I used to put the battery of my old MBP under charge when it dropped under 40%.
Now, on the NET, I read that, with this new generation of MBBAir, the power adapter may stay always plugged-in confortably: They say that even Apple says this will not harm the battery in any way; nor will it harm the life-cycles of the battery itself.
So, what’d be your recommendations? When working, always under charge? Or only when battery level is below 40 %?
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