What are the reasons why the battery cannot be charged?

[DeJasmine]

The reasons why the battery cannot be charged include charging equipment failure, unsuitable charging environment, loose connection between the power cord and battery socket, and the battery itself having zero voltage or being unqualified. The specific details are as follows: Charging equipment failure: Charging equipment failure, with no output voltage. In this case, simply place the battery on another charger of the same model for charging. Charging environment: Unsuitable charging environment. Both the charger and rechargeable battery have operating conditions. Exceeding any of the specified limits, whether high or low temperature, will prevent charging. Poor contact: Loose connection or poor contact between the power cord and battery socket. Reconnect the socket. Unqualified product: Battery with zero voltage or a battery pack containing a zero-voltage battery. A battery with zero voltage is either an unqualified product that did not meet the nominal capacity and voltage values when leaving the factory.