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100% Battery to 97% instantly???

serialtoon

serialtoon

macrumors 6502a
Original poster
Jul 1, 2009
651
153
1 of 8 bits
So i charged my battery to 100% and then unplugged it from the charger. Thats when the battery dipped to 97% instantaneously. It was very odd and somewhat scary. I just bought this MBP 2 days ago! Anything i might be missing? Is it supposed to do that?
 
It might not be normal, but the battery capacity reader is not very exact.

Monitor the behaviour for some days, and if it does change, don't worry.

And don't worry now.


Also have a look at the following links, as the information presented there might be helpful in your future endeavours into Mac OS X and could clear up initial confusion and may even prevent harm to your system or your files.

http://www.apple.com/support/switch101/ - text

http://www.apple.com/findouthow/mac/ - videos

http://www.apple.com/support/mac101/ - text

http://support.apple.com/kb/HT1343-keyboard - shortcuts
 
I think once the charge reaches 100% the charger allows it to dip back to 90% and then charge again to stop over charging the battery.
That is at least what springs to mind immediately, I can't remember where I read it but I'm pretty sure it was on this forum.

Can anyone back my 'facts' up here?
 
DoFoT9 said:
QuickTime X does it out of the box with SL :D

use that
Click to expand...

Why thank you kind sir! I want to document it and post it on YouTube. That way i can show it to the apple people. Last but not least question. If i bought the Macbook at Best Buy can Apple still service it at their stores? Just curious :)
 
serialtoon said:
Why thank you kind sir! I want to document it and post it on YouTube. That way i can show it to the apple people. Last but not least question. If i bought the Macbook at Best Buy can Apple still service it at their stores? Just curious :)
Click to expand...

Yes, you can take it to an Apple Store
 
serialtoon said:
Why thank you kind sir! I want to document it and post it on YouTube. That way i can show it to the apple people. Last but not least question. If i bought the Macbook at Best Buy can Apple still service it at their stores? Just curious :)
Click to expand...

thats ok :D

yea for sure just take it straight in, if it doesnt need any work on it then its free :D

u might have to book in but
 
I really dont think you have a problem, you really should calibrate the battery since it is brand new. That would probably fix it. A reboot would probably fix it, and if not, its nothing to worry about. There are times when my MBP will sit on the charger at 99% and refuse to go to 100%, and times when that doesnt happen.
 
ARF900 said:
I really dont think you have a problem, you really should calibrate the battery since it is brand new. That would probably fix it. A reboot would probably fix it, and if not, its nothing to worry about. There are times when my MBP will sit on the charger at 99% and refuse to go to 100%, and times when that doesnt happen.
Click to expand...
Is there some kind of guide to show me a calibrating technique? Thanks! You guys are pretty darn helpful.
 
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