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Helpful answers
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Jan 9, 2016 7:36 AM in response to Myat Htet Aungby OGELTHORPE,★HelpfulHere is every thing you have ever wanted to know about Mac batteries:
https://support.apple.com/en-us/HT204054
I have two golden rules about a MBP battery.
Yopu may use is connected to AC most of the time, bu at least once monthly, use it under battery power to about the 40% charge level. Lithium ion batteries need occasional 'exercise'.
Deep battery discharges should be avoided. When you see the battery warning, terminate the session and connect to AC. Deep discharges shorten the useful life of a lithium ion battery.
Ciao.
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