Does it harm my macbook pro retina 13'' (2015) battery to keep it connected to the wall socket even after it is fully charged?

Should I disconnect the charger after the battery percentage reaches 100% or is it ok to use it after it reached 100%? Also, what is the minimum battery percentage before I start charging again? Is it bad to completely drain the battery sometimes (twice in a month)? I am sorry for the question for being so long, but I really want to optimise my mac battery. Thanks for the help in advance.

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1 Answer from the Community

  • Yes, Leaving any laptop plugged in continuously will shorten the battery life and actually kill the battery.

    My wife left her MBP plugged all the time. Eventually she could no longer use it without it being plugged in.
    She left it plugged in and eventually the battery expanded & warped the case & made the touch pad unusable.

    Luckily it was less than 5 years old & Apple replaced the battery and fixed touch pad & case for the cost of the battery $140

    I have heard letting run down to 10% is good. I don't know about total discharge.

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