I hate to be the bearer of bad news, but you might be reducing your phone battery's lifespan with certain charging behaviors.
Specifically, if you often charge your phone overnight or keep it plugged in for hours after it's reached 100%, you're accelerating the aging process of lithium-ion smartphone batteries.
"If you're going to charge your phone to 100% and keep it at 100% — just keep on charging and charging overnight — this will have negative influence on aging," Dominik Schulte, the managing director of the German battery-technology consultancy firm BatterieIngenieure, told Business Insider.