Sony WF-1000XM4 Repair : r/SonyHeadphones,Amazon.com: Z55h Battery for Sony WF-1000XM4 (1 Set) Compatible for Sony WF-1000XM4 Battery Replacement Sony XM4 Battery Replacement Sony Earbud ,Amazon.com: EXMUMCMR 𝟮𝟬𝟮𝟓 𝗡𝗲𝘄 𝗨𝗽𝗴𝗿𝗮𝗱𝗲𝘀 𝐙𝟓𝟓𝐇 𝐁𝐚𝐭𝐭𝐞𝐫𝐲,Compatible with Sony Headset Battery for WF-1000XM4(𝟐𝐏𝐂𝐒)+with Installation Tools Kit : ,2pcs ZeniPower Z55H Battery for Sony WF-1000XM4 XM4 Bluetooth Headset Headphones,I changed the batteries of the WF-1000xm4 : r/sony