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Why Charging Your Gadgets Over 80% Is Such a Bad Idea | iFixit News
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This is a most excellent place for technology news and articles.
Samsung has this option, called Battery Protect I think. There's also the Accubattery app which will set an alarm to go off once it reaches 80 pct. I'm with you though, unless the phone itself shuts off charging, it's too much to manage even with an alarm.
S23 Ultra: Protect Battery - 85 percent toggle
I tried it before but my anxiety was always going . Thinking to try again.