All batteries must be shipped by a ground shipping method. The RDQ battery line is the perfect cross-section between value, and performance. Aimed at giving a great flight experience, while not breaking the bank, these batteries are perfect for pilots of all skill levels. Check out our other 4S batteries, as well as the rest of our RDQ products! Specifications Nominal Voltage: 15.2V Cells: 4S Capacity: 660mAH Discharge Rate(Cont./Burst): 90C Discharge Lead: XT30 50mm Balance Lead: JST-XH 25mm Dimensions: 65x31x18mm Weight: 65g Includes 1x RDQ Series 15.2V 4S 660mAH 90C LiHV Battery - XT30