Just in case there was any doubt, you don’t have to worry about charging your smartphone when it’s already fully charged.

For years, the myth has persisted that plugging your smartphone in to charge while you sleep will harm the phone’s battery. Though many people do it anyway, others warn that charging a phone that is already fully charged will waste its battery’s capacity.

But while those fears may have made sense with the batteries of years ago, they’re overblown today.

Source: Yes, it’s safe to leave your smartphone charging overnight – Business Insider