Two Halcyon 1200 mAH Lithium Ion Replacement Battery for Nikon EN-EL20 and Nikon 1 Series Cameras, Nikon 1 AW1, Nikon 1 J1, Nikon 1 J2, Nikon 1 J3, Nikon 1 S1 Digital SLR Cameras Package Includes: 2 Halcyon Brand Battery Battery Specs: 1200 mAH with Premium Japanese Cells Halcyon Support: Includes 5 Year Halcyon Replacement Warranty. Full Membership Access to Halcyon Customer Support Website Frustration Free Packaging. No wasteful and dangerous plastic blister packs. Compatible with all cameras which take Nikon EN-EL20 Digital Camera Batteries