Can you have too much charge?
I normally leave my iPhone 5c plugged into the mains charger during the day and overnight, only unplugging it when I actually go out. Is there a risk of overcharging it this way? Should I let the battery run down now and again? Stuart Brookes The mains adapter will protect it from overcharging, but keeping your battery permanently at full charge will reduce its total capacity by about 20% each year. A good compromise is to charge it overnight and let it run from the battery during the day.