Sony's WF-1000XM4 earbuds

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Basic Information
Release date	June 8, 2021
In production	Yes
Official website	Sony WF-1000XM4

References

The video titled "Why you should never buy Sony earphones until they fix battery defects!" discusses significant battery issues in Sony's WF-1000XM4 earbuds, particularly after firmware updates. Users have reported severe uneven battery drain, with the affected earbud becoming excessively hot during charging. The common factor appears to be the 1.4.2 firmware update.

Reddit Archived

Key points:

• Battery-drain issues: Many users have experienced rapid battery depletion in one earbud, leading to significantly reduced usage time. [1]
• Overheating during charging: Some users have reported that the affected earbud becomes unusually hot while charging, indicating potential battery damage. [2]
• Firmware-update concerns: The 1.4.2 firmware update is commonly associated with these battery issues. Users have noted that downgrading to earlier firmware versions may alleviate the problem, but this is not a guaranteed solution.

Recommendations:

• Contact Sony support: If you experience these issues, reach out to Sony's customer service for assistance. They may offer warranty replacements or repairs.
• Monitor firmware updates: Be cautious with firmware updates. Before updating, check user forums and official communications for any reported issues related to the new firmware.
• Community feedback: Engage with online communities, such as Reddit's r/SonyHeadphones, to share experiences and solutions with other users facing similar problems.