Checking the remaining battery charge

You can check the remaining battery charge of the rechargeable batteries in the headset and charging case.

Checking the remaining battery charge of the headset

Check using the voice guidance notification

When the rechargeable battery becomes low, the voice guidance will play in the following cases.

  • When you remove the headset from the charging case
  • When using the headset

When the battery becomes completely empty, an alarm sounds. The voice guidance plays, then the headset automatically turns off.

Check on your smartphone

  • When you are using an iPhone (iOS 13 or later)
    When the headset is connected to an iPhone via an HFP (Hands-free Profile) Bluetooth connection, you can check the remaining battery charge of the headset on an iPhone. For details, refer to the operating instructions supplied with the iPhone.
    The remaining charge which is displayed may differ from the actual remaining charge in some cases. This is a rough estimate.
  • When you are using an Android™ smartphone (OS 8.1 or later)
    When the headset is connected to an Android smartphone via an HFP Bluetooth connection, you can check the remaining battery charge of the headset on the smartphone. For more details, refer to the operating instructions supplied with the Android smartphone.
    The remaining charge which is displayed may differ from the actual remaining charge in some cases. This is a rough estimate.

Checking the remaining battery charge of the charging case

When both headset units are removed from the charging case, or when the charging case lid is opened or closed with no headset units stored, you can check the remaining battery charge of the charging case.

  • The indicator on the charging case repeatedly flashes slowly in orange 3 times.
    The remaining battery charge of the charging case is about 30% to 1%. The headset cannot be charged sufficiently with the charging case in this case.
  • The indicator on the charging case does not light up.
    The remaining battery charge of the charging case is less than 1%. The headset cannot be charged with the charging case in this case.

Hint

  • The remaining battery charge of the headset may be different on the left and right sides depending on how you use them.
    The remaining battery charge displayed on the smartphone is as follows.
    • When using both headset units, the remaining battery charge of the unit with less battery charge is displayed.
    • When using only one headset unit, the remaining battery charge of the unit in use is displayed.
  • You can also check the remaining battery charge of the headset unit and the charging case with the “Sound Connect” app. Android smartphones and iPhone both support this app.

Note

  • If the headset and smartphone are not connected with HFP, the remaining battery charge will not be correctly displayed.
  • If you connect the headset to an iPhone 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 immediately after a software update or 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.
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