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OS X Lion Battery Life

I downloaded Lion last night and played around on it for a minute or two then put my MacBook on the charger and went to bed. I woke up this morning and turned on my white MacBook 13" with 100% battery. After just 3 hours, with my brightness on the second to lowest setting, my battery was at 35% so I stuck it back on the charger, waited until it was at 100% again, then took it off. Once more within about 4 hours my battery was dead. I never had this issue until after the Lion update. On Snow Leopard I could usually get 3 or 4 days outta my battery before I had to charge it. Anyone else having battery life issues after updating to Lion?

MacBook 13"

Posted on Jul 21, 2011 8:17 AM

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Posted on Jul 21, 2011 11:15 AM

Yeah I'm getting about 4 hours on my 2010 13" MacBook Pro since I installed Lion. The battery life is much worse than it was on Snow Leopard.

65 replies

Jul 21, 2011 2:45 PM in response to deepblue1

I checked the discussions page and the terminal command isn't working for me it just gives me a message saying command not found. I checked the folder where the file should be located and the com.citrix.agadminservice.plist file isnt there. It seems that my battery drain is being caused by something other than that because I looked at Activity Monitor and there is nothing using that much of my CPU. Guess I'll just keep searching and hope I find something or hope Apple releases an update to fix this.

Jul 22, 2011 7:40 AM in response to Sammeh!

This may not be an option for you, but I called AppleCare and had them help me reinstall Snow Leopard because there were a few bugs that were really a problem. I then restored from my Time Machine backup and now I'm back on Snow Leopard without any issues. I'm going to reinstall Lion probably after 10.7.1 or 10.7.2.

Jul 22, 2011 12:40 PM in response to Sammeh!

I just called Apple support and they talked me through resetting the power manager, the battery now seems to be fine. I can give you the steps the gentleman over the phone gave me, it might just help.


1. Turn off the computer.


2. Hold down Ctrl+Option+shift


3. While holding down these button, press and hold the power button as well.


4. Hold all buttons for at least ten seconds.


5. power back on the computer.


For me that worked, i don't know how it will work for everyone else but immediately my power estimation jumped up to around 9:30 and 10 hours. 🙂 Which is two hours more than i started with.


Jul 24, 2011 6:03 PM in response to Sammeh!

I've tried reseting it with PhangirloftheOpera's suggestion many times. The fan went quiet at the start but became noisy again after a while. Prior to Lion, after a full charge it can last me for about 5-6 hours but now it's only 1 hour and it fluctuates too. Sometimes it will even say that it's not charging then it says that it's charing again. Is there any help anywhere, especially from Apple's side? Please help, much appreciated!


I'm running on -

Model Name: MacBook Pro

Model Identifier: MacBookPro8,3

Processor Name: Intel Core i7

Processor Speed: 2.2 GHz

Number of Processors: 1

Total Number of Cores: 4

L2 Cache (per Core): 256 KB

L3 Cache: 6 MB

Memory: 8 GB

OS X Lion Battery Life

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