shvivero2 years ago000I have lost the black charging case for the WF-1000XM4, where can I buy it separately?SonyEuropeBV2 years ago000Hi,We're sorry to hear that! The part number for the black charging case is A5036917B.Sony EuropeComment1 commentVirginia Parrotta2 years ago000We are very sorry to read that you have lost the case. The best thing to do is to contact our Customer Service directly. We will be happy to solve your problem individually. https://helpcenter.galaxus.ch/hc...Show in original language (German)Comment