Does the backlit keyboard drain battery life?

Discussion in 'MacBook Air' started by Sinnthetic, Jul 20, 2011.

  1. Sinnthetic macrumors member

    Jun 12, 2011
    I'm assuming thats why the 11 inch is getting lower battery ratings.

    Is there a way to turn it off by chance?
  2. simsaladimbamba

    Nov 28, 2010
  3. miles01110 macrumors Core


    Jul 24, 2006
    The Ivory Tower (I'm not coming down)
    The backlit keyboard is a very small factor in battery life. The 11" model's battery life is shorter because it is a physically smaller battery.
  4. GGJstudios macrumors Westmere


    May 16, 2008
    The backlight doesn't affect battery life as much as other factors, like screen brightness and other apps you're running. This should answer most, if not all, of your battery questions:

    System Preferences > Keyboard > Illuminate keyboard in low light conditions (uncheck)
  5. shurcooL macrumors 6502a

    Jan 24, 2011
    Don't use it when you don't need it, and it won't use up _ANY_ battery life.

    When you do need it, it'll allow you to use your notebook, which you wouldn't have been able to without it and any extra battery life would've been useless anyway.
  6. krogers34 macrumors member

    Jul 17, 2008
    I don't see the need for a backlit keyboard besides it being cool, which it is. One, you should know where all the keys are and two if you really need to know where something is your screen gives of light and you can use that easily so the post above, there is never a time you would not be able to use your computer because it is too dark, haha.
  7. Gemütlichkeit macrumors 65816


    Nov 17, 2010
    I never use it while on battery

    But it is a good additive when plugged in, in bed at night :D

    I thought I wasn't going to use it ever (I never used my 2008 MBP backlit keys) but with the black keys it's a must. If they made the keys white or silver the backlit keys wouldn't be necessary I feel.
  8. jvmxtra macrumors 65816


    Sep 21, 2010
    f it.. just looks SO much better.. use it.. it will use like less than 0.1% battery
  9. AuroraProject macrumors 65816


    Feb 19, 2008
    Right there
    Wirelessly posted (iPhone 4: Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_3_5 like Mac OS X; en-us) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8L1 Safari/6533.18.5)

    Anything that uses power will lessen battery life.
  10. kp416 macrumors newbie

    Oct 5, 2011
    Is there a way to auto sense when it is dark to turn on the keyboard?
  11. LordJim macrumors newbie

    Sep 16, 2011
    ^It does that by default if I'm not mistaken.
  12. mrsir2009 macrumors 604


    Sep 17, 2009
    Melbourne, Australia
    The 13" MBA has a backlit keyboard too, so I don't get why it would make the battery rating lower ... If you wanna save power turn the backlit keyboard off.
  13. solo118 macrumors 65816

    May 16, 2011
    Yes, it is on by default. It is best to leave it on auto (just like the iPhones auto screen brightness setting)

    I have a feeling that if you put it on 10 second intervals (or whatever) it may waste more battery life by turning it on and off so many times. I could be totally wrong there, but its just an idea.
  14. duky macrumors 6502

    Jun 25, 2007
    North Carolina
    I've found that it gives me about 20 min less in battery life
  15. Invisible Elf macrumors member

    Jan 16, 2011
    Should be really easy to find out exactly how much it's going to drain, if we could just find the wattage of the LEDs it uses?
  16. thetruth1985 macrumors 6502

    Sep 17, 2010
    I'm so happy I found this thread. Now I understand why turning on the lights at home raises my energy bill!
  17. SteveKnobs macrumors 6502

    Jun 23, 2010
    Hilarious. Dry, sarcastic humor like this is the best.
  18. mrsir2009 macrumors 604


    Sep 17, 2009
    Melbourne, Australia
    ...And how many LEDs there are in the keyboard...

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