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Old Jan 7, 2011, 01:39 PM   #1
Rooskibar03
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Battery only charges to 99%?

I've had my 11" ultimate for about 3 weeks. Its mostly used by the wife around the house so I never really noticed before that the battery never charges to 100%.

I'll leave it plugged in overnight. Open it up and it tells me it charged, however as soon as I unplug the cord it reads 99%.

Does anyone ever see 100%? I know it really has no bearing on battery life, which is great on this machine, but all my previous laptops have said 100% when fully charged?
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Old Jan 7, 2011, 01:42 PM   #2
Hellhammer
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Quote:
CHARGING
It is also normal that your battery may not charge to 100%. The battery may appear to stop charging between 93 percent and 99 percent, because the batteries are designed to avoid short discharge/charge cycles in order to prolong the overall life of the battery. When it reaches a full charge, the light on your MagSafe adapter will turn green. This indicates that it has stopped charging your battery and you are now running on A/C power with a fully charged battery. It will not overcharge your battery. It's also perfectly safe to let your Mac notebook sleep with A/C plugged in.
Apple Portables: Battery may not show a full charge in Mac OS X
If you have problems with charging, this might help:
Apple Portables: Troubleshooting MagSafe adapters
Intel-based Macs: Resetting the System Management Controller (SMC)
http://forums.macrumors.com/showpost...2&postcount=23
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Old Jan 7, 2011, 02:24 PM   #3
crazyyankeefan
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Also one small note, there's really no point to get obsessed with this "100% charge". In fact, for a Li-ion type of battery, the battery will last the longest if it's always used within 30-70% range. When it stays completely drained or maximum charged over a period of time, it's when the battery gets damaged the most.
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Old Jan 7, 2011, 04:30 PM   #4
Rooskibar03
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Originally Posted by Hellhammer View Post
See even after calibration I still don't see 100%. But again, not the end of the world for me. Still love the machine.
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Old May 13, 2014, 09:34 AM   #5
aydensuzzivan
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Quote:
Originally Posted by Rooskibar03 View Post
I've had my 11" ultimate for about 3 weeks. Its mostly used by the wife around the house so I never really noticed before that the battery never charges to 100%.

I'll leave it plugged in overnight. Open it up and it tells me it charged, however as soon as I unplug the cord it reads 99%.

Does anyone ever see 100%? I know it really has no bearing on battery life, which is great on this machine, but all my previous laptops have said 100% when fully charged?
Same issue with my brand new iPhone 5S.
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Old May 13, 2014, 11:53 AM   #6
Meister
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You can check your batteries state under:
--> about this mac --> system report --> power
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Old May 13, 2014, 01:29 PM   #7
aydensuzzivan
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Originally Posted by Meister View Post
You can check your batteries state under:
--> about this mac --> system report --> power
I'm aware of that. It was not the focus of this discussion or my post.
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Old May 13, 2014, 02:04 PM   #8
Meister
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Originally Posted by aydensuzzivan View Post
I'm aware of that. It was not the focus of this discussion or my post.
Your question was about your batteries status. What percentage it shows is irrelevant.

If you know where to look at your battery status then I have no idea what this thread is about.
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Old May 13, 2014, 08:51 PM   #9
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If you leave it plugged in all the time, it will show 100% (because it stopped charging), but the battery is slowly discharging over time. I think it has to drop to 96% before it goes back into charging mode. If it kept trying to charge it every time it was less than 100%, the battery would be shot very quickly.
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