2-Pack Z55H CP1254 Replacement Battery Kit with Repair Tools for Sony WF-1000XM4 Earbuds

Specifications Battery Part Number: Z55H Battery Type: Rechargeable Li-ion Battery Voltage: 3.85V Energy: 0.38Wh Compatible Models Sony WF-1000XM4 Package Includes 2 × Z55H Li-ion Replacement Battery 1 × Repair Tool Set Important Compatibility Note Please check your original battery part number, earbud model, battery size, and polarity before ordering. Professional installation is recommended because earbud battery replacement may require disassembly and soldering.