This is a Nikon lithium-ion battery. Li-ion Rechargeable Battery EN-EL25 Brand: Nikon Battery for Nikon cameras It's 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 came with the camera and is stored as a spare, so it's unused. I haven't dropped it or bumped it anywhere, so it's in beautiful condition with no scratches or dirt. I've taken it out as a spare, so please forgive any minor scratches. The above condition description 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, feel free to ask. - Brand: Nikon - Battery type: Lithium-ion - Voltage: 7.6V - Capacity: 1120mAh - Size: Approximately 50.0 x 37.0 x 19.0 mm It will be shipped via Nekopos.