AC plug in & Battery % goes down

I notice that even with my ac plugged in, my battery will go from 99% to 95%. Then the ac starts charging to 100%. Is this normal? I thought the MB would be using AC power only if plugged in.
Also: is there harm in disconnecting the magsafe while MB is on? I have installed the battery update, and calibrated battery. Battery cap looks ok (FC 6259, Remaining Cap 6215,cycle count 3)
Thanks in advance
rj

This is normal - your MBP will not try to charge the battery if the current charge is >95%, and depending on usage the AC power is (occasionally) insufficient and the MBP will draw a little from the battery. (In fact, this is why your MBP will actually shut off one of the processor cores if you run on AC without the battery installed, to avoid the hard shutdown that would occur if it could not draw that additional power from the battery.)
Also, be aware that power is used during sleep. I use my MBP on AC at work and home, but it's (obviously) not plugged in during transit. So it will drop from 100% down below 95% over a couple of days, then charge back up.
There's no harm in disconnecting the MagSafe while running - I do this all the time.
Hope this helps...

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Message was edited by: RayCanada

Battery going down every minute.. 2011 MBP.

I have a 15" Pro 2011 (early) i7, 8 GB Ram.
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I have closed everything off, apart from safari. Screen brightness is at 6 blocks.. Even though it tells me I have 3:49 left...
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I just wanted to follow up with an update about the problem I was experiencing. It turns out I bought a wonderful macbook pro with a defective logic board I'm not sure how that gets by quality control, this is my first Mac and needless to say I'm not impressed the computer has been with an authorized Mac reseller and repair place thats still waiting on parts from Apple after 5 days another area I'm not impressed with as they said Apple did not ship parts to Canada this is a brand new computer about two weeks old now. I would recommend to anyone that is having the same problems to take your computer to an authorized apple store or repair depot and get it checked out. Now the question I have is with a problem like that would it have damaged other parts of the computer?
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Message was edited by: RayCanada

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brianbrew wrote:
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http://www.macblend.com/how-to-calibrate-your-mac-iphone-or-ipad-battery/
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http://allthingsd.com/20120327/apple-ipad-battery-nothing-to-get-charged-up-abou t/
Apple Explains New iPad's Continued Charging Beyond 100% Battery Level
http://www.macrumors.com/2012/03/27/apple-explains-new-ipads-continued-charging- beyond-100-battery-level/
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Apple Batteries - iPad http://www.apple.com/batteries/ipad.html
Extend iPad Battery Life (Look at pjl123 comment)
https://discussions.apple.com/thread/3921324?tstart=30
New iPad Slow to Recharge, Barely Charges During Use
http://www.pcworld.com/article/252326/new_ipad_slow_to_recharge_barely_charges_d uring_use.html
Tips About Charging for New iPad 3
http://goodscool-electronics.blogspot.com/2012/04/tips-about-charging-for-new-ip ad-3.html
How to Save and Prolong the battery life of your new ipad
https://discussions.apple.com/thread/4480944?tstart=0
Prolong battery lifespan for iPad / iPad 2 / iPad 3: charging tips
http://thehowto.wikidot.com/prolong-battery-lifespan-for-ipad
iPhone, iPod, Using the iPad Charger
http://support.apple.com/kb/HT4327
Install and use Battery Doctor HD
http://itunes.apple.com/tw/app/battery-doctor-hd/id459702901?mt=8
In rare instances when using the Camera Connection Kit, you may notice that iPad does not charge after using the Camera Connection Kit. Disconnecting and reconnecting the iPad from the charger will resolve this issue.
 Cheers, Tom

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AC plug in & Battery % goes down

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