My battery is strange...

Discussion in 'MacBook Pro' started by nmamur, Mar 17, 2007.

  1. nmamur macrumors member

    Joined:
    Sep 8, 2006
    Location:
    new york
    #1
    It charges fine until about 85% and then it slows down to a trickle(estimated time is about 45 mins to completion). Im pretty sure this wasnt an issue earlier. I cant remember the exact event, if any, that made this start.

    Any thoughts?
     
  2. SuperCompu2 macrumors 6502a

    SuperCompu2

    Joined:
    Jul 23, 2006
    Location:
    MA
    #2
    have you tried removing the cord, waiting a second or two and plugging back in? This has allowed it to charge further for me on occasion with a PowerBook my friend had.

    Good luck.
     
  3. bwanac macrumors regular

    Joined:
    Mar 27, 2006
    #3
    Dont macbooks have quick charge up to some percentage, and then real slow to the max.
     
  4. iBenzin macrumors member

    Joined:
    Mar 9, 2007
    #4
    isnt that how most batteries work?
     
  5. orangemacapple macrumors 6502

    Joined:
    Sep 1, 2006
    Location:
    Raleigh
    #5
    when was the last time you calibrated your battery? that should clear things up a bit.
     
  6. deadpixels macrumors 6502a

    deadpixels

    Joined:
    Oct 30, 2006
    #6
    read this :

    Charge!
    The batteries found in laptops (iBooks, Powerbooks, MacBooks) and iPods charge in two stages.

    The first stage is a rapid charge that pummels the battery with constant amperage and steadily increasing voltage. When the battery charges to 70% - 80% capacity, stage two begins, steadily decreasing the current while holding the voltage steady until the battery is fully charged.

    Stage two is commonly referred to as the "trickle" or "topping-off" charge and normally takes tree times as long as stage one. One myth is that Lilon battery life will be maximized by frequently draining the battery to 0% and then charging back up to 100%. While grabbing a few minutes of charge time here and there will eventually cause inaccuracies in the battery's reported battery-charge and remaining-life times.

    taken from here
     

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