Q: Battery life dropped considerably on Mountain Lion.

They contract with other stores to do the work, there may be a service center near you.

Like we say in my country, I´m feeling like a fool in the middle of a bridge, should I go back or forth??

I feel disregarded... My battery is losing health, my mac is no longer a laptop it became a desktop needing the AC cable.

I know every OS has glitches and bugs, I´m aware of it BUT shouldn´t Apple just SAY something!!

i tried going back to SL and all my data was lost..as time machine saves one full backup and then the changes made (and i have a small external hard drive) the full backup was deleted for space and i had the little day to day changes left on my machine.  i ended up back with ML, but i clean installed and upgraded RAM and get about 6 hours battery life.

As I have said, all my work is now transferred to my iMac as my MBP is running out of battery very quickly.  I will wait until Apple come up with some solutions

Looks like I solved this issue.

I got a 2012 Macbook Air 13 inch, that came with Lion. After Ugrading to Mountain Lion, I had the battery issue and they were still present on 10.8.1

So I now decided to try a reinstall with the recovery HD (Booting, hitting Alt, selecting recovery HD, wait for the magic). After that, my battery life was normal again.

Macbook was fully carged, I went to the cinema, came back 4 hours later and the Air still statet 65% charged with over 7h runtime left.

OMG I am so ****** now. So in an effort to fix this **** battery issue I decided to bite the bullet and do a fresh install of Mountain Lion (seems really friggin' dumb to have to do this when upgrade is an option) . But guess what? I used the Lion DiskMaker utility to create a bootable USB drive of the OS and wiped everything and then tried to install the OS again. It goes through everything and then at the end just gives me an error similar to "can't download additional components needed to install the OS". ***...Seriously ***??? "Just works" my feckin' ***. Arghhhh!! So now I have no working OS on my MBP and seeming can't even do a fresh install of the one I just bought! Nice! Seriously, windows is a lot easier to install.

Ok, well that's akward:

After using my laptopp a few hours, rebooting it 2-3 times, the battery life is ****** up again.

I am now charged at 100% again, but I have only 5:20h left.

Only stuff I did since my reinstallation was some copying from a external HDD and playing around with time machine.

Any ideas? If not, I guess I have to go back 10.7

I guess I'll go out on a limb now.

Running a computer that isn't working properly is a bad idea. Even if the problem is in the software, it can force the hardware to work harder and burn out faster. It's kind of like putting your laptop in an oven, to see how much heat it can take.

There is no solution. There wasn't one for the users who had problems with Lion last summer, and there isn't one here. Just a lot of pain.

Running 10.8.1 on 13" 2012 MBP, it tooks 10 minutes to went 89% from fully charged battery. i was only using safari with 50% light screen as suggested and 2 bar of keyboard light.

I put Clean installation of ML into my other partition and boot from there, the result just same.

Late 2011 MacBook Air

After the fiasco of ML contact via this forum from Apple and running the diagnostic tool sending the data back for no reply decided to go to Apple store after ringing and speaking with senior support at Apple care Australia. They claimed to kno nothing about the battery situation ??

Apple genius. Claims that this Macbook Air model advertised on site to have 4 hours battery life  ? I asked to reinstall Lion after demostrating the battery probelms to him. Result = Get home iPhoto wont work, energy saver preference pane wont load laptop goes dark every couple of min wothout use can't change it. He did a network install but didn't wipe disk first.

Hours of stuffing around on the phone again= no one will aknowledge the battery problem really poor service.

Finally last nite start up from recovery partition wipe disk clen twice, reinstall Lion and get everything working including energy savinge preferenes.

Battery= Lost 3% overnite until now closed asleep no programs open.

Just opened up had a look at Battery Health app closed that sitting here typing on iMac watching in 5 minutes another 3% fall in battery percentage. **** nt fixed !

Now after 24 cycles battery health down to 94.7% which is up from the 93% whilst on ML but still not happy it's doing wired stuff at first on open tellingme approximate battery life left 2.15 hours now telling me 7.24 now gone down to 5.01 *** has ML done to the chips in these batteries. Thinking of demamding a new machine or at leats a battery because of the stuff up ML has done but Apple Australia pretending there is no issue ? What to do it's useless as a portable like this while I type it's gone back to 6.45 hours left just erratic.... might watch and see what happens ? Anyway it's a real pain in the butt Apple that you can release software like this and cause so many problems for so many customers and not aknowlkedge it.

In the time it took to click post and them look at it and click edit it's gone back to4.5 hrs remaining from 6.45 and now down to 92% in five friggin minutes.

Gianluca,

From the previous posts, those that went back to Lion did not regret it, provided they did a clean install and did not import apps or settings from ML.

If I had warranty, I would use it to have the machine replaced. If not, going to the last working OS, in some people's case, Lion, is the only way.

Waiting just kills the batteries and guarentees a $ 150 replacement. unless, like the user above, that convinced Apple to replace his battwery for free.

Apoc,

Classic issue with dowloading. I eventually created a dual layer DVD and that helped. OR use ethernet. It's just a wifi transfer error.

By the 5th cycle, the MBA battery I got seems to have increased span- typical li Ion needs 4-5 cycles to begin performing, so it lists me anything between 8-9 hours wifi only. I even added a wireless mouse and it does not dent it.

ApocalyArts

[...]

Any ideas? If not, I guess I have to go back 10.7..

Reply:

they say that smart people learn from their mistakes, wise ones from other people's mistakes. So the posts had success with reverting to 10.7, and extremely, extremely few people somehow had their issue solved on ML. So your answer lies above.

Hey eddyr,

After your clean install, and software import, the indexing will be consuming your battery fast a bit, even on Lion, but only temporarily. Let it run a few cycles and tell us if it is still degrading as badly. It should not, hopefully.

Chris

hi beisarius,

thank you for your advice.

i waited one month sure that apple will fix these issues. but it isn't so. the thing i notice is that with 10.8.1 the battery heats less. did you notice this too?

i have the 10.6.7 install dvd as i bought my 13" mbp i7 the same days 10.7 came out so i download it for free once home (it was end of august 2011). and i did the apple care 3 years.

i don't have time machine so i'll buy an external hd, i'll back up and go back to 10.6.7 and then upgrade it to lion with a clean install.

could this work? or better to go to the apple store and ask for replacements?

i was sooo happy for my mbp, it was the perfect computer!

thank you?