The Sony WF-1000XM3 uses a replaceable coin cell battery : r/sony

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Sony Just Nerfed the Most-Repairable Earbud Line

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This is the original battery found inside your Sony WF-1000XM3 and WF-1000XM4 earbuds. You can buy from us knowing we do test each battery before we

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2pcs Varta CP1254 A3 Battery for Sony WF-1000XM3 WF-1000X WF-SP700N Headphones

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