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Macbook Pro Battery Life

J

joleel7

macrumors member
Original poster
Aug 19, 2008
90
26
Hello

My week old 15" 2.53 GHz Macbook Pro battery life only last slightly more than 2 hours on normal use web surfing, email and 4 cycle count so far see battery information below. What is your MBP "Full charge capacity (mAh):"? My is only 4695. Sorry I am new to the Mac world any help is appreciated in fact Apple swapped me a new unit after my 3 days of MBP has a sound issue.


Model Information:
Serial Number: SMP-bq20z951-3999-b64
Manufacturer:
SMP Device name: bq20z951 Pack
Lot Code: 0000
PCB Lot Code: 0000
Firmware Version: 002a
Hardware Revision: 000a
Cell Revision: 0100
Charge Information: Charge remaining (mAh): 3571
Fully charged: No
Charging: No
Full charge capacity (mAh): 4695
Health Information:
Cycle count: 4
Condition: Good
Battery Installed: Yes
Amperage (mA): -1358
Voltage (mV): 11718
 
Makaveli6103 said:
What video card are you running. If you are running the 9600 I get around 2 hrs also. Also to boost your pattery life turn off you motion sensor. I turn it off when im using it on my desk and it helps. Here is a link on how to do it
http://support.apple.com/kb/HT1934
Click to expand...

Thanks for the link. I never imagined that could be a potential problem. Regarding the battery life, the 9600 getting 2 hours sounds about right, however, if you're using the 9400, 2 hours is a little low. Make sure if the problem worsens you call Apple.
 
Thanks for the reply folks i have an appointment with Apple Genius Bar on Friday see what they can find. BTW I am using 9400.
 
Open up activity monitor. Select all processes. Scroll down and see if anything is chewing up your cpu.
I was having the same issue until I called applecare. We found that I had a file share or something like that constantly taking up 50%, thus killing the battery..
 
You should be able to get more than 4695mAh. My old MBP, which only is supposed to get 4 hours of battery life, has about the same mAh. And my battery is old.

With a new Unibody, you are supposed to be getting 5 hours of battery life. That should be more than 6000mAh. You might have a bad battery.

Here is my status on my old MBP for comparison:
 

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alexbates said:
You should be able to get more than 4695mAh. My old MBP, which only is supposed to get 4 hours of battery life, has about the same mAh. And my battery is old.

With a new Unibody, you are supposed to be getting 5 hours of battery life. That should be more than 6000mAh. You might have a bad battery.

Here is my status on my old MBP for comparison:
Click to expand...


After checking my battery my max is only 4600 mAH and the battery age of my mac is 123 months :eek: let hope Apple can swap me a battery tomorrow.
 
theITGuy said:
Sounds about right like others have said if using the 9600 instead of the 9400...websites with flash are CPU hungry which will also eat up your battery life...

Cheers.

-J.-
Click to expand...


I use adblock plus on firefox to block the flash banners. Hopefully that adds to battery life.
 
alexbates said:
With a new Unibody, you are supposed to be getting 5 hours of battery life. That should be more than 6000mAh. You might have a bad battery.

Here is my status on my old MBP for comparison:
Click to expand...

The new unibody macbooks and pros have smaller battery capacities than the last generation... so it would not be more than 6000mAh.

The MBP's max charge for the new generation is 4600mAh...whereas the last gen was around 5600.

OP: Your battery seems fine...just check your Activity Monitor to see if there are any rogue processes hogging up CPU cylces.
 
I have a question - I have the unibody MBP and use the 9400 graphics more often then not on the machine.

My battery health shows 95% and I've only used it 3 cycles so far.
I charged it all the way at first, unplugged it, drained it fully and recharged for my first charge (health was at 99% then).

I usually use it plugged in (had it a couple of weeks) and the other day I happened to need it on battery power, got down to 40 minutes of power left... 92% health. I charged it up at that point and now have 95% health.

Is there anything I can do to improve this?
Is this odd?

I haven't owned a laptop before ever so this whole concept of battery use is new to me. Thx.
 
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