The Nikon D600 battery is the Nikon EN-EL15 Lithium-ion battery pack. This rechargeable battery pack is also used in the optional D600 battery grip. It provides 1.9 Ah capacity and is rated at 7V. It uses the battery charger MH-25 which will charge the EN-EL15 battery from fully discharged to full capacity in about 2.5 hours.
Dimensions (L x W x H): 2.25 x 1.5 x 0.875 inches
Weight: 2 oz
Capacity: 1900 mAh
Cell: Made in Japan, assembed in China
Nikon EN-EL15 Rechargeable Li-Ion Battery for Nikon D600 at Amazon