MacBook says it is fully charged at 99%

brianfast · Jun 13, 2010, 12:09 PM

My MacBook, "2 days old", from when I purchased it at the apple store says it is fully charged at 99% battery. I just re calibrated the battery last boot. Is this normal?

scaredpoet · Jun 13, 2010, 12:14 PM

Yes it is. Your mac will not charge the battery again unless it drops below 95%. anything 95% and above is considered "fully charged."

This is to help prevent premature aging of the battery. There's little point or benefit gained from constantly cycling a battery every time it drops to 99%.

spinnerlys · Jun 13, 2010, 12:14 PM

Yes. It will say that often between 95% and 99% percent.

If you use MRoogle you will find one or two hundred threads about this.

GGJstudios · Jun 13, 2010, 12:15 PM

This will answer most of your battery questions:

Apple Notebook Battery FAQ

Azure571 · Jun 13, 2010, 12:28 PM

I had the exact same problem this morning with a new MBP that I just got yesterday

I tried unplugging the power cord and letting it run down to 98, 97, 96, to no avail. Then I let the battery run down to sub-90 and bam, it worked.

But hey, at least I know why now haha. I guess next time 95 will be the magic number.

snberk103 · Jun 13, 2010, 12:50 PM

Quote:

Originally Posted by Azure571

I had the exact same problem this morning with a new MBP that I just got yesterday

I tried unplugging the power cord and letting it run down to 98, 97, 96, to no avail. Then I let the battery run down to sub-90 and bam, it worked.

But hey, at least I know why now haha. I guess next time 95 will be the magic number.

Just to nitpick slightly.... but it's not really a "problem" if it was designed that way, and if it actually improves the life-span of the battery.

scaredpoet · Jun 13, 2010, 01:42 PM

Not only is it not a "problem," but you're not really solving anything by forcing the battery to run down a little bit only to charge it right back up. You're just defeating a feature that was intended to prolong the life of the battery.

Just use the battery normally, and if you're constantly plugged in, be sure to run the battery FULLY down (or close to it at least) once a month.

pilotkid · 02:02 PM

I purchased my MBP from a local Apple Store about a week ago. I have done a full battery calibration twice since then. Now my capacity is actually reading over what its suppose to...thats fine with me!

***Sorry about the image size. I originally made it half this size but you couldn't read anything on the screen...***

Mod note: I've timged the image. Click on it for a larger version.

spinnerlys · Jun 13, 2010, 08:43 PM

Quote:

Originally Posted by pilotkid

I purchased my MBP from a local Apple Store about a week ago. I have done a full battery calibration twice since then. Now my capacity is actually reading over what its suppose to...thats fine with me!

***Sorry about the image size. I originally made it half this size but you couldn't read anything on the screen...***

You can use CMD+SHIFT+4 to select the area you want to be shot

or use CMD+SHIFT+4 > SPACEBAR > select window to make a screenshot of a window you select.

In both cases the image is being saved to the Desktop as .png file.

djasterix · Jun 13, 2010, 08:44 PM

That's normal, don't panic about that...

Libertine Lush · Jun 14, 2010, 01:21 AM

Mine is much the same. Steady at 99%.

cys920622 · Jun 14, 2010, 02:17 AM

Let your mbp battery drop below 80%. Plug it back in. It will charge back up to 100%.

Fishrrman · Jun 14, 2010, 08:47 AM

99% vis-a-vis 100%?

How many things in life have you discovered that proved to be 100%?

As you recall that, then ask yourself, "in view of that, is 99% all that bad?"

Just askin'....

Jun 13, 2010, 12:09 PM	#1
brianfast macrumors regular Join Date: Jun 2010	MacBook says it is fully charged at 99% My MacBook, "2 days old", from when I purchased it at the apple store says it is fully charged at 99% battery. I just re calibrated the battery last boot. Is this normal? Attached Thumbnails
	0

Jun 13, 2010, 12:14 PM	#2
scaredpoet macrumors 68040 Join Date: Apr 2007	Yes it is. Your mac will not charge the battery again unless it drops below 95%. anything 95% and above is considered "fully charged." This is to help prevent premature aging of the battery. There's little point or benefit gained from constantly cycling a battery every time it drops to 99%. __________________ If you're not a clairvoyant, then you shouldn't be speaking for a dead guy. The Apple "QC cycle," explained. Slow data, fewer bars? No, you don't have a bad SIM.
	0

Jun 13, 2010, 12:28 PM	#5
Azure571 macrumors newbie Join Date: Apr 2010	I had the exact same problem this morning with a new MBP that I just got yesterday I tried unplugging the power cord and letting it run down to 98, 97, 96, to no avail. Then I let the battery run down to sub-90 and bam, it worked. But hey, at least I know why now haha. I guess next time 95 will be the magic number. __________________ Macbook Pro 13" 2.4Ghz iPhone 4 32GB iPhone 3GS 32GB
	0

Jun 13, 2010, 01:42 PM	#7
scaredpoet macrumors 68040 Join Date: Apr 2007	Not only is it not a "problem," but you're not really solving anything by forcing the battery to run down a little bit only to charge it right back up. You're just defeating a feature that was intended to prolong the life of the battery. Just use the battery normally, and if you're constantly plugged in, be sure to run the battery FULLY down (or close to it at least) once a month. __________________ If you're not a clairvoyant, then you shouldn't be speaking for a dead guy. The Apple "QC cycle," explained. Slow data, fewer bars? No, you don't have a bad SIM.
	0

Jun 13, 2010, 08:34 PM	#8
pilotkid macrumors 6502a Join Date: Aug 2006 Location: Chandler, AZ/Chicago, IL	I purchased my MBP from a local Apple Store about a week ago. I have done a full battery calibration twice since then. Now my capacity is actually reading over what its suppose to...thats fine with me! *Sorry about the image size. I originally made it half this size but you couldn't read anything on the screen...* Mod note: I've timged the image. Click on it for a larger version. __________________ 11" MacBook Air (2012), Samsung Galaxy Note II. Last edited by annk; Jun 14, 2010 at 02:02 PM.
	0

Jun 13, 2010, 12:14 PM	#3
spinnerlys Guest Join Date: Sep 2008 Location: forlod bygningen	Yes. It will say that often between 95% and 99% percent. If you use MRoogle you will find one or two hundred threads about this.
	0

Jun 13, 2010, 12:15 PM	#4
GGJstudios macrumors Westmere Join Date: May 2008	This will answer most of your battery questions: Apple Notebook Battery FAQ
	0

Jun 13, 2010, 08:44 PM	#10
djasterix macrumors 6502a Join Date: Apr 2010 Location: Paradise City	That's normal, don't panic about that... __________________ 15" i5 2,4GHz Unibody MacBook Pro, 320 GB, 4GB RAM 8Gb iPhone 3g iOS4
	0

Jun 14, 2010, 01:21 AM	#11
Libertine Lush macrumors 6502a Join Date: Nov 2009	Mine is much the same. Steady at 99%.
	0

Jun 14, 2010, 02:17 AM	#12
cys920622 macrumors member Join Date: Feb 2010	Let your mbp battery drop below 80%. Plug it back in. It will charge back up to 100%.
	0

Jun 14, 2010, 08:47 AM	#13
Fishrrman macrumors 68020 Join Date: Feb 2009	99% vis-a-vis 100%? How many things in life have you discovered that proved to be 100%? As you recall that, then ask yourself, "in view of that, is 99% all that bad?" Just askin'....
	0

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Similar Threads
thread	Thread Starter	Forum	Replies	Last Post
MacBook says it is plugged in and "(Not Charging)" while unplugged	Atephore	MacBook	20	May 9, 2013 11:50 PM
Just received my macbook pro 15", I fully charged it: Says 3 hrs 25 mins remaining?	SethRogen	MacBook Pro	9	Nov 8, 2011 11:15 PM
battery says fully charged at 97%?	Sossity	MacBook Pro	1	Jun 25, 2010 04:31 PM
New MacBook Pro fully charged at 99%?	Aquaman09	MacBook Pro	10	Jul 17, 2008 07:37 AM
PB fully charged at 99%?	inlimbo	Macintosh Computers	3	Feb 24, 2005 07:40 PM