NC&reg; 5PCS Upgraded 3.7V 680mAh Battery for UDI U817 U817C U817A U818A WLtoys Quadcopter V959 V969 V979 V989 V999 V929 V949 V212 V222 NC is a registered trademark. ONLY Authorized seller of NC can sell NC products under NC listings. Includes: NC 5PCS Upgraded 3.7V 680mAh Battery for UDI U817 U817C U817A U818A WLtoys Quadcopter V959 V969 V979 V989 V999 V929 V949 V212 V222 Upgraded battery, longer flying time. Capacity: 3.7V 680mAh 100% Brand New & High Quality