Here are several possible reasons why the car charger cannot charge properly:
1. There is a problem with the connection between the car charger and the external power supply, such as poor contact, which will cause the current to not be transmitted smoothly, and thus charging cannot be performed.
2. The voltage of the car charger itself may be lower than the required threshold and cannot meet the voltage requirements of the charging device. As a result, it cannot provide enough power to the device, resulting in charging failure.
3. When the voltage provided by the car charger is unstable, the battery protection mechanism built into the charging device may automatically disconnect to avoid damage to the device, which will also cause the charging process to fail. As for the inability of the charger on the car to charge properly, in addition to the above-mentioned voltage instability problem, it may also involve factors such as the mismatch between the parameter settings of the charger itself and the vehicle power supply, or the aging of the internal components of the charger.
Ensuring the correct connection and adaptation of the charger, as well as regular inspection and maintenance, are important steps to ensure its normal operation.