Four Halcyon 2000 mAH Lithium Ion Replacement Battery and Charger Kit for Sony HVR-Z1U Handycam Camcorder and Sony NP-F550 Package Includes: 4 Halcyon Brand Battery & 1 Halcyon Brand Wall & Car Rapid Charger Battery Specs: 2000 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 Sony NP-F550 Batteries