Multiple safety features protect the charger and your phone or device being charged: 1. Overcharge protection prevents overcharging of the battery; 2 Overcurrent protection prevents excessive battery current; 3 Overdischarge protection protects the battery; 4 Short circuit protection; 5. Overvoltage protection prevents too high battery voltage for the battery; 6. Over power protection; Automatic reset if short circuit is detected; and 7. Temperature control protection protects the battery.