Battery charging on Macbook pro C2D:

[Mr. A]

Hi,

I have been using my amazing 15inch 2.33 with glossy screen for over a week now and it is awesome. I just noticed today that when I plug in the power adapter, the battery remains at 98% and does not go to 10%. The first 1-2 days, I remember seeing 100% but today, it remains on 98% and it doesnt even show that it is charging. if I choose the setting time, it shows charged but if I change the setting to percentage, it shows 98% and the icon shows plugged in and not charging. Is anyone else seeing it happen? Any ideas to how to fix this?

Thanks.

[gwoodpecker]

This is perfectly normal. To avoid too many charging cycles, your MacBook Pro will only start recharging the battery once the level falls below 95%. So whenever it falls below, it will be charged again to 100%.

http://www.apple.com/batteries/notebooks.html

Edit: Or do you mean your notebook is not charging at all when the level is 10%? (or was that a typo?)

[Mr. A]

This is perfectly normal. To avoid too many charging cycles, your MacBook Pro will only start recharging the battery once the level falls below 95%. So whenever it falls below, it will be charged again to 100%.

http://www.apple.com/batteries/notebooks.html

Edit: Or do you mean your notebook is not charging at all when the level is 10%? (or was that a typo?)

Thanks for the response..It is charging, I just didn't know that it doesn't start unless it is less than 95%...I guess, 1 question is that why does it remain on 98% though. It was low, then it started charging, got charged till 98%. Just curious.

[gwoodpecker]

Ah, I see. You will have to do a so-called calibration cycle once in a while:
http://docs.info.apple.com/article.html?artnum=86284

And also perhaps a PMU reset first:
http://docs.info.apple.com/article.html?artnum=303319

Then your MBP will fully charge up to 100% again.