Does having auto brightness off hurt your battery life?

Discussion in 'iPhone' started by The Game 161, Mar 21, 2011.

  1. The Game 161 macrumors P6

    The Game 161

    Dec 15, 2010
    Seems since I went to 50% with auto brightness off battery life is going quick. 74% with 1 hour 15 minutes usage and 10 hours standby
  2. junkiepilot macrumors newbie

    Mar 12, 2011
    Quote from iPhone Manual:

    "Screen brightness affects battery life. Dim the screen to extend the time before you
    need to recharge iPhone, or use Auto-Brightness.
    Adjust the screen brightness: Choose Brightness and drag the slider.
    Set whether iPhone adjusts screen brightness automatically: Choose Brightness
    and turn Auto-Brightness on or off. If Auto-Brightness is on, iPhone adjusts the screen
    brightness for current light conditions using the built-in ambient light sensor."
  3. maflynn Moderator


    Staff Member

    May 3, 2009
    Personally, I turn off auto-brightness. Not to save the battery, it just bugs me when the screen goes dim or bright on its own. I prefer a single setting.
  4. The Game 161 thread starter macrumors P6

    The Game 161

    Dec 15, 2010
    My current settings are

    50-55% brightness

    Auto brightness off

    30% battery life

    3 hours, 56 minutes usage

    1 day, 10 hours standby

    is this normal? would i be getting more battery life if the auto brightness was on?
  5. gouda272 macrumors regular

    Feb 20, 2010
    I keep my brightness down to about 25-35%. I am jailbroken and have an app that turns the quicklaunch volume control into a brightness control so if I'm outside and need to increase the brightness it is very quick and easy to do so. I bet if you were to drop your brightness down you would get much better battery life.
  6. Rodimus Prime macrumors G4

    Rodimus Prime

    Oct 9, 2006
    chances are yes you would. The amount of power it takes for auto brightness to run is next to nothing.
    If the sensor is what I believe it is then it is nothing more than a resistor that decrease resistant with light. Those were used in some kids toys in the 60's so clearly they have to of gotten cheaper since then.
    That being side Apple Auto brightness controls are pretty poor compared to others and even the others are not that good.
  7. Kwill macrumors 68000


    Mar 10, 2003
    Can't comment specifically on condition/age of your battery however other settings affect how long the iPhone holds a charge: Wi-Fi, BlueTooth, Fetch/Push calendar, contact and email data.

    12 Tips to Extend iPhone Battery Life
  8. xAnthony macrumors 65816


    Mar 2, 2010
    Well this is mine..

    What are you doing during your 3 hours and 56 minutes? A lot of streaming and games? Or is that just normal usage?

    Attached Files:

Share This Page