Currently Being ModeratedJun 29, 2013 3:07 AM (in response to noname14)
I have good news. I left my macbook air on (disabled sleep mode), with automatic brightness, no programs running so that I could time the fully charged battery life. it got exactly 5 hours of battery life before it died. after it died i let it sit there for a few hours.
then i plugged it back in, without turning it on, until it was fully charged and the light was green. when i finally turned it on, the battery meter said I had 13 hours of battery life left. this was higher than anything i had ever seen before.
thinking it was a fluke, i left it on again (disabled sleep, no program etc), and after 5 hours of sitting on, it still had 65% battery life left! i'm not sure what happened here. i assume the battery was recallibrated (even though i have been numerous times that macbook airs come pre-callibrated and that this would be a waste of time).
Needless to say, I am extremely satisfied that I found the solution to this dilemma. If anyone else is having a similar problem I suggest you do what I did. I wish someone from apple supprort would have told me to do this. Clearing the p-ram did nothing. turning it off and restarting did nothing. I had to let the battery fully deplete, sit for a few hours, then charge it completely before turning it on.
Currently Being ModeratedJun 29, 2013 6:07 AM (in response to noname14)
Currently Being ModeratedJul 3, 2013 9:29 AM (in response to Hyper7Death)
I am not positive, however...
I believe that a 12 hour, or greater, battery life would come from using the LCD's LED lighting on the lowest level possible, keyboard lightint as dim as possible and all sorts of "limited" things.
My new MacBook Air arrived on Monday, July 1st, 2013 I didn't bother charging it, as it was fully charged still; 97%.
I used it on Tuesday, at work, for around 7 hours, Tuesday evening at home, 2 hours and am using it now, 1 hour and some change, to post this very message, and I have 18% battery life remaining. I have a reading of 2 hours and 47 minutes of battery life remaining. These are esitames made by the core system and based on current use and other factors.
Apple is right in stating "Around 12 hours", its not an assumption or a given, its just an estimate.
Bring on the Mavericks! We're ready... iOS 7 too...
Currently Being ModeratedJul 28, 2013 12:02 AM (in response to LowLuster)
Hi LowLuster. You seem to have a lot of knowledge about the battery of MacBook Air. I just got the latest MacBook Air this week. And after reading your comments I chose not to calibrate it. But what should I do in the future? I went to this site http://www.apple.com/batteries/notebooks.html and added the calender reminder. How should I calibrate my battery when the calender says it`s time? Reading your comments I see I shouldn`t run it to zero percent, so how am I supposed to do this? Does running it to 10-20% and then recharging it to 100% qualify as a calibration? Should I follow Tom Nelsons calibration advise: http://macs.about.com/od/usingyourmac/qt/battery-calibration.htm
Or doesn`t the new Macbook need any calibration at all?
I would be really thankful if you could give me some advise! :-)
Currently Being ModeratedJul 28, 2013 3:22 AM (in response to LowLuster)
Okay, I see. Thank you. The thing that confuses me about the calibration issue with the Macbook Air (Mid 2013) is the text I`ve underlined below from Apples page and where they are talking about lithium-based batteries:
For proper maintenance of a lithium-based battery, it’s important to keep the electrons in it moving occasionally. Apple does not recommend leaving your portable plugged in all the time. An ideal use would be a commuter who uses her notebook on the train, then plugs it in at the office to charge. This keeps the battery juices flowing. If on the other hand, you use a desktop computer at work, and save a notebook for infrequent travel, Apple recommends charging and discharging its battery at least once per month. Need a reminder? Add an event to your desktop’s iCal. When your battery no longer holds sufficient charge to meet your needs, you may choose to replace it. If your notebook came with a built-in battery, you should have the battery replaced only by an Apple Authorized Service Provider."
So when Apple is talking about discharging, how should I actually discharge it? If discharging a lithium-based battery completely is harmful for the battery life, then what is the ideal way to do this without harming the battery?
Currently Being ModeratedJul 28, 2013 4:22 AM (in response to LowLuster)
I`m new to this forum, but now I`ve made a new thread. Thank you :-)
Currently Being ModeratedJul 30, 2013 6:16 AM (in response to PlotinusVeritas)
I understand what you posted, but, 30% less battery is just TOO MUCH to lose. Some times my MBA shows less than 6 hours.
The advertise, even with the small letters, whas about the "Macbook Air 13"...
Currently Being ModeratedAug 18, 2013 7:42 PM (in response to Hyper7Death)
Currently Being ModeratedAug 31, 2013 8:28 PM (in response to Hyper7Death)
I have the 2013 Macbook Air i7 with 8GB RAM and 256 hard drive. It's getting great battery life. More than 12 hours. Someone in the forum said the i7 could not ever get even close to 12 hours. Mine does and I have been thoroughly impressed with it since getting it in June 2013. As you can see from the screen shot below, I have about 84% battery life left which will last 10:55 more hours. I keep the brightness level at about 1 notch below 50%.
Currently Being ModeratedOct 14, 2013 10:53 AM (in response to Hyper7Death)
folks, im having a similar problem with the battery! earlier it used to work great but since a few days what has happened is that the remaining battery keeps fluctuating it says 20:00hours on full charge and by 98%it goes to 15hours and 90% sometimes 11:30 houurs or 12:00 hours sometimes it also increases. i tried reinstalling the OS. do you think my battery is faulty