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MacBook Pro Battery all over the place
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Clinically Insane
Join Date: Dec 1999
Status:
Offline
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I've seen lots of threads on Apple's discussion page, but no answers that've helped me. Was hoping someone here might've ran into this issue and had a solution.
I have a 15" MacBook Pro, latest one. OS X Lion, all updates. It has a 250GB SSD and 8GB of RAM. The battery seems to only last about 2 to 3 hours. If I bring down the battery pull down menu, it flucutates all over the place every few times I pull it down. Sometimes it's almost 6 hours, sometimes it's only an hour and a half. This is with a full charge.
I did a top -o and there's nothing running that's taking more than 1% or 2% of the CPU. So it's not some errant program or process hogging the CPU.
Any ideas?
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"…I contend that we are both atheists. I just believe in one fewer god than
you do. When you understand why you dismiss all the other possible gods,
you will understand why I dismiss yours." - Stephen F. Roberts
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Addicted to MacNN
Join Date: Jan 2000
Location: Stoneham, MA, USA
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You can use Activity Monitor to get a longer term view of CPU use. Change it so it only updates every 5 seconds. Do you tend to leave lots of browser windows open? Do you browse sites that are heavy on flash ads? That stuff can chew up your battery very fast.
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Moderator  Join Date: Apr 2000
Location: Gothenburg, Sweden
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I agree that you should start with Activity Monitor, but if that doesn't work, take a look at Dtrace. I hardly know how to use it myself, but whenever I try I'm amazed how much information you can get.
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The current Mac Pro is the most out-of-date Mac since the Macintosh Portable
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Clinically Insane
Join Date: Dec 1999
Status:
Offline
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I'll give those a try, thanks.
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"…I contend that we are both atheists. I just believe in one fewer god than
you do. When you understand why you dismiss all the other possible gods,
you will understand why I dismiss yours." - Stephen F. Roberts
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Mac Elite
Join Date: Mar 2004
Location: Truckee, CA
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It is under warranty so IMO talk to Apple. It is good to document anomalies (my 2011 SSD MBP does not behave that way).
-Allen
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Moderator Join Date: Oct 2001
Location: San Jose, CA
Status:
Offline
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What's your brightness set to? Are you using integrated graphics or not? Bluetooth? Wifi?
Yeah, 2 to 3 hours doesn't seem so great, especially if this is from a clean reboot and you don't open any applications.
Steve
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Celebrating 10 years and 4000 posts on MacNN!
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