Zenipower Z55H Set of 2 These are genuine parts, the same model used in the WF-1000XM4. Please note that this item may be removed from sale if stock runs out, as it is also listed on other sites. We will ship after confirming the operation, so please purchase with confidence. Discounts on shipping are available for multiple purchases. Feel free to comment or request a combined purchase. The display may vary slightly depending on the production lot due to manufacturer product updates. Battery replacement is at your own risk, and we are not responsible for any failures during the battery replacement process. Compatible devices are as follows: WF-1000XM3 WF-1000XM4 WF-1000X WF-SP900 WF-SP700N WF-SP600N Please comment if you have any questions.