Why is My Mac Draining Battery While Sleeping?

  • 21 October 2021
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Some MacBook Pro, MacBook Air, and MacBook users may have noticed their computers are draining battery even when the Mac is sleeping and not in use. This seems like a peculiar issue, but it turns out there there may be an explanation.

A simple way to diagnose this issue is by going to  Apple menu > System Preferences > Battery, then choosing “Usage History”. When you see the battery level drop but the ‘Screen On Usage’ is nonexistent, you know the battery is draining when the Mac is not in use. The screenshot above demonstrates this in a severe case, where a MacBook Air drained the entire battery when not in use.

 

Usually this happens because the Mac is not actually sleeping, the screen is just off, or the Mac is being woken up. Or, a feature called Power Nap is turned on the Mac laptop. Let’s look into this.

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