Yes, charging your phone overnight is bad for its battery. And no, you don’t need to turn off your device to give the battery a break. Here’s why.
https://www.wired.com/story/how-to-improve-battery-life-tips-myths-smartphones/?utm_source=dlvr.it&utm_medium=blogger
https://www.wired.com/story/how-to-improve-battery-life-tips-myths-smartphones/?utm_source=dlvr.it&utm_medium=blogger