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,…