Charging Case Battery
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Background
The Sony WF-1000XM4 is a pair of wireless earbuds made for audio playback and noise cancelation. The Sony WF-1000XM4 earbuds are the successors to the popular Sony WF-1000XM3 earbuds.
The top plastic surface of both earbuds is touch-sensitive and allows controlling noise cancelation-related functionalities and audio playback.
This device has suffered some issues while in production :
- Some users reported hearing crackling noise while noise cancelation is active
- There have been reports of some earbud explosions with this device.
No recall was officially made by Sony concerning the battery explosions at the moment of writing this page (06/2023).
Identification
The Sony WF-1000XM4 earbuds come with their charging case and are available in two colors, black or white. The Sony brand is located on the top of the charging case and on the side of each of the earbuds.
Technical Specifications
Earbuds
- Battery nominal voltage: 3.85v
- Battery capacity: 75 mAh/0,29 Wh
- Battery lifetime: ~8h
- Battery endurance: Up to 500 cycles
- Battery technology: Lithium-ion
- Noise canceling efficiency: from -13.17 dB to -34.86 dB (depending of the sound frequencies to cancel)
- Compatible Bluetooth codecs: SBC, AAC, LDAC
- Transducer diameter: 6 mm
- Frequency response: from 20 Hz to 40 KHz
- Processor: V1
Charging Case
- Battery nominal voltage: 3.7v
- Battery capacity: 500mAh/1.85Wh
- Battery technology: Lithium polymer
- Battery endurance: Up to 500 cycles
- Wireless charging: Yes
- USB-C charging: Yes