My macbook pro 13 (late 2012) 2.9 GHZ is taking excessive time to recharge

Question

My macbook pro 13 (late 2012) 2.9 GHZ is taking excessive time to recharge

Hello there,

I got my Macbook Pro just a couple of months ago. It is the late 2012 Macbook Pro (not retina) with 2.9 Ghz. I really liked it. But lately it has been taking too long to recharge it's battery about 2:15 to recharge from 0% to 100%! Is this normal?

I have tried PRAM and SMC both. But.......

My brightness is less than half and I don't use heavy apps. Most of the time I only browse.

Here is a snapshot to prove it:

Mac OS X (10.2.x)

Posted on Mar 9, 2013 10:32 AM

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Answer 1

stedman1

Level 10

264,490 points

Mar 9, 2013 10:34 AM in response to Akidwithgreatambition

Sounds about normal.

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Answer 2

Mar 9, 2013 10:50 AM in response to stedman1

Now at 72% done, it takes about 1:30 to full. I mean is this really normal?

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Answer 3

Mar 9, 2013 10:55 AM in response to Akidwithgreatambition

When you are running, most of the power is used to run the machine. If you want it to charge faster, shut it down (not sleep, shut down).

Your recharge times seem pretty fast to me.

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Answer 4

OGELTHORPE

Level 9

57,329 points

Mar 9, 2013 10:58 AM in response to Akidwithgreatambition

Yes, the last percentiles to get it to 100% will take much longer than the earlier ones. That is the nature of the charging controls. Further more due to the volatile nature of batteries, the time statistics are often unreliable. They can be approximations rather than precise measurements. I suggest NOT to discharge the battery to 0% because that will reduce its life span.

Here are a couple of Apple support articles that you may find informative:

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

http://support.apple.com/kb/ht1446

Ciao.

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Answer 5

Mar 9, 2013 11:10 AM in response to OGELTHORPE

Thanks to all of you 🙂 Also when not using any app but just the Activity Monitor the CPU usage sometimes jumps a little bit is that okay? like this :

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Answer 6

Mar 9, 2013 11:22 AM in response to Akidwithgreatambition

If you take a hard look with Activity Monitor, you will observe a number of interesting things about Mac OS X.

• In general, far more Virtual Memory has been committed than can possibly fit in all the Real memory you have in your Mac.

• Tasks will suddenly use a burst of CPU for no apparent reason.

• I/O is happening even when your Mac seems "idle".

• Things are getting paged into memory all the time.

These are all attributes of a complex, virtual memory-based Operating System (Mac OS X running on its unix kernel).

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