A.
Have you tried using the charging cable that was enclosed with the package, or a normal USB-A type charger?
Once it is connected properly, the display will turn on and indicates that it is charging.
Please kindly use the enclosed power cable with a 5V 2A power outlet to charge the device.
Also, If the device is too cold or too hot, charging may not work properly.
Please charge the device in an environment where the temperature is between 18°C(64°F) and 45°C(113°F).