Why does my battery lose charge plugged in?

Discussion in 'MacBook Pro' started by luckyjack7, Jul 2, 2007.

  1. luckyjack7 macrumors newbie

    Joined:
    Jun 20, 2007
    Location:
    Beautiful British Columbia
    #1
    Can anyone tell me why my battery loses about 1% of it's charge per day? I'm plugged in, no peripherals, calibrated, already done an smc reset to sort out wake/sleep issues. Thought this problem was fixed too but its re-appearing. I charged 2 days ago and it's down to 98% today. Eventually it goes below 95% and re-charges to 100%.
     
  2. flopticalcube macrumors G4

    flopticalcube

    Joined:
    Sep 7, 2006
    Location:
    In the velcro closure of America's Hat
    #2
    Even if your battery was removed from your laptop, it would lose 1% per day. Its the battery's natural decay and is perfectly normal.
     
  3. Gandhi macrumors regular

    Joined:
    Jun 27, 2007
    Location:
    TX
    #3
    Lithium Polymer batteries have a tendency to explode when you over charge them beyond their capacity. AS a precaution, the charging is stopped once the battery is filled up, and the laptop runs on battery till it hits 95%, when the charging begins anew.
     
  4. JasonMac macrumors regular

    JasonMac

    Joined:
    Jun 6, 2007
    #4
    battery

    Yep mine does the same thing, its just the way it is.
     
  5. soLoredd macrumors 6502a

    Joined:
    Mar 12, 2007
    Location:
    California
    #5
    Yup this always bugged me but I finally let it go for about a week and once it dropped to 94%, it began to charge again back to 100%. I just think it's normal for the battery.
     
  6. dcv macrumors G3

    Joined:
    May 24, 2005
    #6
    Yeah that sounds "normal". Just be thankful you don't have my machine, which discharges the battery at a rate of 3 to 4% per hour... even when turned off it seems :rolleyes:
     
  7. dcv macrumors G3

    Joined:
    May 24, 2005
    #8
    No that's something a little different. The battery doesn't charge unless the capacity drops below about 93/95% to avoid short charging cycles. The OP is talking about the battery losing a little charge each day.
     
  8. luckyjack7 thread starter macrumors newbie

    Joined:
    Jun 20, 2007
    Location:
    Beautiful British Columbia
    #9
    Thanks, people!

    Thanks, people, this is such a smart group! This is my first notebook and the battery seemed funky to me.
    I can never find what I want on the "apple" site.
     

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