Holy Stone 3.7V 500mAh 25C High-Rate Battery for UDI U817 U817C U817A U818A WLtoys Quadcopter V959 V969 V979 V989 V999 V929 V949 V212 V222 RC Drones(5 Pcs),obtain extra flight time:45mins 3.7V 500mAh 25C Lipo Battery Holy Stone brand OEM upgraded replacement part battery for U818A Lightweight, durable, practical and convenient to use Dimensions: 2.24 x 0.67 x 0.35 in (L x W x H) Quantity:3 pcs