Four Halcyon 1200 mAH Lithium Ion Replacement Battery and Charger Kit for Nikon 1 J1 Digital SLR Cameras and Nikon EN-EL20 Package Includes: 4 Halcyon Brand Battery & 1 Halcyon Brand Wall & Car Rapid Charger 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 Batteries