The mobile phone charger you inquire about is hot during charging, the charger has alternating currents in the work, and it will be slightly hot, which is a normal phenomenon. If the charger is particularly hot during the charging process, it is abnormal, you can first check whether the original mobile phone charger is used, if the original charger is very hot in use, the temperature is very high, it is recommended that you take the purchase invoice, repair card and mobile phone to the local Samsung after-sales service center, by professional engineers to help you detect.