New Macbook giving me horrible battery

Discussion in 'MacBook' started by sn00pie, Sep 16, 2008.

  1. sn00pie macrumors 6502a

    sn00pie

    Joined:
    Jun 25, 2008
    Location:
    United States
    #1
    Purchased roughly 2-3 weeks ago. According to CocunotBattery i've had 9 cycles, and current battery capacity is 5029 mAh, original capacity = 5020 mAh. Right now its at 80% (4052 mAh) and it's telling me I have 2.04 hours of battery left.

    Thats nowhere near the 4.5 hours I'm expected, and I've noticed its running way too hot. CPU A is running at 66 and the Airport Card is at 69, and its been idle for 20 minutes.. btw I bought 3 year AppleCare but I haven't registered it yet...

    My brightness is on 20-30%, bluetooth off, wifi on.
     
  2. pjrobertson macrumors 6502a

    Joined:
    Nov 14, 2007
    #2
    Funny you should say that. I was just going to post to say how my battery life seems to have shot up after the 10.5.5 update.

    After the update I turned on my Mac and realised I had 6 hours battery life!

    If you turn Airport off you'll get the 4 hours promised. Changing the brightness from full to ~20% doesn't really make that much difference, you have to turn it all the way off.

    My battery has a full charge capacity of 5168mAh after 63 cycles. It sounds like you battery might be duff or you need to recalibrate. Have you done this recently; fully charged your Mac, run the battery all the way down till it turns off. Leave it for 3 hours, then fully charge it again.

    See here:

    http://support.apple.com/kb/HT1490
     
  3. TEG macrumors 604

    TEG

    Joined:
    Jan 21, 2002
    Location:
    Langley, Washington
    #3
    Take it to an Apple Store and have them look at it, it doesn't sound normal.

    Then again, the battery life is with, brightness at +1, processor at Reduced Speed, Wi-Fi Off, and Hard Drive set to sleep.

    TEG
     
  4. sn00pie thread starter macrumors 6502a

    sn00pie

    Joined:
    Jun 25, 2008
    Location:
    United States
    #4
    I just updated to 10.5.5 now and it's saying 58% with 3:30 to go. But I doubt that is a realistic calculation. I'm actually timing it on my watch, so I will have a real number regarding the actual battery life.

    I'm at 40% brightness, wifi on, BT is off, no usb devices connected, and the battery was "calibrated" yesterday when I used it from 100% all the way till it put it self to sleep, and I recharged it to 100% and now I'm doing this timing "test" :)

    Edit: I don't understand what caused the CPU to get so high when I posted this thread. Maybe cause I had it sitting on my bed? Right now its on my desk and CPU A is at 41 (iStat Pro), compared to 66 at the time of posting this thread.

    Good news is it's telling me 2:36 with 53% battery left. Maybe OS X was trying to confuse me into updating it?
     
  5. hogfaninga macrumors 65816

    hogfaninga

    Joined:
    Aug 16, 2008
    Location:
    Chestnut Tree Cafe
    #5
    It is weird b/c each Macbook/battery does seem to act differently. I use 90% brightness(I don't see how you guys use 30-60%), wifi always on, and BT on(I have BT mouse. I get about 3-3 1/2 hours on my battery.
     
  6. *Sandy* macrumors 6502

    Joined:
    May 15, 2008
    Location:
    Always in a path of a Hurricane!
    #6
    My last macbook also bought almost a month ago, is getting much better batt. life then my previous MB
     

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