More importantly, damaged, counterfeit, or poor-quality chargers may become unusually hot while connected to power. Worn cables, loose outlets, or internal faults can increase the risk of overheating, melting, sparks, or electrical problems.
Leaving a charger powered continuously may also place gradual wear on its internal components. It is safer to use certified chargers, keep them away from beds and other flammable materials, and replace any charger that becomes cracked, loose, or excessively hot.
Unplugging a charger when you are finished using it is a simple precaution that can reduce standby electricity use and remove a potential electrical hazard. Modern quality chargers are generally designed to remain plugged in safely, but damaged or low-quality equipment should never be ignored.
