Battery health
Can battery health be extended by keeping the iPhone plugged in whenever possible?
Conversely, will keeping my phone plugged in while I sleep shorten battery lifespan by overheating?
The battery health percentage will never increase.. (unless you have an iPhone 11 and have not updated to iOS 14, it's possible that it does)
You should absolutely keep your iPhone plugged in overnight, it will not shorten the battery's life.
