New MBP, Coconut battery says 94% capacity

Discussion in 'MacBook Pro' started by tigress666, Jun 9, 2010.

  1. tigress666 macrumors 68040

    Joined:
    Apr 14, 2010
    Location:
    Washington State
    #1
    Ok, I know I wasn't going to get the 10 hours that Apple brags, but I was kinda hoping it would at least be 6-7.

    So I decided to finally test the battery today (I did calibrate it by powering it to full, draining the battery, and after more than 5 hours rest i charged it to full again, using it during time).

    First it shocked me but then I rememberd I had Sims 3 (just got it today) running in the background and I remember some one saying that game sux battery (it has anywhere from 1-3 hours to play Sims). So I turned it off. Right now battery is at 85%, with brightness to half, wifi on, using Firefox and terminal, and it's telling me anywhere from 4 hours 20 minutes to (right now) it said 5 hours (it does tend to change).

    Oh, and how much life it tells me it has jumps around a lot. Like 2 minutes ago it was saying 5 hours, a few minutes before that it was saying 4 hours and 23 minutes. And now I just turned off bluetooth and it went to four hours 20 minutes.

    So I checked what cocout battery said and it told me I had 94% capacity on this battery (I mean the battery is supposedly now only able to do 94% of its capacity).

    Do you think maybe I calibrated it wrong? I let it drain while I was at work so I wasn't sure when it went off so I waited five hours after I got back from work to plug it in and use it again. And anytime it was powered in I used it (the instructions said I could).

    Or should I be worried?
     
  2. Bill Gates macrumors 68020

    Bill Gates

    Joined:
    Jun 21, 2006
    Location:
    127.0.0.1
    #2
    What did you do to fully drain the battery? Typically the MBP just goes to sleep after a set period of inactivity.
     
  3. tigress666 thread starter macrumors 68040

    Joined:
    Apr 14, 2010
    Location:
    Washington State
    #3
    Uh, I let it stay on with wifi (it was on for more than 10 hours by the time I got home and it would not wake up so I assumed I had gotten to the point I needed it to be). And I think I told it not to go to sleep at all in the settings (though I did say it could turn off display cause it freaked me out about saying that was bad for the display).
     
  4. Bill Gates macrumors 68020

    Bill Gates

    Joined:
    Jun 21, 2006
    Location:
    127.0.0.1
    #4
    It sounds like you calibrated it correctly. 94% does sound a little low, but give it a week or so of use and see if that number changes for the better. If not I would say you have cause enough for Apple to replace the battery.
     
  5. 530farm macrumors member

    Joined:
    Apr 6, 2010
    #5
    after calibrating mine, and checking coconut battery mine was at around 97% w/ only 2 cycles on the battery. FOr somereason now it is at 100% w/ 6 cycles. I would use it a little more and check again later.
     
  6. Madin macrumors newbie

    Joined:
    Apr 24, 2010
    #6
    same thing happend here.
    As it turns out the capacity readings tent to fluctuate.
    Take a look at the screenshot. Went down to 94% two times already but came back to (near) 100%. Right now, it seems to stay at well above 100%.

    Keep an eye on it and just enjoy your MBP :)
     

    Attached Files:

  7. blackwind macrumors regular

    Joined:
    Sep 30, 2008
    #7
    Same here. Brand new out the box (fully charge) then install coconutbattery.
    11 Cycle on it. with 7weeks old. and 94% only..

    After I've done 2 battery Calibrations. It shows 100% :)

    Cheers
     

Share This Page