Battery Life on Mountain Lion?

[Afbar1114]

my battery life on my MBP late 2011 went down after installing mountain lion. anyone else having this issue? i charged it to 100% it said 5 hours or so used to say 8-9 hours. it was at 88% and said 4 hours.

 

[Gregintosh]

The "estimate" changes frequently. For example, you stop doing anything and you close your programs and it may say 9 hours. You run a quick video and it will say 2 hours. It just changes all the time.

The best way to measure how much battery you really got is to actually measure with a clock and see how much percent you lose after X amount of hours of usage. That's the most accurate way.

 

[wiznet]

Mine's still close to nine hours. Mind you, my brightness is about 3/4..

What are your settings like?

And as said above, the estimate changes quite frequently.

 

[Afbar1114]

is it the SSD i installed?

 

[fins831]

2009 MBP averaged 6-7 hours and now getting 3-5 depending on video watching.

I def think there is a drain with this version, i've seen a battery drop of like 30 percent. Was just 28 percent, and did some browsing at half brightness, and 10 min later I am at 17 percent. I think I tweeted 3 times, wrote 1 email, and read 2 articles...it just seems to have iPhone like battery drain...

 

[GGJstudios]

my battery life on my MBP late 2011 went down after installing mountain lion. anyone else having this issue? i charged it to 100% it said 5 hours or so used to say 8-9 hours. it was at 88% and said 4 hours.

There are many factors that impact your battery life. See the BATTERY LIFE FROM A CHARGE section of the following link for details, including tips on how to maximize your battery life. From that section:

• Your "time remaining" indication is an ever-changing estimate, based on the current workload of your system. It will fluctuate up and down from minute to minute as your power demands change. It is not perfectly accurate, but only an estimate.

This should answer most, if not all, of your battery/charging questions:

Apple Notebook Battery FAQ​

 

[Afbar1114]

Called apple. The rep said it's a known issue

 

[dr.george]

Called apple. The rep said it's a known issue

hope they fix this soon, its driving me nuts

 

[Newbie MacUser]

hope they fix this soon, its driving me nuts

I ain't upgrading to ML until they get that battery life issue fixed...

 

[jbzcar]

Mine went up on my late 2008 after upgrading to ML.

 

[Afbar1114]

so right now i have 37% battery life losing about 1% every 3minutes. and it says i i have an hour left. this is not good. i might go back to lion if this doesnt get fixed