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Level 1

13 points

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When my battery reaches about 40%, my MB Air shuts down.

What causes that?

Fixable?

Thanks

MacBook Pro

Posted on Mar 5, 2018 8:31 AM

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Level 10

148,321 points

Mar 5, 2018 9:51 AM in response to gwesq

What can cause that is a faulty battery ... or a faulty MagSafe adapter.

Take a look at the following articles to see if they can help:

Maximizing Battery Life and Lifespan - Apple
Determine battery cycle count for Mac notebooks - Apple Support
About Mac notebook batteries - Apple Support
Mac Service and Repair - Apple Support
Apple Portables: Troubleshooting MagSafe adapters- Apple Support

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