Q: Battery life dropped considerably on Mountain Lion.

Is Apple doing this so that they can boost their new batter selling target?

Thats what I tried and posted a few posts back, and it worked.

Retina Macbook Pro

Battery life ~7 hours UNTIL mountain lion upgrade. With mountain lion it has been under 4 hours, at best, with minimal usage (safari).

Phoned apple, they have had a few calls but apparently it is not currently elevated to a point where a fix is being worked on. PHONE APPLE, OPEN A CASE AND REPORT THE PROBLEM.

Here is my battery info in case it is of any use in identifying the cause:

Battery Information:

  Model Information:

  Serial Number:          D86228731C9DNMGAZ

  Manufacturer:          SMP

  Device Name:          bq20z451

  Pack Lot Code:          0

  PCB Lot Code:          0

  Firmware Version:          511

  Hardware Revision:          3

  Cell Revision:          1150

  Charge Information:

  Charge Remaining (mAh):          6163

  Fully Charged:          No

  Charging:          Yes

  Full Charge Capacity (mAh):          8405

  Health Information:

  Cycle Count:          13

  Condition:          Normal

  Battery Installed:          Yes

  Amperage (mA):          3299

  Voltage (mV):          12240

Would someone mind posting a step-by-step for completing #2 below?

Thanks,

  2) 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:

http://jonathansblog.co.uk/how-i-fixed-my-mountain-lion-battery-issues-on-a-macb ook-air-2012

xisko wrote:

 

Hello, I've observed that always exist a process with 5-10% of CPU (kernel_task) in Activity monitor with 1.5 GB of RAM. :O

"kernel_task" is a base process for OSX!!!!!

josephniet wrote:

 

Phoned apple, they have had a few calls but apparently it is not currently elevated to a point where a fix is being worked on. PHONE APPLE, OPEN A CASE AND REPORT THE PROBLEM.

 

Apple has opened a case, don't worry.

The ML 10.8.1 update is coming...

rcmcfe wrote:

 

Would someone mind posting a step-by-step for completing #2 below?

 

Thanks,

 

 

 

  2) 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:

 

http://jonathansblog.co.uk/how-i-fixed-my-mountain-lion-battery-issues-on-a-macb ook-air-2012

Backup the ~/Library/Preferences/com.apple.desktop.plist in your desktop (optional)

open the Terminal (you can use spotlight to find it);

digit: sudo rm ~/Library/Preferences/com.apple.desktop.plist

insert your password and press enter (it will remove the preferences file from your user/library/folder)

digit: killall Dock

it will restart your dock

exit form terminal

there you go

12 minutes and 8 % gone just like that. and I only have Outlook,  Safari and Chrome on. Owhh and Janeter for twitter as well.

I didnt see that the battery is one of the  critical point that they are fixing

I posted earlier in this thread on my situation.

I installed ML on an early 2011 MBP. I immediately saw drastic negative effects on battery life, including "Service Battery" message, and the battery health dropping suddenly to 28%. (It would only hold 28% of a full charge.)

And when I say immediate, I mean within less than a day of the upgrade.

I went into the Apple Store over the weekend and had the battery replaced. The Genius I spoke with, while he was extremely nice and helpful, said he had NO knowledge of any battery issues with people running Mountain Lion I politely said that it seemed to be a big deal online. He said you can look for any problem about any product online and find people that are experiencing it.

I really hope that doesn't reflect official Apple policy.

In any case, if I shut down wifi, turn down backlighting to minimum, and turn off the keyboard backlight, I can get this BRAND NEW BATTERY to last 6 hours doing nothing. Any actual usage, say checking email, browsing online, working on a document, brings it way down to the 3-4 hour range. Watching a video cuts even more. (And yes, I have the app installed to switch to integrated, as opposed to discrete graphics.)

I have not turned off Notification Center (yet), although I did try the killall Dock procedure.

The new battery is warranteed, and if it shows an unnaturally fast decrease in health, I will bring it back in.

Anxiously awaiting an update, or at least a real acknoledgement of the issue....

Anyone out there with 2 mins to try this link - It's the latest NASA image but it kills my (Safari Web Content) with 100% CPU hit and my fan goes crazy! ; http://anon.nasa-global.edgesuite.net/anon.nasa-global/msl/figure_1_raw.png

It loads fine on the same machine, in a VM on Internet Explorer (Win 7).

But it's not normal that uses 1.5gb or ram.....

xisko wrote:

 

But it's not normal that uses 1.5gb or ram.....

Maybe... depends on active processes.

Franc_Iphone wrote:

 

Anyone out there with 2 mins to try this link - It's the latest NASA image but it kills my (Safari Web Content) with 100% CPU hit and my fan goes crazy! ; [link deleted]

 

It loads fine on the same machine, in a VM on Internet Explorer (Win 7).

It's an enormous graphic that Safari stops trying to download and quits and chokes Firefox and Chrome on my iMac, so nothing to do with Mountain Lion or battery life.