How much does screen brightness affects battery life?

Discussion in 'iPhone' started by HarryPot, Sep 24, 2010.

  1. HarryPot macrumors 6502a

    Joined:
    Sep 5, 2009
    #1
    I really like having my iPhone between 80-90% of screen brightness, but I'm concerned about battery life.

    How much battery life difference are we talking about between using the iPhone at 50% or at 90%, approximately?
     
  2. samcraig macrumors P6

    Joined:
    Jun 22, 2009
    #2
    80-90? WOW. That just about burns my retinas. I have mine at 35-40 percent and consider it PLENTY bright...
     
  3. mpossoff macrumors 68020

    Joined:
    Mar 21, 2010
    Location:
    Philadelphia
    #3
    Apple at genius bar said to keep brightness a hair below 50% cause screen brightness is a battery killer.

    Marc
     
  4. HarryPot thread starter macrumors 6502a

    Joined:
    Sep 5, 2009
    #4
    :)

    I can perfectly read at 35-40%, but at 80-90% I simply enjoy it more.

    So I have heard, but I have never seen any actual numbers. I guess I'll have to make some benchmarks myself. Problem is, I don't see myself with much time to make them.:eek:
     
  5. IrishVixen macrumors 68020

    IrishVixen

    Joined:
    Jun 20, 2010
    #5
    Screen brightness at or near full is the single largest battery hog on my phone, worse than push or weak 3G signals. The only time I leave my screen anywhere near full brightness is when I'm outside--most typically in the car. With the iPod app playing and Bluetooth on, I can literally watch the battery drop by 1% every 2-3 minutes or so--it's bad enough that I've gotten into the habit of plugging the phone in as soon as I get into the car unless it's a really short drive. Using the iPod app and Bluetooth indoors, with the screen around 30%, it takes a lot longer to see a measurable dip in battery life.
     
  6. Resist macrumors 68030

    Joined:
    Jan 15, 2008
    #6
    While this is true, 50% is not enough for normal use during the day...at least not for me.
     
  7. -aggie- macrumors P6

    -aggie-

    Joined:
    Jun 19, 2009
    Location:
    Where bunnies are welcome.
    #7
    If you want to know the answer to this, OP, just test your battery life at 100% and see how long it takes to go down a few % and then do the same for 50%
     
  8. rk1991 macrumors regular

    Joined:
    Dec 10, 2009
    #8
    why dont you just leave it at fifty and use auto brightness..i feel that helps quite a bit.
     
  9. slayer41 macrumors newbie

    Joined:
    Aug 1, 2010
    #9
    I keep mine right under the second s in brightness. And I have auto bridghtness on. I easily can go a whole day without charging my battery.
     
  10. ucfgrad93 macrumors P6

    ucfgrad93

    Joined:
    Aug 17, 2007
    Location:
    Colorado
    #10
    I keep mine around 75% and usually don't have a problem lasting an entire day.
     

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