normal
Will, use the fast charge mobile phone and charger will heat up! iPhone cell phone using fast charge heat obvious; The charger looks at the volume and temperature control performance, like Apple's original 20W charger because of its large size, the heat dissipation effect can also be, not while charging while playing large games, the heat of the charger will not be hot. Apple mobile phone use fast charge heat is normal, do not worry too much, will not cause any additional damage to the battery, rest assured! However, be careful not to use it for a long time in a high temperature environment, which is easy to cause permanent and irreversible damage to the battery and shorten the battery life; iPhone hot to find a way to cool it down, take the phone case, put it on the table, glass, use a radiator, fan blow a blow, etc.