Probably this thing:
- In this procedure, leave out all quote marks “ “
- Open Terminal (by going to the Applications folder and from there the Utilities folder and from there opening Terminal).
- On the keyboard type “cd ~/Library/Preferences/” and hit Enter.
- Now type “rm com.apple.desktop.plist” and hit Enter again.
Finally, type “killall Dock” and hit Enter
There is some good stuff in this thread, but I am having an issue with the MATH. Let's assume the capacity of the MBPr 15" battery is 8400-8600 (seems some overall ranges here, but 8400 should be achievable from a good charge or a slightly used battery)
At 8400, in order to get "7 hours" of usage one has to get the burn rate down below 1200maH per hour. That seems pretty hard to achieve. When I am running on battery, I'm often at 1800-2000 or so, but I have to take the backlight WAY down below 50% to even get near 1500mAh. I'm not really sure how one gets to 1200 unless one turns off wifi, takes the backlight down below 40% or so and makes sure to keep the dedicated GPU off. When I look at the detail provide by iStat menus, PPVCCSA S0 CPU seems to be taking up the most power, using betwen .65-.80 A. What is THAT thing doing?
Also, how does one easily check if something is logging to the log files, or making a query it cannot fulfill to see if something is indeed hitting the CPU or other and just wasting energy.?
YOU MUST READ THIS POST!!
So, I have done a couple things in the past two days. I updated to 108.3 (or whatever the latest was) and the new SMC controller for the rMBP 15"..
I ALSO did a PRAM and SMC reset. I probably should have done these two large things seperately, maybe do the PRAM/SMC resets and tested, and then done the 10.8.3 and SMC FW update and then tested.
But, regardless. Since yesterday when I did this I have now been getting just EXTRAORDINARY battery life. I have done now about 4.5 hours (which is a typical TOTAL day) and my battery life still shows 65% remaining and about 4-5 hours remaining. Now, I don't think I will GET that much, but I am sure I am going to get 6-8 hours today, which would be JUST SICK! Best battery life of any laptop I have used.
I have not seen any performance degradation, so I don't know what is going on to enable this, reduction in CPU or GPU switching? I'd really like to know, how would I test that?
So I'm trying to figure out the best way to keep my battery as healthy as possible in my retina Macbook Pro because I was recently told at the Genius bar that replacing this battery could cost around $400.
I've read in some places when trying to figure this out that you don't want your laptop plugged in all the time, I've heard newer batteries don't need to be periodically discharged to zero (calibrating batteries like in the older macbook pro's), I've read that you want the electrons in the battery to me moving as often as possible, so you want your computer to be charging and discharging constantly, that you shouldn't have the power cord plugged in if it is full (which would seems to lead to a high number of cycles). Now the Genius I went to today said I should keep my laptop plugged in more often to keep the number of my cycles low. I'm getting a lot of mixed messages and I am a bit confused. Anyone know the definitive way to keep your battery healthy?
Here are my current battery specs. I got my retina macbook pro July of 2012, so i'm at about 16 months w/ this battery
Device Name: bq20z451
Pack Lot Code: 0
PCB Lot Code: 0
Firmware Version: 511
Hardware Revision: 3
Cell Revision: 1150
Charge Remaining (mAh): 6862
Fully Charged: No
Full Charge Capacity (mAh): 7378
Cycle Count: 463
Battery Installed: Yes
Amperage (mA): -1236
Voltage (mV): 12080
I already suggested some techniques to find reasons of higher energy consumption. Having my retina MBP for a year now I finally found my solution:
Install OS X 10.9 Maverics and check the Energy tab in Activity Monitor.
In Maverics you find a new tab "Energy" in the Activity Monitor. The tap lists the energy consumption on a per process / per application basis.
I was pretty obvious that a specific application was consuming too much energy, draining the battery.
Look for processes consuming to much energy. If identified, check if you really need the stuff or if you could just uninstall it.
PS: In my case it was a background process which related to a software I rarely use for a SmartBoard. Theses guys seem to write pretty bad software, because that background process was running all the time and consuming 2%-5% even if none of their apps was running.
You are lucky that you do not live somewhere in Asia. In Apple's biigest growth markets they are instructed to give you the finger right away. A battery replacement in Asia will cost you 530 USD That's right. I phoned with Singpaore and they simply tell me that they cannot replace a battery in a 15 month old MBP Retina. you have to buy a new case. Never mind, the fact that I will tell anyone I know not to buy an Apple product in Asia. For starteers when you buy a Mac in Europe you do not need the Apple Care as by law they have to service your machine free of charge for three years. In Asia however Apple sees their customers as a walking wallet.
Just a general query.
My rMBP is 13 months old. Battery strength when purchased was 8760 mAh at Full Charge Capacity.
Fast forward 13 months and the very maximum charge now is 8012 at Full Charge Capacity. The cycle count is only 49. I have tried resetting the battery of course but still it seems to only hold 7900-8000 the past few weeks.
Should the battery be holding almost 10% less charge in just 13 months of use?