Battery life - Just to make sure

Discussion in 'MacBook Air' started by alexis0070, Aug 21, 2013.

  1. alexis0070 macrumors newbie

    Aug 16, 2013
    Hello, i5/8/128 13" haswell here, I just want to make sure that my battery life is good. The air says that I am having 15 hours, after that 6 hrs and then 8. I know that it differs minute by minute. Is there an application or a program that counts the battery life? thanks in advance and sorry for my English.:)
  2. GGJstudios macrumors Westmere


    May 16, 2008
    There are many factors that impact your battery life, and the time remaining is only a rough estimate, based on the current power demands at any point in time. It will change constantly from minute to minute as your workload changes, and is not completely accurate.

    See the BATTERY LIFE FROM A CHARGE section of the following link for details, including tips on how to maximize your battery life.
    The link below should answer most, if not all, of your battery/charging questions. If you haven't already done so, I highly recommend you take the time to read it.
  3. AlexNapo macrumors newbie

    Jul 24, 2013
    Battery usage indicator?

    I was about to post a new thread regarding this concern about battery usage. Most of the apps let us know only about the remaining time not how long the battery has been used by various processes.
    Is there any app available at app store(Paid/Free) to indicate the battery used?:confused: Just like we have in the Mobiles!
  4. GGJstudios macrumors Westmere


    May 16, 2008
    AFAIK, there is no such app for OS X.
  5. ItHurtsWhenIP macrumors 6502

    Aug 20, 2013
    What about just leaving the percentage showing next to the battery indicator?

    That at least tells you something that's not minute to minute..
  6. DisplacedMic macrumors 65816

    May 1, 2009
    that's exactly what I do.

    Also, I'm not sure what OP is looking for isn't a bit of a rabbit hole. In reality YOU are the best gauge of what your battery life is going to be.

    Give it time and you'll get used to what 100%, 75%, 50% and all the way down to the red means for you in terms of "how much time i have left"

    the battery on my 2009 MB sucks now...well, it's awesome considering its age, but it's crazy short. So I know exactly what 40% will give me based on what i'm planning on doing. I get about 1% a minute tops and MAYBE half that if i'm watching a video or something similar.

    For my Air I could start watching Lawrence of Arabia with 40% battery left and still be ok :D
  7. GGJstudios macrumors Westmere


    May 16, 2008
    Yes, but could you finish it?! :D
  8. DisplacedMic macrumors 65816

    May 1, 2009
    ha, well played
    even plugged in i'm not sure i have the attention span for that movie anymore...
    (definitely a good one though:p)
  9. Mrbobb macrumors 601

    Aug 27, 2012
    That's what I do. Percentage Only.

    Showing time left, for whatever reason, makes me stressful.

    But honestly folks, with the Haswell, it should give u the freedom to be obsession-free about your battery.
  10. jadAce macrumors regular


    Aug 10, 2013
    I was somewhat confused when I purchased the new MacBook Air. Switching from a Windows laptop with about 1.5 hours of battery life, I was surprised the MBA 13 was showing 7 or 8 hours on full charge (great improvement, but still, not near the 12 hours claimed). However, it lasted for about 13 hours on full charge.

    As others have said, just go with the percentage indicated (not time) for a more accurate estimate.
  11. gnasher729 macrumors P6


    Nov 25, 2005
    Asking how many hours your battery lasts is like asking how many hours your car can drive with its current fuel. It depends on how fast you go.
  12. Acorn macrumors 68020


    Jan 2, 2009
    my 2010 macbook pro used to say 14 hours battery life under light usage. this is obviously not true. the battery life in 2010 was not remotely as good as it is now. I think I would get maybe 5 hours out of it real usage. the best thing to do is charge it to max, turn bluetooth off, turn brightness as low as you can tolerate it then just surf the web or whatever keeping real time until it dies. screw what the meter says.
  13. alexis0070 thread starter macrumors newbie

    Aug 16, 2013
    Thank you all. I checked the activity monitor and it says that SystemUIServer has 5-10% usage. Also the spotlight is working too often (I thing it's indexing). So that's why I am not sure about the battery life! :) I know it's not a big problem
  14. Saturn1217 macrumors 6502a

    Apr 28, 2008
    It would be nice to have a macbook equivalent of screen on time like in the cell phone world. That way everyone could provide accurate battery life as opposed to the crazy estimates the battery icon gives.

    I've only had my 2013 MBA for a day so far (i7/8gb/256 - 13") but so far so good. I unplugged it last night used it for about 30min before I went to bed. I haven't plugged it back in since. Took it to work today. I wasn't constantly at my computer but whenever I sat down at my desk I was using it. Wifi always on, mostly browsing and word documents but I also had to run virtualbox a lot for some job specific excel macros. Also took it to lunch to test wifi in more places. And now I am home browsing and generally dicking around. Still have 45% battery left. I only left it unplugged because I was curious (and not really expecting much because at work I didn't want to be worried about preserving battery life and I have a charger at my desk anyway). I thought I'd be able to run it down in a normal day but I may need to rethink this :D

    For some reason my keyboard also feels a bit better than my 2012 MBA but otherwise they might as well be the same computer which is exactly what I wanted, my computer + more battery life.
  15. Mrbobb macrumors 601

    Aug 27, 2012
    Not even.

    Is like those fancy cars that have displays that give you all kind of information, like 200 miles before fuel runs out. It's a GUESSTIMATE based on PAST's averages. It doesn't know what you are going to do in the future.

    Do not think the battery meter is a precise atomic-clock-like instrument, it is a more or less give it or take 1-3 cups of salt.

    Your new battery says it has <10 charge cycles, 98%+ health, ur good. Next REAL problem.

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