How Much Battery Life Do You Get From 15" MBP?

Discussion in 'MacBook Pro' started by anirban, Feb 1, 2008.

?

How Much Battery Life?

  1. Less Than 2 Hours

    6 vote(s)
    10.5%
  2. Between 2 and 3 Hours

    14 vote(s)
    24.6%
  3. Between 3 and 4 Hours

    28 vote(s)
    49.1%
  4. Over 4 Hours

    9 vote(s)
    15.8%
  1. anirban macrumors 6502a

    anirban

    Joined:
    Jan 9, 2007
    Location:
    Houston, TX
    #1
    I purchased my 15", 2.4GHz SR MBP on June 2007. Since then on, I barely get over 2hrs of battery life. I have calibrated the battery several times.

    I get far less battery time if I am using bluetooth, wi-fi, and internal speakers.

    So I just wanted to see if anyone is getting anything close to the advertised 6 hours of battery life. Also, it would be helpful if you could post the conditions under which you clocked the battery time (such as state of wifi, bluetooth, brightness, charge cycles, etc.)

    Thanks!

    EDIT: My battery has 56 cycles.
     
  2. siurpeeman macrumors 603

    siurpeeman

    Joined:
    Dec 2, 2006
    Location:
    the OC
    #2
    whenever i'm on battery power, brightness is down to less than half, wifi is on and bluetooth is off. volume is down to about a quarter, and i get roughly 3.5 hours of use.
     
  3. anirban thread starter macrumors 6502a

    anirban

    Joined:
    Jan 9, 2007
    Location:
    Houston, TX
    #3
    Dang, there are people getting over 4 hours of battery life?

    I am beginning to suspect that my battery might be faulty...
     
  4. CJRhoades macrumors 6502

    Joined:
    Dec 4, 2007
    Location:
    Lafayette, IN
    #4
    My 17" gets just over 2 hours. It has 89 cycles. My TiBook get just under 2 hours and it has 331 cycles... Hmm... I don't think that's right. Could system profiler be wrong?
     
  5. DJAKO macrumors 6502a

    Joined:
    Sep 8, 2006
    Location:
    Michigan
    #5
    Battery life depends on too many things, are you watching a movie, are you just making a word document, what is your brightness at? There are too many factors that can have an influence.
     
  6. mankar4 macrumors 6502a

    mankar4

    Joined:
    Aug 23, 2007
    Location:
    USA
    #6
    I have a 2.2 sr mbp i got in august 2007. just unplugged it at 100% and it says 4:36, with music on and airport on. How do find out the cycles?
     
  7. OllyW Moderator

    OllyW

    Staff Member

    Joined:
    Oct 11, 2005
    Location:
    The Black Country, England
    #7
    Until yesterday I was only getting about 30 minutes, but with my AppleCare replacement I'm now back up to around 3.5 hours. :)

    15" 1.83 Core Duo set at 50% screen brightness, 20% keyboard backlight (in low light), bluetooth off, wi-fi on, 2 charge cycles - 3rd battery from new :eek:
     
  8. macRat17 macrumors member

    macRat17

    Joined:
    Dec 27, 2007
    #8
    battery health 95% 22 cycles.
    With screen at 50% brightness, keyboard lights off, bt off, while surfing and word processing i get abt 4 hrs.
     
  9. a4abt macrumors regular

    Joined:
    Jan 14, 2008
    Location:
    Miami
    #9
    I'm getting ~3.5 hours doing Internet and school stuff (PowerPoint, Word, Excel)
     
  10. tjcampbell macrumors 6502a

    tjcampbell

    Joined:
    Aug 14, 2006
    Location:
    Vancouver
    #10
    Wirelessly posted (Mozilla/5.0 (iPhone; U; CPU like Mac OS X; en) AppleWebKit/420.1 (KHTML, like Gecko) Version/3.0 Mobile/4A93 Safari/419.3)

    Depends on the resolution of the porn.
     
  11. XTRanger macrumors member

    Joined:
    Jun 24, 2007
    #11
    but ppl dont usually need more than 600kb of it...:p
     
  12. KingYaba macrumors 68040

    KingYaba

    Joined:
    Aug 7, 2005
    Location:
    Up the irons
    #12
    Purchased September of 2007.

    When running on battery I get 4+ hrs. Always have blutooth turned off and brightness is down almost all the way. Usually typing in Office, Camino, iChat and the Mail application when on battery power (95% of the time). Then I'll leave myself a sticky note when I put it to sleep.

    Keyboard lights are never on when using the battery.

    The other 5% is when I have to boot up XP using Vmware and the battery life will instantly cut in half to 2+ hrs.
     

    Attached Files:

  13. Tom McMahon macrumors member

    Joined:
    Aug 1, 2007
    Location:
    Orlando, Florida
    #13
    Brightness @ 50%
    BT off
    Wifi off (yes I actually use a cable)
    Speakers @ 50%

    Internet, e-mail, iTunes etc.... over 3 1/2, very close to 4 hours. Battery has been cycled over 90 times.
     
  14. kkanuck macrumors newbie

    kkanuck

    Joined:
    Jan 31, 2008
  15. Tilpots macrumors 601

    Tilpots

    Joined:
    Apr 19, 2006
    Location:
    Carolina Beach, NC
    #15
    A cycle occurs once your battery drops below a certain percentage, and then is charged back up again. Not sure of the exact percentages. There's more about this on Apple's site if you search for it.
     
  16. torpy macrumors regular

    Joined:
    Jul 28, 2007
    Location:
    Sydney + Los Angeles
    #16
    Brand new battery (replaced under warranty), I can get about 4.5hrs if all I'm doing is browsing the web. (i.e. static text, not flash)
     
  17. marclapierre13 macrumors 6502a

    marclapierre13

    Joined:
    Jul 7, 2005
    #17
    I NEVER ever ever have gotten 6 hours ,even when it was brand new.
    I get about 3 hours when I am running bluetooth and wireless internet, and 4 hours if i am not using anything.
    1.5 hours gaming.
     
  18. triddent222 macrumors regular

    Joined:
    Jul 27, 2007
    Location:
    Somewhere interesting
    #18
    93% Health (Quite low, may get an Apple Genius to exchange for a new one next time I find myself in an Apple Store).

    I usually get around 3:30 hours, WiFi on, BlueTooth off, 50% brightness, keyboard backlight on.

    I was quite pleased about a week ago when I got about 2 hours, playing The Matrix full screen on an external monitor (1680x1050), about 5 more movies (playing on the internal monitor, audio off), iTunes playing with the sound off, and Transmission downloading at 150Kb/s (crappy Internet aside...). All for the sake of a battery life test :D.
     
  19. forafireescape macrumors 6502a

    forafireescape

    Joined:
    Jan 16, 2008
    Location:
    NJ
    #19
    You can look on the About This Mac thing and scroll down to battery, or just download Coconut...it's a great app.
     
  20. Shannighan macrumors 6502a

    Shannighan

    Joined:
    Jul 26, 2007
    Location:
    Buffalo, NY
    #20
    you have to remember that that 6 hours is when the laptop monitor is either all the way down (brightness) or off, your wifi, bt, rf, w.e off. keyboard blacklight off, nothing in the super drive, and its just sitting there.

    thats when you get 6 hours. but since thats not realistic, your not going to get that.
     
  21. marclapierre13 macrumors 6502a

    marclapierre13

    Joined:
    Jul 7, 2005
    #21
    I generally always have my backlit keyboard on, and the brightness at near max. Unless its dark in the room, ill turn it down, or if im trying to conserve battery power, because I look at the battery meter and it says less than 1 hour left, and I go "Oh crap!":p
     

Share This Page