I've never had that pop up show on my Samsung phone's to be honest and I charge my phone overnight to 100%, albeit with the phone turned off and try not to let my phone drop below 15%
I'm guessing it maybe a one off pop up !
This is Samsungs official advice on charging the battery.
Daily Driver > Samsung Galaxy s²² Ultra 256Gb in Phantom Black.
The advice I offer is my own and does not represent Samsung’s position.
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