Currently getting 16-20 hour battery life...

Discussion in 'MacBook Pro' started by andyACEcandy, Dec 8, 2013.

  1. andyACEcandy macrumors 6502a

    Feb 11, 2008
    Is this normal? Surfing web and even had a couple youtube music videos playing...

    Late 2013 rMBP 13". I'm monitoring it now but so far, this cycle is on pace for 16+ hours! :eek:

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  2. iKrivetko macrumors 6502a

    May 28, 2010
  3. Leisyu macrumors member

    Nov 27, 2013
  4. raptor402 macrumors 6502

    Jun 30, 2011
    Is it just the estimated time or are you actually getting 16 hours out of it?

  5. dusk007 macrumors 68040


    Dec 5, 2009
    The chipset of the 13" can drop power consumption as low as the Air but it has a much larger battery. If it wasn't for the display it could run long.
    Notebookcheck reported a min power draw of 2.8W with the display turn all the way down (wifi off). That would result in 25h battery life. But that only happens if the everything is asleep and nothing happens. Normal idle was 8-9 W so about three times that.
    If you drop display brightness enough and don't do much 16h is probably possible. But you'd really have to read text for hours in a dark enough environment. If you don't do much, the display is the biggest power source by far.

    It is basically the same CPU that is in the Air, that Intel wants to sell for tablets, just with a higher max TDP. If you use it for 1h under full load, you will be at around 40% battery life left. Put some load to it and it is dry in no time.
  6. lumenz macrumors newbie

    Nov 11, 2013
    so if the mbp retina 13 inch of late 2013 has a higher TDP , does that means the whole macbook is running cooler than the macbook air 11 inch base model of mid 2013 ?
  7. dusk007 macrumors 68040


    Dec 5, 2009
    Assuming the same load, I would assume so yes. A cooling system that can handle up to 28W TDP will probably need less effort for equal load.

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