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View Full Version : Mountain Lion shows 99% battery even if fully charged




RichardF
Aug 4, 2012, 08:45 PM
Anyone else?

Did a clean install of ML and now the battery is stuck at 99% even when fully charged.

Also, does anyone know how to properly move the files/ folder of Mail.
Having done a clean install and without having opened Mail or set up account in Settings > Mail, Contacts & Calendars - I would like to copy everything I need to get Mail the way it was in 10.7.4 prior to my clean install of ML.

Thank you in advance.



Arelunde
Aug 4, 2012, 08:49 PM
Yep. I have my MacBook Pro 13 (late 2011) plugged in all the time and the battery always says 99%. Who knows why.

wassal43
Aug 4, 2012, 08:50 PM
suffer the same in lion and mountain lion alike

mrapplegate
Aug 4, 2012, 09:04 PM
Did you calibrate it lately ?
http://support.apple.com/kb/HT1490?viewlocale=en_US&locale=en_US

GGJstudios
Aug 4, 2012, 09:07 PM
Did a clean install of ML and now the battery is stuck at 99% even when fully charged.
It's normal that your battery may stop charging between 93-99%. For details, read the CHARGING section of the following link. This should answer most, if not all, of your battery/charging questions:
Apple Notebook Battery FAQ (http://forums.macrumors.com/showpost.php?p=9875442&postcount=23)
Did you calibrate it lately ?
The built-in batteries in the newer Mac unibody notebooks come pre-calibrated and do not require regular calibration (http://support.apple.com/kb/HT1490) like the removable batteries in older Apple notebooks.

mrapplegate
Aug 4, 2012, 09:09 PM
It's normal that your battery may stop charging between 93-99%. For details, read the CHARGING section of the following link. This should answer most, if not all, of your battery/charging questions:
Apple Notebook Battery FAQ (http://forums.macrumors.com/showpost.php?p=9875442&postcount=23)

The built-in batteries in the newer Mac unibody notebooks come pre-calibrated and do not require regular calibration (http://support.apple.com/kb/HT1490) like the removable batteries in older Apple notebooks.

Oops, missed his computer in the signature.

RichardF
Aug 4, 2012, 11:17 PM
Thank you guys.

I unplugged my MBA and used it down to about 60%. Not fully charged and it does show 100%. All is well.

Any ideas on how to copy over the files/ folders Mail needs? Please my OP.

Icy1007
Aug 4, 2012, 11:18 PM
This is not a ML issue. All versions of OS X I've used have done this from time to time.

My battery is showing as 98%, but it is fully charged.

fins831
Aug 5, 2012, 01:58 AM
It's normal that your battery may stop charging between 93-99%. For details, read the CHARGING section of the following link. This should answer most, if not all, of your battery/charging questions:
Apple Notebook Battery FAQ (http://forums.macrumors.com/showpost.php?p=9875442&postcount=23)

The built-in batteries in the newer Mac unibody notebooks come pre-calibrated and do not require regular calibration (http://support.apple.com/kb/HT1490) like the removable batteries in older Apple notebooks.

I feel like this guy has posted this 100 times this week...is it just me?

GGJstudios
Aug 5, 2012, 02:01 AM
I feel like this guy has posted this 100 times this week...is it just me?
Only as many times as people ask the questions, sometimes less (I don't answer them all.)

-MRB
Aug 5, 2012, 03:15 AM
Did you calibrate it lately ?
http://support.apple.com/kb/HT1490?viewlocale=en_US&locale=en_US

You don't need to calibrate the battery.


The battery needs to be ran down a certain percentage before it will charge to 100%.

GGJstudios
Aug 5, 2012, 03:17 AM
You don't need to calibrate the battery.


The battery needs to be ran down a certain percentage before it will charge to 100%.
See post #5 for details.

Sohailt00
Aug 5, 2012, 03:27 AM
PLEASE! It's just full! And just 1% won't matter! Btw maybe the max for the macbook is 99%?

http://support.apple.com/kb/TS1909

Hope this helps :)

GGJstudios
Aug 5, 2012, 03:28 AM
PLEASE! It's just full! And just 1% won't matter! Btw maybe the max for the macbook is 99%?
No, 99% is not the max. See post #5.

LastMinuteMike
Aug 5, 2012, 04:58 AM
FOR GODS SAKE!

Stop asking this! It's been discussed so many times, there are several articles on the subject!

It has always been this way and the reason for it is that its not good for the battery too be fully charged, so Apple has an algorithm which stops the battery from being charged to the max. Try making a search for the article, it explains it very well.

Long story short, its not a bug, its supposed to be like this, and it always has been.

Icy1007
Aug 5, 2012, 05:07 AM
No, 99% is not the max. See post #5.

It's still full.