Either side of the headphones can work as the main unit, and the main unit consumes more power than the other side. Because of this, the remaining battery level may vary between left and right. This is not a malfunction.
Note: The side that works as the main unit is not fixed and will be decided depending on the usage environment.
Also, using the voice assistant or Service Link feature may affect battery consumption.
- For the WF-1000XM4 model: Refer to this other article if the earbud battery levels are significantly different.
- For WF-1000XM3, WF-C500, WF-H800, WF-SP800N, and WF-XB700 models: The remaining battery level displayed on the Sony | Headphones Connect app screen or heard from the voice guidance is divided into the four stages listed below. Use this as a general guideline only.
|Display||Remaining battery charge|
|100%||100% - 71%|
|70%||70% - 51%|
|50%||50% - 21%|
|20%||20% or lower|