Very Poor Battery Life on rMBP

[bbasra]

Hi,

I've had my rMBP about a month and it came shipped with ML and has all the updates applied.

I get very poor battery life. Even now with the battery 100% fully charged, it says 4:53 mins remaining.

I've done :

1. Battery calibration
2. Open Terminal:
Type the following, hit enter after each line:
cd ~/Library/Preferences/
rm com.apple.desktop.plist
killall Dock

I do use it at 2/3 brightness and surf using google chrome....

 

[GGJstudios]

I get very poor battery life. Even now with the battery 100% fully charged, it says 4:53 mins remaining.

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.

The built-in batteries in the newer Mac unibody notebooks come pre-calibrated and do not require regular calibration like the removable batteries in older Apple notebooks.

The link below should answer most, if not all, of your battery/charging questions. If you haven't already done so, I highly recommend you take the time to read it.

Apple Notebook Battery FAQ​

 

[sammyvine]

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.

The built-in batteries in the newer Mac unibody notebooks come pre-calibrated and do not require regular calibration like the removable batteries in older Apple notebooks.

The link below should answer most, if not all, of your battery/charging questions. If you haven't already done so, I highly recommend you take the time to read it.

Apple Notebook Battery FAQ​

Does the macbook pro 13' 2012 need calibrating?

 

[GGJstudios]

Does the macbook pro 13' 2012 need calibrating?

No. Did you read the links I posted?

 

[bbasra]

I shall give that a read and see how i get on.

Battery Information:

Model Information:
Serial Number: D862296333UDNMGA3
Manufacturer: SMP
Device Name: bq20z451
Pack Lot Code: 0
PCB Lot Code: 0
Firmware Version: 511
Hardware Revision: 3
Cell Revision: 1150
Charge Information:
Charge Remaining (mAh): 7630
Fully Charged: No
Charging: No
Full Charge Capacity (mAh): 8344
Health Information:
Cycle Count: 12
Condition: Normal
Battery Installed: Yes
Amperage (mA): -1435
Voltage (mV): 11986

 

[davidtutu]

No. Did you read the links I posted?

so why do most people on here with the latest macbook calibrate their battery, or is just me?

 

[GGJstudios]

so why do most people on here with the latest macbook calibrate their battery, or is just me?

What evidence do you have that most do that? If they do, they're misinformed.

 

[jasonbro]

so why do most people on here with the latest macbook calibrate their battery, or is just me?

never trust a man that goes by the name "david tutu"

 

[Dark Void]

The number displayed is just an estimate, and also the rMBP is advertised at 7 hours. That is also an estimate and is subjective in terms of factors that actually effect the battery.

It doesn't seem to be that poor of battery life to me.

 

[AppleWarMachine]

4:53, that's pretty good.

 

[slirak]

Actually, there's been a lot of talk about how ML significantly lowered battery life. 10.8.1 seems to have made things a bit better than 10.8, but still far from 10.7.x. Rumor has it that 10.8.2 more or less restores battery life to 10.7.x levels.

 

[Spicedham]

That's normal. I get about the same battery life. At 2/3 brightness that's why its draining fast. Although really dim, try test out using it at 1 and you'll realize its the screen that drains it. Don't worry about the battery its fine.

 

[Puevlo]

The Apple website clearly states that the MacBook Pro Retina has 7 hours of battery. Therefore anything less means it is broken. Or they are lying.

 

[GGJstudios]

The Apple website clearly states that the MacBook Pro Retina has 7 hours of battery. Therefore anything less means it is broken. Or they are lying.

That is completely false. Try reading the information posted on Apple's site, as well as many threads in this forum. Stop posting misinformation.

 

[eric44]

I was concerned about my rMBP's battery life but had not thought it through.
I am running 10.8.1 and getting variable battery life, the answer of course was it varies depending on what I have asked it to do!
The screen brightness makes a huge difference.
I am sitting here with a window behind me with the auto screen brightness at max. 86% battery - 4 hrs 54 mins mins left.
If I cover the sensor the brightness drops to 1/3rd and the time left increases to over 6 hrs (after a bit of a wait).
Seems clear that the screen draws a lot of juice.

 

[hexor]

10.8.2 fixes short battery times.

 

[Pagga]

10.8.2 fixes short battery times.

That´s what I heard as well.

A possibility, if you can´t wait for 10.8.2, is to tick off the various choises in iCloud. Supposedly, this helps battery time a little. Otherwise I can recommend gfx Grafic Card Status, a little app that let´s you chose the graphics card according to your own needs and wishes.


P