Why does my macbook only turn on when the power adapter is plugged in?
The battery life says its at 73% and climbing but whenever I unplug my power adapter the mac automatically shuts down and if I try to turn on the macbook without my power adapter plugged in, it wont turn on. How do I make it go back to where I can turn the mac on without it being plugged in? Thank you for your help!
I would try two things the first being resetting the System Management Controller:
1) If the computer is on, turn it off.
2) Disconnect the AC Adapter and remove the computer's battery.
3) Press and hold down the power button for 5 seconds and then release the button.
4) Reconnect the battery and AC Adapter.
5) Press the Power button to restart the computer.
If that doesn't work I would recalibrate the battery.
To calibrate the battery:
1) Plug in the MagSafe power adapter and fully charge the MacBook or MacBook Pro battery until the light on the MagSafe connector changes to green and the Battery icon in the menu bar indicates that the battery is fully charged.
2) Allow the battery to rest in the fully charged state for two hours or longer. You may use your computer during this time as long as the power adapter is plugged in.
3) Disconnect the power adapter with the computer on and start using it with battery power. When the battery's charge gets low, you’ll see the low battery warning dialog on the screen.
4) Continue to keep your computer turned on until it goes to sleep. Save your work and close all applications when the battery's charge gets low and before the computer goes to sleep.
5) Turn off the computer or allow it to sleep for five hours or longer.
6) Reconnect the power adapter and leave it connected until the battery is fully charged. You may use your computer during this time.
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PCB Lot Code: 0000
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2) Disconnect the AC Adapter and remove the computer's battery.
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Hi!
Got my new macbook pro few months back. At first I loaded battery to full and totally empty about 3 times. Currently it has 14 cycle counts. I mainly use my computer with power adapter plugged in. When I charge it to 100% then afther time passes it goes 99%, 98%, 97%... but all this time my power adapter is plugged in. When I unplug it and run it on battery and then plug power adapter in again and when it reached 100% then again afther time passes and with power adapter still plugged in, it starts to go from 100% to 99..98..97%. At this time I usually unplug it, run it on battery and then again plug it in. Whatever the % when power adapter is plugged in (100%, 99%, 98%, 97%), Time view shows always "charged". I haven't let it drop more that 97% before I unplug it, run it on battery for a while and then plug it in again.
If I let it drop more than 97% (although power adapter is plugged in) will it eventually drop to 0% and time view still shows "charged" ?
All this time I have about 3 word documents open that I'm working on, 1 pdf document open and safari with different dictionaries all at once and time afther time I shearch the internet.
Is that normal with these applications running or not?
Why is that?
My older computer, macbook, when it's power adapter was plugged in, it always showed 100%.
Any word of advice?That is normal behavior. The power will drop several percent before the charge function kicks in. If you leave it on power you'll notice it start to charge somewhere around 96% maybe 95%.
You can just leave it plugged in and it'll take care of itself.
Regards,
Captfred -
It's only 3 months old, I think it's mostly while streaming movies from the net whilst the power supply is plugged in? I have seen a couple of other similar posts. Any thoughts or advice greatly appreciated.
Try a SMC reset.
http://support.apple.com/kb/HT3964 -
I dont know what is wrong with my computer,if is it because there is something wrong with my MacBook Pro or if its the actual power adapter or the string that attatches the power adapter and the computer. HELP PLEASE!!!
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Welcome to the Support Communities!
The article below may be able to help you with this. Click on the link to see more details and screenshots.
iPod nano: Charging the battery
http://support.apple.com/kb/ht3215
Restoring iPod to factory settings
http://support.apple.com/kb/ht1339
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