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Message: <blockquote data-quote="MacInWin" data-source="post: 1935644" data-attributes="member: 396914">Sorry, I don't understand that. The 80% setting is not user-settable, and I didn't see any setting in CoconutBattery to do that, either. So, HOW did you make that setting? And what have you tried to get it back to 100%? Normally, all it takes is to remove the MagSafe for  a while, to use the battery, and then plug it back in and it will resume 100%. But if you manually changed it, that automatic reset may be blocked.As I said, the charging circuitry will automatically move to 80% after the Mac is on external power for about a week, continuously. And then resume 100% if it is OFF power for long enough to reduce the battery to about 70% or so. (That's an estimate, based on what I see, not something published by Apple.)</blockquote>