This is a Nikon lithium-ion battery. Li-ion Rechargeable Battery EN-EL25a Brand: Nikon Battery for Nikon cameras It is an EN-EL25a. Compatible models: Z50II, Z50, Z30, Z fc It was included with the camera and has been stored as a spare, so it is unused. It has not been dropped or bumped anywhere, so it is in beautiful condition with no scratches or dirt. I have taken it out as a spare, so please forgive any minor scratches. Regarding the above condition description, this is based on my subjective judgment, so please check the images carefully, and make your 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: 1250mAh - Size: Approximately 50.0 x 37.0 x 19.0 mm Thank you for viewing.