-two monthly drain/recharge as liketom said.

    Is there any data published about regular full drain/recharge cycles killing the battery?
     
  7. mad jew Moderator emeritus

    mad jew

    Joined:
    Apr 3, 2004
    Location:
    Adelaide, Australia
    #7
    I dunno about taking the battery out though. It leaves the connectors awfully vulnerable to the outside elements.
     
  8. liketom macrumors 601

    liketom

    Joined:
    Apr 8, 2004
    Location:
    Lincoln,UK
    #8
    yep i'm sure your right there MJ, moisture in the air will no doubt help corode the connectors quicker
     
  9. Sly macrumors 6502

    Sly

    Joined:
    Nov 30, 2003
    Location:
    Airstrip One
    #9
    Yep, try this for a start Battery University
     
  10. NYRngrs24 macrumors member

    Joined:
    Jun 12, 2007
    #10
    Is this normal? I have done 9 cycles, two which ended up be the calibration method. First calibration was on purpose, the second was a mini one. It just happend to die when I was about to go to bed, and I didn't want to leave the charger plugged in for so many hours. thinking it was a bad thing. but anyway, maybe battery is at 95% health.. yesterday was 96%. I have had the laptop for maybe about a week. when i got the battery it was 98% health... Coconut battery said it was 4 weeks old, so im guessing thats when the battery was first put in?
     
  11. mad jew Moderator emeritus

    mad jew

    Joined:
    Apr 3, 2004
    Location:
    Adelaide, Australia
    #11
    It's not necessarily bad to leave the charger plugged in for many hours. In fact, it's arguably good for the battery. :)
     
  12. NYRngrs24 macrumors member

    Joined:
    Jun 12, 2007
    #12
    then whats all this "over charge" i hear with all these battery powered devices?
     
  13. mad jew Moderator emeritus

    mad jew

    Joined:
    Apr 3, 2004
    Location:
    Adelaide, Australia
    #13
    Overcharging a battery will harm it. Your Mac laptop has mechanisms in place to prevent overcharging. Treat the machine well as outlined in this thread and it won't happen. :)
     
  14. ericbeezy macrumors newbie

    Joined:
    Jun 27, 2007
    #14
    your macbook will automatically stop charging when it is fully charged. if you have coconutbattery it'll even show that it is no longer charging when fully charged and your macbook will just run off of the power adapter.
     
  15. jfm010 macrumors newbie

    Joined:
    Oct 16, 2006
    #15
    I think my MBP SR started out at 96% health and after 4 cycles went to 100%.
     
  16. hohohong macrumors 6502

    Joined:
    Jun 1, 2007
    #16
    My battery stays at 98% with my AC plugged. Yesterday, it went to 100%,.... is this normal? I just got this MBP SR 1 week ago.
     
  17. magius macrumors regular

    Joined:
    Jun 3, 2007
    #17
    yup thats normal.

    the question here is about battery health - I've had my mbp for two plus weeks and my health on istat still says 100%....
     
  18. topher2889 macrumors regular

    topher2889

    Joined:
    Jun 1, 2007
    Location:
    Wisconsin
    #18
    2 Month old MB at 94% health

    I have had my 2.16 Ghz for about two months now and coconut says that my battery health is down to 94%. What gives? Battery life is decent I guess but the health has been ever decreasing since the day I got it when it was at 5180 mAH, now it sits at 4903 mAH.

    As you can see from below, It only has 6 cycles!

    [​IMG]
     
  19. clickclickw00t macrumors regular

    Joined:
    Jun 28, 2007
    #19
    When you take your battery out while plugged in, your mac will run at 1ghz not 2.2.
     

Share This Page