1. Battery is exhausted: First, you need to confirm whether it is fully charged. If the battery is exhausted, you need to connect it to the power supply for a while and then try again.
2. Failure of charging cable or adapter: Check whether the charging cable and adapter are damaged, such as disconnection or adapter failure. Try replacing the charging cable and adapter to see if it can be charged normally.
3. Equipment failure: If you have tried charging, but the battery still shows 0, it may be that the equipment itself is faulty. In this case, it is recommended to contact after-sales service or professional maintenance personnel for further diagnosis and treatment.
Please note that the above are some common reasons and possible solutions. The specific treatment methods may be different due to factors such as equipment model and fault type. Before trying any maintenance, it is recommended to refer to the user manual of the equipment or contact after-sales customer service for more accurate and professional support.