New, unused button-type lithium-ion battery. 【Product Information】 ・Model Number: Z55H ・Condition: Unused, stored item This type is used in wireless earphones, hearing aids, smartwatches, etc. ※ Please be sure to check the compatible models yourself. 【Shipping】 ・Carefully packaged with cushioning material and shipped via anonymous delivery (Yu-Packet Post or Nekopos). ⚠️ Operation has not been confirmed. We cannot guarantee compatibility or usability, so please purchase only if you understand that this is a current item. No claims or returns accepted.