MacBook only charges when fully drained
I know this is old but we are having the same problem. I just wanted anyone else to know that this is not only a damage issue. We haven’t done anything to ours. It will only charge when completely dead. 2015 Macbook Air.
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Liquid damage issues can appear have similar symptoms as yours. Likely different cause!
Let’s get a better view of things, install this gem of an app! CoconutBattery take a snapshot of the apps main window and post it here for us to see Adding images to an existing question
by Dan