Red rice K40 charging heat is a normal phenomenon, because the charging process involves the transmission of current and voltage, these energy into heat will cause the mobile phone to heat to a certain extent.
In addition, the Redmi K40 uses 40W wired charging and 33W wireless charging technology, in order to ensure charging efficiency, the phone needs to invest a lot of energy to complete the charging process, so the heat will also increase.
Users can try to reduce the use of the phone while charging, close some applications, and ensure that the charger and data cable are of good quality to ensure a safe and stable charging effect.
The Redmi k40 uses fast-charge technology, which generates heat from the battery while charging, while the charger heats up. In addition, the phone's processor and other circuits also generate heat due to high current charging. If unofficial or incompatible chargers are used, overheating and safety risks may result. It is recommended to choose the original charger and avoid thickening the phone's case\/protective case and other items while charging to allow adequate heat dissipation. At the same time, if you find that the phone exceeds the normal temperature range when charging, you should stop charging and check whether there is a problem.
This is not an isolated phenomenon of the Redrice k40
Yes, all cell phones heat up when charged
It is not recommended to use the phone while charging