MacBook Air drains fast while in sleep

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MacBook Air drains fast while in sleep

I've noticed that the battery on my 2012 MacBook Air seems to drain way too quickly while in sleep. When using the computer, it seems to drain normally but while asleep, it drains too fast. For example, I'll charge the battery to where its 100% and then unplug it while it still sleeps. Twelve hours later, I'll wake the computer and the battery has drained down to 81%. I've checked all the usual stuff...power nap off, nothing connected, etc. I took it to the Genius Bar and they ran a diagnostic test on the battery that reutrned normal. They reset the SMC but no change. I think something has got to be wrong as the battery shoud in no way drain 19% while in sleep, doing nothing...in less than 24 hours.

Any ideas?

MacBook Air, OS X Mountain Lion (10.8.2)

Posted on Nov 19, 2012 4:24 PM

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Answer 1

Sep 6, 2013 6:17 PM in response to Brian I.

Hi Brian,

Any chance you have update since then?

I have the exact the same problem.

Even the battery drain is about the same much, about 1.5% per hour.

I did everything I could and sent to Apple genius and was told the battery status was OK.

They said might be software conflicts so I erased my parttition and re-installed ML but still no go.

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