Currently Being ModeratedJul 26, 2012 6:32 PM (in response to tcphoto1)
Same problem, with SL I had six hours of battery life with a 2009 MBP 17" 2.66ghz and 8 gb of ram. Since i have upgraded to Mountain lion the battery lasts about 2 hours, depending on what I am doing, even less... I am going to wait a couple of months and if apple doesn't solve this problem I will go back to SL!!!
Currently Being ModeratedJul 27, 2012 6:34 AM (in response to tcphoto1)
Same here. I'm running a 13" 2010 MBP with 2.4 ghz processor and 8 gb of RAM. I went from about 5.5/6 hours of run time on Snow Leopard to 4 or less with Mountain Lion. That's a drastic decrease in performance. I really hope a SW update can provide a fix, or I may need to downgrade.
Currently Being ModeratedJul 27, 2012 6:44 AM (in response to tcphoto1)
I'm running a 2.53 8GB Mid-2010 15". Before Mountain Lion, I would only have to charge my MacBook late evening before I go to bed and it would last the entire next day. I don't steadily use it, but I can get about 6 hours out of a full charge as I don't do a whole lot of battery intensive activities on here, mainly just use Safari and Mail.
With Mountain Lion, I notice a significant difference. It's mid-morning already and I am down to 59% battery life. I've been reading these forums for the past 35 minutes and my battery started out at 98%. I'm doing no different now than I was before the upgrade, which is just Safari and Mail running. My brightness is sitting at just under 50%.
Currently Being ModeratedJul 27, 2012 7:04 AM (in response to tcphoto1)
Same here. I am running the new MacBook with retina display. I think this is because iCloud. I have not tried yet but if we turn iCloud off, maybe it will help. It does in my iPhone.
Currently Being ModeratedJul 28, 2012 3:06 AM (in response to tcphoto1)
I am on a MacBook 2009 with 4GB ram. My battery life has gone from 4.15 hours to 2.04 hours with only Safari open.
Not happy with ML at all, and Airplay, power Sleep. MIA (I know the reasons why but still)
Currently Being ModeratedJul 28, 2012 5:24 AM (in response to tcphoto1)
Macbook Air 2012 Q1, I'm seeing my battery life drop from 5-6 hours down to less than 3.
I'm also seeing hard lockups which need me to power the MBA off completely and restart. At this point, I don't really see anything I like in ML, and really just want to find a way to go back...
Currently Being ModeratedJul 31, 2012 7:54 AM (in response to tcphoto1)
I bought a mid 2012 Macbook Pro 13 i7 machine that had Lion on it. Upgraded to Mountain Lion and saw my battery performance go from nearly 7hrs under Lion to just over 2hrs under ML. I read several threads and tried all the SMC/PRAM resets, killing email accounts that I don't use much, turning off iCloud, etc. to no avail. They only made a marginal difference.
I was about to call Apple as a last resort, and then look at returning this machine since I'm still inside my return to BestBuy window.
On a whim, I started closing apps one by one that automatically launch on start up. After closing SugarSync, most of my battery performance came back. Closing DropBox helped some as well. Now, it appears that pretty much all my battery performance is back and possibly a bit more than before with Lion.
I haven't tested this for days or anything, but for the last few days I've only been consistently getting a little over 2hrs of performance on a full charge. Now, as of last night and this morning, I'm getting at least 7hrs and sometimes showing over 8hrs left. I've only been running Safari and Mail, but just closing SugarSync and DropBox seemed to have drastically improved my battery performance under Mountain Lion.
Currently Being ModeratedJul 31, 2012 8:26 AM (in response to tcphoto1)
Funny, this morning my battery's health dropped to 74% and then jumped back up to 90% about an hour later. I continue to have shorter battery life and hope that Apple is working on an update. I have reconditioned my battery, reset SMC, checked Activity Monitor and have found nothing unusual.
Currently Being ModeratedAug 1, 2012 5:14 AM (in response to tcphoto1)
Please post on this common thread.
Forbes has picked this up and the more people we see posting, I think the more attention we might get from Apple..
Currently Being ModeratedAug 9, 2012 2:07 AM (in response to tcphoto1)
I have the same problem with a MBP 15" early 2011....
Battery drains like crazy when the system is sleeping.... with Lion i had 2% a 5% battery consumption over night....
Now i have from 10% till 20% of battery comsuption...