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HT1338: OS X: Updating OS X and Mac App Store apps

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HT1338 Battery health is decreasing extremely quickly

286 Views 6 Replies Latest reply: Nov 19, 2012 2:42 AM by thuctrinh RSS
thuctrinh Calculating status...
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Nov 17, 2012 7:58 PM

I bought my Macbook pro last July, and i have been charging for 92 times, but my battery health right now is only 21%. I just don't understand why my battery health is decreasing quickly like that

MacBook Pro, OS X Mountain Lion (10.8.2)
  • etresoft Level 7 Level 7 (23,905 points)

    How do you define "battery health"? Mac users seem obsessed with monitoring tools so look for things going wrong. How long does your machine last on a charge? If it doesn't last as long as it should, then take it in to the store.

  • softwater Level 5 Level 5 (5,370 points)

    This is a hardware fault. If you only bought it in july take it back to the shop for replacement under warranty.

  • ScratchSF Calculating status...

    I'm making a huge assumption here, since you don't say it, which is that you've upgraded to OS X ML (10.8.x).  There's a 189 page thread on the ML battery issues here: https://discussions.apple.com/thread/4135250?start=2820&tstart=0

     

    The bottom line is that some people have problems and others aren't  Some people see improvement on 10.8.1 or 10.8.2, and others don't.

     

    Personally, in 1 year of having my MBP, my battery health was always about 100% (actually 102%).  Not, it's dropped to 98%, or 4%, in just a few months (and only a few cycles) with ML.  So, as I'm typing, I'm actually redownloading Lion and am going to keep my fingers crossed that the downgrade takes care of it.

     

    In your case, if you're at 21% of battery health, take it to an Apple store and talk them into replacing your battery.  And if you are on ML, you might want to consider moving back to SL or Lion until if/when Apple takes care of this.

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