This is a Nikon lithium-ion battery. Li-ion Rechargeable Battery EN-EL25 Brand: Nikon Battery for Nikon cameras It is an EN-EL25. Compatible models: Z50II, Z50, Z30, Z fc Regarding the Z50II, the EN-EL25a has been newly released, but it can be used in the same way. It seems that the operating time may be slightly shorter. It is included with the camera and is stored as a spare, and is unused. I have not dropped it or bumped it anywhere, so it is in beautiful condition with no scratches or stains. I have taken it out as a spare, so please forgive any minor scratches. Regarding the above condition description, it is based on my subjective judgment, so please check the images carefully, and please purchase after you are satisfied. Also, please read my profile before purchasing. If you have any questions, please feel free to ask. - Brand: Nikon - Battery type: Lithium-ion - Voltage: 7.6V - Capacity: 1120mAh - Size: Approx. 50.0 x 37.0 x 19.0 mm It will be shipped by Nekopos.