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99% battery

Usually calibrating fixes it for me. But does that 1% of battery actually matter to you? Thats gotta be only a couple minutes more of run time. :rolleyes:
 
Warranty Voider said:
Usually calibrating fixes it for me. But does that 1% of battery actually matter to you? Thats gotta be only a couple minutes more of run time. :rolleyes:
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it's not that. i read on battery university that if this is happening on a li-ion battery that it means that the power adaptor is "cooking" the battery. basically when the computer knows that the battery is at 100% it lessens the output from the adaptor. i dunno, maybe i am just being paranoid haha.
 
It stops charging at 100%. It will begin charging again when it drops to 95%. It does this to prevent overcharging.

If you think you have a problem then reset the SMC by shutting down, unplugging the AC, taking out the battery, and holding down the power for five seconds. You should also fully calibrate by charging fully and leaving charged for two hours, discharging fully and leaving discharged for five hours, and then fully charging. Calibrate every 2 months for best accuracy.
 
ViciousShadow21 said:
huh didnt know that. that's a good feature.

i did reset the SMC and did a calibration about 2 days ago so i know it's no that. but i think you solved it. thanks.
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He's right but its not to prevent overcharging, thats wrong. Its because your power adaptor cant always provide all the power your Macbook Pro needs, so sometimes it draws power from both the magsafe adaptor and the battery, especially during performing CPU instensive tasks, such as any video work, gaming or watching flash videos (youtube etc) online, and then when it drops to 95% it starts charging the battery again. This is well documented on the Apple support site, and is why you should never remove your battery and run your Macbook Pro simply from the power adaptor. If you do that you'll underclock the processor by 50%, and shut down one processor core.
 
kastenbrust said:
He's right but its not to prevent overcharging, thats wrong. Its because your power adaptor cant always provide all the power your Macbook Pro needs, so sometimes it draws power from both the magsafe adaptor and the battery, especially during performing CPU instensive tasks, such as any video work, gaming or watching flash videos (youtube etc) online, and then when it drops to 95% it starts charging the battery again. This is well documented on the Apple support site, and is why you should never remove your battery and run your Macbook Pro simply from the power adaptor. If you do that you'll underclock the processor by 50%, and shut down one processor core.
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If I'm wrong then what Apple says about the issue is also wrong. They say it is to prolong the lifespan of the battery. It is all about heat when it gets near 100%. Read the kb article. I'm not saying you are incorrect about the computer needing more power than the magsafe can offer because that is also true. But that is not just between 95-100%.
 
Mine only goes up to 99% too. Never really bothered me. I wouldn't worry too much about it
 
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