How to Replace a Dead or Dying Battery on the Sony WF-1000XM4 Charging Case (DIY Repair Guide)
Has the battery life of your Sony WF-1000XM4 earbuds dropped significantly? Does the charging case fail to charge the earbuds properly, or do they never reach 100% even after sitting in the case for several hours? These are common signs of a failing charging case battery. Replacing the battery can restore reliable charging and extend the overall performance of your earbuds.