MBP 13" battery draining while on AC Power????

Discussion in 'MacBook Pro' started by jmazzamj, Jun 24, 2010.

  1. jmazzamj macrumors regular

    Joined:
    Jun 11, 2009
    #1
    Hi everyone. I have checked MRoogle with no luck and I really really hope you can help me out with my battery issue.

    The title says it all, basically my MBP's battery drains even if the computer is plugged. When I sat at my desk to use my MBP earlier today I noticed the battery was charging. That seemed very weired, I was sure it was at 98% last night. I decided to switch my computer off and let it charge all the way up.

    When I turnt on my computer again i checked the battery and everything seemed normal, but after half an hour or so I noticed that my battery status icon had chaged from charged to not charging.

    I loaded up Coconut battery and the battery was slightly over 90%...and it's still draining out while tipyng...

    The AC socket is fine and I have an HDTV connected to the same power source. Needless to say the tv is working normally...

    Any advice? I do not have an Apple shop nearby, the closest is over 200 km (approximately 140 miles) away.

    Cheers from Italy...

    EDIT: I have reset the SMC with no luck.
     
  2. trfjason macrumors member

    Joined:
    May 28, 2010
    #2
    I think it is normal for the battery to self discharge. My MBP is plugged into an AC outlet for most of the time and the battery % does decrease over time even on AC power. In my case, after the MBP is charged to 100%, the % decreased to 95% despite that I only used it on AC power.

    The MBP will not charge the battery unless the capacity is less than 95%
     
  3. djasterix macrumors 6502a

    djasterix

    Joined:
    Apr 10, 2010
    Location:
    Paradise City
    #3
    That's normal with this new batteries, we just have to get used to...
     
  4. jmazzamj thread starter macrumors regular

    Joined:
    Jun 11, 2009
    #4
    Hi guys and thanks for your replies but I can assure you that this specific issue is not normal.

    My battery charge decreased over 20% in less than one hour while connected to AC and I only had Safari with few tabs and Mail running.

    Im currently calibrating the battery...I hope this helps.

    Thank you again.
     
  5. jmazzamj thread starter macrumors regular

    Joined:
    Jun 11, 2009
    #5
    Hi everyone.

    Resetting the SMC after a battery calibration seems to have solved the issue.

    Thank you
     

Share This Page