Macbook loss of battery life after HD upgrade

Discussion in 'MacBook Pro' started by 45cdorm, Dec 15, 2009.

  1. 45cdorm macrumors newbie

    Joined:
    Dec 15, 2009
    #1
    Hi guys!

    I have a 2 month old macbook pro that came with a 160gb hard drive i had a wopping 6.5hrs of battery life I have recently upgraded my hd to a 500gb SAMSUNG HM500JI and now at maximum charge i only get 3hrs battery life....

    Has anyone had this problem? is this normal?

    Let me know please.
     
  2. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #2
    Some hard drives require more power than others. You have calibrated your battery, right?
     
  3. 45cdorm thread starter macrumors newbie

    Joined:
    Dec 15, 2009
    #3
    I find it strange cos on the reviews for this HD they say it increases battery life.....

    Calibrate my battery? im new to mac but loving so I didnt know you could do this, how can I do it?
     
  4. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #4
    Click the link I provided. Also, more reading on batteries here.
     
  5. 45cdorm thread starter macrumors newbie

    Joined:
    Dec 15, 2009
  6. 45cdorm thread starter macrumors newbie

    Joined:
    Dec 15, 2009
    #6
    I tried this and it has helped a great deal.....when i fully calibrated it it said i had 6.5hrs of battery time but it oscilates a great deal during use...is this normal? for the last hrs its been saying 2hrs...then 2.35hrs then 2.45hrs. then 2hrs heheh......quite frustrating when ur trying to find out if there is a problem with the battery etc.

    Thanks for your input.
     
  7. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #7
    Yes, it's perfectly normal. Your battery meter shows the remaining time, based on the current load on the battery. As the load changes, so does the estimated time remaining. Remember, it's only an estimate, not an exact value. Calibrating every month or so will keep it as accurate as possible.
     
  8. Sweetfeld28 macrumors 65816

    Sweetfeld28

    Joined:
    Feb 10, 2003
    Location:
    Buckeye Country, O-H
    #8
    Was there a difference in RPMs? Going from say a 5400rpm, to a 7200rpm drive would also cause this.
     
  9. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #9
    Not in all cases. Some 7200 drives consume less power than some 5400 drives.
     
  10. BlizzardBomb macrumors 68030

    BlizzardBomb

    Joined:
    Jun 15, 2005
    Location:
    England
    #10
    The 160 GB hard drive you had before would have almost certainly been single platter. Your shiny new 500 GB hard drive definitely has 2 platters in it. Therefore they'll be a noticeable increase in power usage, although probably not to the extent you're reporting.
     

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