View Full Version : Macbook Pro Mid 2012 13 Inch terrible Mavericks battery life.

3rd November 2013, 08:26 AM
Hi All,
My 2012 Macbook Pro has always had useless battery life.... I bought it new in September 2012 and the battery heath was already at 92 percent. I take care of the battery, doing full charge cycles, and I'm not expecting miracle battery life. When I installed Mavericks (Clean install done about a week ago) battery life has just gone.

For example I'm on 53 percent currently with 1 hour 43 minutes remaining :/

http://farm8.staticflickr.com/7402/10633900474_cf8dc3069e.jpg (http://www.flickr.com/photos/79529975@N02/10633900474/)
Screen Shot 2013-11-03 at 9.06.26 am (http://www.flickr.com/photos/79529975@N02/10633900474/) by oldmacs (http://www.flickr.com/people/79529975@N02/), on Flickr

This is my battery health report:

http://farm6.staticflickr.com/5500/10634174023_1bc0a4215a.jpg (http://www.flickr.com/photos/79529975@N02/10634174023/)
Screen Shot 2013-11-03 at 9.13.44 am (http://www.flickr.com/photos/79529975@N02/10634174023/) by oldmacs (http://www.flickr.com/people/79529975@N02/), on Flickr

I've been to Apple 4 times now. I've been told my battery life is normal, even though in Mountain Lion I was getting 4.5 hours max and now I'm getting under 3.5 hours. I've also been told that its my usage. I told them that in attempts to save the battery I had turnd the brightness down as far as it could go and I turn off Wifi when not in use, leaving only pages running. I was told that would use my battery more than Safari and iTunes, 50 percent brightness and wifi on (Apparently what the battery life was tested under). They also said that the 8GB ram upgrade I installed was ruining my battery. I've had the service battery come on, but thats normal as well (I was told).. rubbish.

My White 2008 Macbook probably gets equal or more battery life than this Macbook and it has a two year old battery with more charge cycles, however the health is at 93 percent. That tells me that theres something wrong with this battery.

Anyone got any ideas on fixing this one? Is it a software tweak I need. I don't think its worth going back to the genius bar again to be told my battery is perfectly normal. I think in the end I'm going to crack and just pay for a new battery. This machine has been a curse, everything has gone wrong. That would be fine if Apple had decided it would help me by possibly investigating whats wrong with it and replacing parts. But no, I continually get told that there is nothing wrong with it, even though there so obviously is.

4th November 2013, 05:04 AM
If you've already had a service battery error appear, you still have a case for a replacement--it'll be easier to complain to the office of the CEO(Tim Cook) and let customer relations work on your issue. I'd avoid the Apple Store in question and go elsewhere too.
Battery life on 13" MBPs(2010-2012) are generally close to 7 hours with light weight apps and hover closer to ~4.5-5 hours with MS Word/Pages/iTunes/Safari/etc. Going by the screenshot of power usage, it says using 14.73 watts which means the OS is doing something to be drinking battery power--iTunes/MS Word '11/Pages rarely kicks the processor above 8.5-9 watts.

As far as them blaming the RAM, whenever I maxed out the memory in my Macs it helped battery life as everything I'm working on is cached into memory which allows the HDD to idle--as a result better battery life.
When all else fails, try another Apple Store or opt for a dealer if there is any of them left in your regional market. Considering most genius bar staff lately handle less Mac specific users due to the influx of iPad/iPod/iPhone owners, a fair number I've met mainly dual-boot their iMac---never met a genius who owns a portable Mac. Any time I need repair work under warranty I travel to another state for a dealer who knows their stuff.
...I feel your pain, if I wasn't mobile as often I'd rather own a top-end iMac instead.

4th November 2013, 12:36 PM
From experience, I can tell you that battery issues are pretty black and white. Regardless of what usage numbers you previous got/currently have, if the Apple diagnostic says your battery is OK, then there's not a lot Apple can/will do to replace the battery.

4th November 2013, 01:22 PM
not really sure what to say about your problem besides taking it to another store. Thanks for the app recommendation though :)


4th November 2013, 06:30 PM
Follow-up to my previous post: Apple aren't likely to take your "but it got better/worse/whatever battery life on the previous OS" claims into consideration when you're presenting your case.

Have you talked to AppleCare about this issue? Would be your best bet for successful resolution IMHO.

Alec Fraser
4th November 2013, 08:07 PM
Have you tried doing a fresh install? I had shit battery life (on both Mountain Lion and Mavericks) up until wiping and reinstalling a fresh copy of Mavericks. I also didn't restore from a time machine backup.

4th November 2013, 08:59 PM
I might try complaining to a higher level... I maintain tht this macbook is cursed!! Even when it was new it was getting 5 hours max doing practically nothing :p eg wifi off using pages.

Yeah I think I'm unlucky. Last time the dot was really really close to the level where it shouldn't be. Maybe another try at a differnet srptore would help.

I'm onto my 8th or so clean install since September 2012 when I bought it. My current install is a clean install from a week and a half ago.

Thanks for the help guys :) hopefully I get his resolved.

5th November 2013, 02:55 AM
Before a reinstall, have you tried a parameter RAM reset? I doubt it's the problem but do it anyway.

Also, after fully charging can you restart, log in and then open Activity Monitor. In the View menu select All Processes and then on the CPU tab sort processes in decreasing order of CPU activity. After giving it a few seconds to settle down, what is the idle percentage (located at the bottom of the window)? If it's less than 99% which processes are using the most power?

Leaving everything in this state (and with brightness around 50%), unplug the power cord and wait for the battery to calculate the time remaining. What is that time remaining?

The utility seems to indicate that your battery health is OK, though you have been pumping it hard with almost 500 cycles already! Be aware that it's not necessary to completely drain and recharge batteries every cycle. In fact, doing so might be doing more harm than good. It's worth draining the battery fully every so often so the OS can provide better estimates on remaining power levels.