Results 1 to 8 of 8
  1. #1


    Member Since
    Aug 08, 2006
    Posts
    84
    battery estimate
    im a little worried as to the health of my battery. just last week, my 93% charge would estimate me about 2.45-3.15 hrs. now, my 92% is at 1 hr 38 minutes. im running the same two apps (mail, safari for homework) that i was running last week.

    is this type of abrupt battery drop off common?

    P.S. does a bigger HD require the fans to turn on more? i used to average about 1500 rpms with my 80gb, now im hovering around 2700 rpms with my 250gb. perhaps this is a reason for the battery drain?

    or it could just be paranoia

  2. #2

    raptorkid700's Avatar
    Member Since
    Sep 02, 2007
    Location
    long island!!
    Posts
    134
    Specs:
    macbook 2.16ghz,2 gigs ram, 120gigs--ipod nano red 4 gig--ipod vid 30 gig black-- rip macbook
    is it a ac adaptor hd? also check your apps that are runing casue more apps could be runing then you think

  3. #3


    Member Since
    Aug 08, 2006
    Posts
    84
    nope, the hd is internal. there were no apps on my dock running other than those two. my activity monitor showed nothing out of the ordinary, and i "train" my battery once every month or two.

  4. #4

    PerryLynch's Avatar
    Member Since
    Sep 24, 2007
    Posts
    235
    Specs:
    17" MacBook Pro 4GB
    If I read your question correctly, you also changed your hard drive out? A 250 GB drive may have very different power requirements than an 80 GB drive.
    Perry M Lynch, CISSP CISA
    Mac Newbie, Security not-so-newbie

  5. #5

    DigitalN.'s Avatar
    Member Since
    Oct 17, 2007
    Posts
    46
    size of a drive does not change how much power it uses, in fact a newer drive might even use less power, the only change would be if he had went from a 5400RPm to a 7200RPM drive, which it being a 250, he stuck with 5400, or even 4200.

  6. #6

    kkelly122's Avatar
    Member Since
    Jul 24, 2006
    Location
    Long Beach Island, NJ
    Posts
    666
    Specs:
    MBP l iPhone l iPod
    have you calibrated it lately? run on battery power until it forces the machine to sleep. wait until the light on the lid release button runs out (may take a long time so you might want to do it over night). once the light is out charge all the way. you can use it during the charing. this may help, i had the same problem you had and it helped my battery life. if you haven't ran the battery update in software update you might want to do that also.

  7. #7


    Member Since
    Feb 19, 2007
    Location
    Atlanta
    Posts
    350
    Specs:
    15" MBP 2.2Ghz C2D 4GB RAM 120GB HDD
    Not really related to your problem, but this little app gives you some handy battery info: http://www.coconut-flavour.com/coconutbattery/
    Apple Mac HQ - Apple/Mac News, Reviews, and More

  8. #8

    PerryLynch's Avatar
    Member Since
    Sep 24, 2007
    Posts
    235
    Specs:
    17" MacBook Pro 4GB
    Quote Originally Posted by DigitalN. View Post
    size of a drive does not change how much power it uses, in fact a newer drive might even use less power, the only change would be if he had went from a 5400RPm to a 7200RPM drive, which it being a 250, he stuck with 5400, or even 4200.
    Well, here's where some simple math & research will help:

    A WD 250 GB 5400 RPM SATA notebook drive uses 2.0 WATTS of power, at idle.
    A Fujitsu 80 GB 5400 RPM SATA notebook drive uses .65 WATTS of power, at idle.

    And with higher wattage comes higher heat load. Of course, the under load rates are 2.5 and 1.9 W, so either way you are using more power. Thus more fan use, and more battery drain.

    Source: http://www.westerndigital.com/en/pro...sp?DriveID=314
    Source: http://www.fujitsu.com/global/servic...h-catalog.html
    Perry M Lynch, CISSP CISA
    Mac Newbie, Security not-so-newbie

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Price estimate for selling MBP...???
    By Decepticon_GTR in forum Apple Notebooks
    Replies: 4
    Last Post: 01-11-2014, 09:30 PM
  2. can I get a cost estimate for . . .
    By purple in forum Apple Notebooks
    Replies: 1
    Last Post: 03-22-2011, 09:21 PM
  3. Need an estimate- replacing internal drive
    By Finoewae in forum Other Hardware and Peripherals
    Replies: 2
    Last Post: 03-19-2010, 10:53 AM
  4. Repaired without estimate-What to do?
    By zedmate in forum Apple Notebooks
    Replies: 5
    Last Post: 02-09-2008, 12:12 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •