i hav MBP 2012 13' i7 8ram 1600 750,wifi always on,bluetooth always off, only surtfing website and ms office for typing, before 7hr after ML 4.30hr, who try this method is solve the problem about battery drain,please tell me after this.
from person in his blog :
I upgraded from lion to mountain lion on my macbook air 2012.
instantly I noticed that the battery life was terrible.
Instead of 8 -9 hours I was getting 2-3 hours. under the same load.
I looked round the apple forums, and didnt find anything.
I found a post somewhere [sorry, cant remember where] that suggested I delete the desktop preferences plist file and restart the Dock.
it seems to have worked for me.
I now have 8 hours battery life again.
to apply this fix:
you will loose your wallpaper settings, but your battery life should be fixed.
please let me know in the comments if it works, and I might be able to get some evidence to send to apple for a fix!
my question, how can i back normal setting for wallpaper. worry to try, pelase comment about this method.tq
Chris, I decided to re-enable my notification center again to see how it works on battery life. You are right about "using the Mac the way it was meant to be used". We shouldn't have to do work arounds ...
Incidently, I got a follow up call from Eric (my Apple Tech who has been tracking my battery issue) and we will probably take more diagnostic information. I have a new battery with 6 cycles on it and want to see how Mountain Lion is treating it. As I mentioned earlier in this forum after an upgrade to ML on my early 2011 13" MBP, the "Service Battery" notice came on. Yuck!
As with all my Apple products, I do go for the Apple Care Plan. It's a no-brainer for me and makes a huge difference. Worth it for sure.
Keeping my eye on things and hoping for a fix. The drain is way to quick on the batteries.
I upgraded from OS 10.5.x to Snow Leopard on my 2006 MBP 2,2 (OK, so I'm not exactly an "early adopter"). I started having dramatically shorter battery life, with a lot of the symptoms described here (service battery message showd up, fans running full tilt, running hot). So far, I've waded through the first 20 pages of this thread. My upgrade problems sound idenitcal to those described by folks who upgraded to Lion or ML. It's been a few weeks since the upgrade, and I've been using the computer regularly, so it's not just a matter of things going through re-indexing.
I've followed all of the various trouble shooting sequences described here, with the exception of doing a claen install (that's coming when I get the time). Resetting the SMC did help with estimated battery capacity, but I'm still not happy with it. It jumped from about 40% of rated new capacity to about 67%. Not great for a battery with only 150 cycles on it (I replaced the battery in April of 2011). After a week or so, this slowly dropped down to about 55% of new capacity. I've been running mostly plugged in, but do run on battery occaisonally just to see how it's working. I thought that the incidence of running very hot and "tornado-force" fans seems to have dropped somewhat.
I did notice something very strange today:
When running plugged in today, as I have for the past few days, the fans have been VERY quiet (in fact, I wondered if they were even working), and the computer seemed rather cool. The only software I launched was Firefox (14.0.1 - current version as of today), Thunderbird (14.0, current version), and Activity Monitor. I was also on Wifi (which is pretty much always for me). An occasional look at Activity Monitor did not reveal anything unusual (Firefox varied from 1 or 2% CPU up to 10%, with an occasional spkie higher - as expected, since all I was doing was reading this thread). Battery still showed 55+% of new capacity (not state-of-charge, which was 100%)
I uplugged for a bit. Battery seemed to drop relatively quickly. After maybe 20 minutes, the fans started to crank up, eventually getting back to the old tornado-speed, and the computer was hot (unfortunately, I did not check any system temps). I was doing exactly the same things I had done when plugged in (basically, reading this thread via Firefox, with Thunderbird and Activity monitor running). I checked the activity monitor: Firefox was varying right around 100% CPU usage. Battery dropped to about 40% state of charge over the course of 30-40 minutes of running on battery power. Battery capacity shows as 46% of new.
I plugged back in. After 5 minutes or so, the fans started to slow, and eventually dropped back to an inauduble level. Firefox is back down to 1 or 2% of CPU.
I let it charge back up to 87%, and unplugged again. It's been about 10 minutes, and Firefox is up to a steady 5% of CPU or so with no change i my activity. (I'm curious to see if it "runs away" again, but don't have time to stay on for another 40 minutes).
Does this wierd behavior spark any ideas?
(Sorry for the long post, but this seemed like something unusual)
I just bought my new Macbook Pro (13 inch, 8 gb ram) at the end of July 2012.
When I got it, it was still on OS 10.7, but I upgraded that to Mountain Lion almost as soon as I recieved it. Since then, the battery has gone from 8 hours to less than half of that. I don't have my screen on full brightness, I turned off bluetooth, etc but none of that seems to make any difference. Also, the computer gets very hot when all I'm running is Google Chrome and MSN messeneger (and nothing else).
I called Apple Support, and the guy asked me for the battery Cycle Count found under Power in system report. I told him the cycle count was 2 and then he told me that I had to take it to the apple store (which is 2 hours away) because I had a hardware issue.
I'm not totally convinced since my battery was just fine before I upgraded to Mountain Lion. Also, my mom has the exact same problem with her new Macbook Air (also purchased at the same time). We installed Mountain Lion on both these machines, and boom, the battery was halved.
I'm glad I found this thread before making the 4 hour round trip.
I downloaded the App "Temprature Gauge" from the App store because my MacBook Pro 13 i7 gets very hot and I wanted to check the temps and all within 10 minutes running Safari, Netflix, and just the open window of Firefox I got tempratures of:
CPU 1 CORE: 203 degrees
CPU 2 CORE: 206 degrees
CPU 1 DIODE: 208 degrees
FAN: 5145 RPM
BATTERY: 99 degrees
And the battery went from 100% to 82% in 15 minutes.
I kept getting warning messeges telling me to put the computer to sleep. You can't keep the Laptop on your lap at these temps. Anyway, just wanted to pass on the info.
P.S. The temp gauge for the Hard Drive is all the way up in the red at 109.
I'm one who may no longer be experiencing this problem on a 13 MBP i7 (2012) upgraded to ML via app store and migrated a Lion system from a 2006 MBP.
I'm mostly getting 7hrs+ and have been for over a week now... so at least in my case, there's evidence this is not hardware related. I have several posts listing what I did. These steps evidently don't work for some people, but they did for me. I'm hopeful the problems don't return, but you never know with these things and I'm still following this thread.
I did notice something strange though. When my estimated time gets low and I try to give myself more time by turning down the screen brightness from about 50% to 20%, and turn off the keyboard backlight, I actually show LESS time remaining. I actually get MORE battery time leaving the screen brightness at arount 40-50% & the keyboard backlight on the first notch rather than off.
Does this make any sense to anyone?
One more data point. 2012 Retina MBP, brand new, and getting very sub-par battery performance like everybody else with Mountain Lion. I upgraded it as soon as I got it, so now idea how Lion performed.
I did two things that have seemed to help -- gonna recharge to 100% tonight and run a more scientific test tommorw (I use my notebook 100% at work, but not so much over the weekends):
1) I disabled Notification Center completely, using the instructions found here:
- I also followed the instructions on here, and did NOT set my background back to my custom background, I've kept it on the default galaxy pic:
Between these two things my CPU actually hits 0% when it's idle (it always sat at 1-2%), the fans are both around 2k RPM, and it seems much cooler than it was before I did any of this. Not sure which one made the difference but between the two of these this rMBP is acting much closer to what I was expecting.
My $0.02. Like I said, this is all anecdotal at this point, YMMV, but perhaps some other folks can try this out and corroborate my findings.
PS: I'm apalled that Apple has been silent on this so far, it's really surprising, and disappointing. This is far worse than Antennagate (who the heck actually held their iPhone 4's like that?) and, honestly, I feel a bit taken advantage of. You don't expect this much hassle from a brand-new, cutting-edge, $3,500 notebook...
If Apple is actually monitoring this forum, shame on you. You're letting your most loyal users (had an Apple since the IIe) down.
Apple takes care of the situation! As you may see in this forum different people are in close contact with Apple staff (me as well, last contact 30 min ago) to find the root cause.
I know and I am with you that this is a very strange situation but I think Apple would like to find an end of the ongoing discussions as fast as possible to come out of the negative headlines.