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Apple Computing Products:
macOS - Notebook Hardware
MacBook air 2010 shuts down after unplug
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<blockquote data-quote="krs" data-source="post: 1841246" data-attributes="member: 67742"><p>I powered up an old 2011 MacBook pro I have lying around gathering dust.</p><p></p><p>Two things struck me looking at your battery information:</p><p></p><p>1. The reported voltage is only 8321 mV, on my MBpro it shows 9616mV - so that is more than 1 volt less.</p><p>Maybe that is not an issue - I don't know off hand what it needs to be.</p><p></p><p>However, the second item:</p><p>The amperage shows at 0 milliamp. I assume that measurement is what is being drawn from the battery by the Mac at this point of time.</p><p>So the battery contributes no power to the Mac since I assume you have it plugged in when you took this screen shot.</p><p>When I run the MBp with the power cord plugged in, the amperage for me shows 159 milliamps</p><p></p><p>Maybe others can add their comments on what the battery readings should be, but to me the ones you are getting don't sound right.</p><p>My readings are on a late 2011 MBp - maybe someone has the same 2010 MBa and can check the voltage/current reading on theirs for comparison</p><p></p><p>It's also possible that the 3rd party charger created part of the problem in not charging the battery to the full voltage and that's why you see the readings you get.</p></blockquote><p></p>
[QUOTE="krs, post: 1841246, member: 67742"] I powered up an old 2011 MacBook pro I have lying around gathering dust. Two things struck me looking at your battery information: 1. The reported voltage is only 8321 mV, on my MBpro it shows 9616mV - so that is more than 1 volt less. Maybe that is not an issue - I don't know off hand what it needs to be. However, the second item: The amperage shows at 0 milliamp. I assume that measurement is what is being drawn from the battery by the Mac at this point of time. So the battery contributes no power to the Mac since I assume you have it plugged in when you took this screen shot. When I run the MBp with the power cord plugged in, the amperage for me shows 159 milliamps Maybe others can add their comments on what the battery readings should be, but to me the ones you are getting don't sound right. My readings are on a late 2011 MBp - maybe someone has the same 2010 MBa and can check the voltage/current reading on theirs for comparison It's also possible that the 3rd party charger created part of the problem in not charging the battery to the full voltage and that's why you see the readings you get. [/QUOTE]
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Apple Computing Products:
macOS - Notebook Hardware
MacBook air 2010 shuts down after unplug
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