HT1338: OS X: Updating OS X and Mac App Store appsLearn about OS X: Updating OS X and Mac App Store apps
Currently Being ModeratedNov 17, 2012 9:17 PM (in response to thuctrinh)
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.
Currently Being ModeratedNov 18, 2012 3:39 AM (in response to etresoft)
Before, it lasted for 3 hours or more, but now only 1 hour. The last month i checked with iStat pro, it said the battery health was 90% with 72 cycles count. So i'm kind of worried about my Mac's battery. And btw, why did you ask that how do I define "battery health" ? I'm not sure about the definition though, the only thing i know is now my battery's condition is "Service battery", which means that i need to get it fixed. I just don't know what had happened to my machine's battery.
Anyway, thank you for your reply
Currently Being ModeratedNov 18, 2012 3:42 AM (in response to thuctrinh)
This is a hardware fault. If you only bought it in july take it back to the shop for replacement under warranty.
Currently Being ModeratedNov 18, 2012 6:54 AM (in response to softwater)
i'm afraid i can't take it to the shop for replacement under warranty anymore, my one-year warranty is out of date
Currently Being ModeratedNov 18, 2012 10:14 AM (in response to thuctrinh)
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.
Currently Being ModeratedNov 19, 2012 2:42 AM (in response to ScratchSF)
Thanks a lot for those information, it's really helpful. I brought my mac to the authorised service center today but they didn't help much, they couldn't answer why i have this problem. they just told me to replace the battery. i didn't notice about the ML until you brought it up, i just got my Mac updated to ML the beginning of Nov, and before it was 89% or 90% of battery health for 72 cycles. So i guess the main problem must be because of ML. Anw, i need to pay like 185$ (165$ for the brand new battery and 25$ for the replacement fee), which is not nice and my 1-year warranty just ran out of date like 4 months ago