Sidebar Sidebar
Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.

battery calibration (MBP 2010)

R

rickeames

macrumors 6502
Original poster
Mar 12, 2008
392
71
I have a 15" i7 MPB and I thought I calibrated the battery right, but now I'm not sure.

- charged it up full
- ran it down on battery until it slept
- let it sleep for 5 hours
- charged it up and let it stay that way

I just took it off power and the most I get from the reading is six hours. I was somewhat expecting more. Did I calibrate incorrectly?
 
Sigh.

If you can read and followed the instructions you more than likely did the calibration correctly.

The problem arises from a misunderstanding of how the battery "time remaining" indicator functions. It's based on your machine's usage at a small sampling interval, updated every few minutes. If you're doing something that takes a lot of power, it will show less time remaining. If you stop that process, time remaining goes up.

Use the % remaining indicator and time how long you actually get under the advertised conditions. I bet it will be comparable.
 
hi, well ya that's how u calibrate...! upon my calibration my battery reached (P.S: i didn't edit or photoshop the pic):
 

Attachments

  • battery.jpg
    battery.jpg
    14.3 KB · Views: 713
Hmmm, well now I wonder if i did it incorrectly. I am at 4:48, 84% remaining and I am just using safari, no flash, integrated graphics being used. :(
 
rickeames said:
Hmmm, well now I wonder if i did it incorrectly. I am at 4:48, 84% remaining and I am just using safari, no flash, integrated graphics being used. :(
Click to expand...

Even calibrated, the 'time remaining' isn't particularly accurate. Just chill out and enjoy your new computer!!!!
 
Hey guys i just depleted the battery of the mbp and let it slept overnight. I'm charging it right now, and just wondering if using the mbp during this last stage of charging affects the calibration?
 
johnnymg said:
Even calibrated, the 'time remaining' isn't particularly accurate. Just chill out and enjoy your new computer!!!!
Click to expand...

Exactly. I don't bother to calibrate for this reason. I also turn off the time indicator and just leave the battery icon. If the time number is there I pay too much attention to it. The reality is that the battery works well and I'm happy with how long it keeps going.
 
BenXiaoHai said:
Hey guys i just depleted the battery of the mbp and let it slept overnight. I'm charging it right now, and just wondering if using the mbp during this last stage of charging affects the calibration?
Click to expand...

I am wondering the same thing. Can someone help?

I am on my 4hour30minute time frame post mbp going to sleep on its own and pressing the battery indicator makes the last led blink green for 3 seconds or so and then dying out. Does this mean anything? Shouldn't it not respond if the battery is completely drained?
 
You must log in or register to reply here.
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.
Top Bottom
Back