Sony WH-CH710N Checking the remaining battery charge when you are using iPhone or iPod touch

When you are using iPhone or iPod touch

When the headset is connected to an iPhone or iPod touch over an HFP Bluetooth connection, it will show an icon that indicates the remaining battery charge of the headset on the screen of the iPhone or iPod touch.

A: Remaining battery charge of the headset

B: 100% - 70%

C: 70% - 50%

D: 50% - 20%

E: 20% or lower (requires charging)

The remaining battery charge of the headset is also displayed on the widget of an iPhone or iPod touch running iOS 9 or later. For more details, refer to the operating instructions supplied with the iPhone or iPod touch.

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

https://helpguide.sony.net/