It takes a long time to charge the Walkman, or the player does not fully charge

It can take a long time to charge the Walkman® fully, or it may not fully charge if you are using a USB cable other than the cable included with the player.
To avoid this, be sure to check the following:

• Use the USB Type-C™ cable supplied with the Walkman player.
  Note: The average charging time is approximately 4.5 to 5.5 hours, depending on the model. For more specific charging specifications, refer to the Help Guide for your model.
• Charge the Walkman battery at ambient temperature between 5 ℃ 5 °C, and 35 °C (41 ºF to 95 ºF).
  Note: When the inner temperature in the player is high, the player will not fully charge. This is a specification to save the battery life. We recommend charging the player at a moderate temperature to prevent temperature rise.
• When the ambient temperature exceeds the recommended range, a (temperature abnormality icon) appears on the status bar, and charging is forcibly terminated.
• When the Battery Care function is turned on, the maximum charging capacity is limited, and the battery will not fully charge. This is not a malfunction.