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+---
+slug: sony-1000xm4-battery-failure
+title: "Sony WF-1000XM4 Battery Failure"
+date: "2024-08-25T15:13:15-04:00"
+---
+
+I have owned my [Sony WF-1000XM4 bluetooth headphones][wf-1000xm4] for 2
+years.  Over the past few weeks the battery life has dropped from ~7
+hours to less than 1 hour.
+
+Apparently this is a common problem:
+
+- [Rising Number of Unexpected Sony WF-1000XM4 Explosions Are Haunting
+  Users (headphonesty.com)][headphonesty-article]
+- [WF-1000XM4 - Severe Battery Issues (reddit.com)][reddit thread]
+
+I follwed the recommendation in the [reddit thread][] and contacted
+[Sony support][].  After a brief chat they offered to email a shipping
+label and repair the headphones at no cost.
+
+If you own a pair of [WF-1000XM4s][wf-1000xm4] and the battery life
+decreases suddenly or they get very warm while charging, then you
+should:
+
+1. Stop using the headphones immediately because they [could
+   explode][headphonesty-article].
+2. [Contact Sony support][sony support] and ask for a repair or a
+   replacement.
+
+Sony should cover the cost even if the headphones are no longer under
+warranty (mine weren't); the battery life for a pair of 2-year-old
+bluetooth headphones should not deteriorate so abruptly.
+
+[wf-1000xm4]: https://electronics.sony.com/audio/headphones/truly-wireless-earbuds/p/wf1000m4-Black
+  "Sony WF-1000XM4 bluetooth headphones"
+[gadgets]: {{< relref "posts/2024-07-13-gadgets-of-the-ages" >}}
+  "Gadgets of the Ages"
+[headphonesty-article]: https://www.headphonesty.com/2024/02/samsung-wf-1000xm4-explodes-case/
+  "Rising Number of Unexpected Sony WF-1000XM4 Explosions Are Haunting Users (headphonesty.com)"
+[reddit thread]: https://www.reddit.com/r/SonyHeadphones/comments/x7mx2n/wf1000xm4_severe_battery_issues/
+  "WF-1000XM4 - Severe Battery Issues (reddit.com)"
+[rmaed]: https://en.wikipedia.org/wiki/Return_merchandise_authorization
+  "Return merchandise authorization (RMA)"
+[sony support]: https://www.sony.com/electronics/support/wireless-headphones-bluetooth-headphones/wf-1000xm4
+  "Sony WF-1000XM4 support"