Sony WH-CH710N Checking the remaining battery charge when you are using an Android™ smartphone (OS 8.1 or later)

When you are using an Android™ smartphone (OS 8.1 or later)

When the headset is connected to an Android smartphone via HFP Bluetooth connection, select [Settings] - [Device connection] - [Bluetooth] to display the remaining battery charge of the headset where the paired Bluetooth device is displayed on the smartphone’s screen. It is displayed as “100%”, “70%”, “50%”, or “20%”. For details, refer to the operating instructions of the Android smartphone.

The remaining charge which is displayed may differ from the actual remaining charge in some cases. Please use it as a rough estimate.

Note

• If you connect the headset to an iPhone/iPod touch or Android smartphone with “Media audio” (A2DP) only in a multipoint connection, the remaining battery charge will not be displayed correctly.
• The remaining battery charge may not be properly displayed if the headset has not been used for a long time. In this case, repeatedly charge and discharge the battery multiple times to properly display the remaining battery charge.

https://helpguide.sony.net/